east of the roundabout: activating space in the town of santa fe

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East of the Roundabout Activating Space in the Town of Santa Fe, Mexico City Samuel Tellechea Pratt Institute Summer 2010

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East of the RoundaboutActivating Space in the Town of Santa Fe, Mexico City

Samuel Tellechea Pratt Institute Summer 2010

East of the Roundabout: Activating Space in the Town of Santa Fe, Mexico CityCapstone Project

Samuel TellecheaPratt InstituteGraduate Center for Planning and the EnvironmentMaster of Science in Urban Environmental Systems ManagementSummer 2010

Advisors:

Jaime SteinKate ZidarEnrique Martin-MorenoPerry WinstonKees van Rooij

Mexico city: Background inforMation

Mexico City is a place filled with contrasts. It is a fascinating metropolitan area located

in a valley at an altitude of 2,200 meters (7,200 feet) above sea level that over 20 million

people call home. It has been under constant change since the 14th century when it was

originally founded by the Aztecs. The location was not picked randomly, as one of their

gods had stated that the site for the new capital would be the place where they found an

eagle perched on a prickly pear eating a snake. The Aztecs named their city Tenochtitlán.

The setting back then barely resembles what Mexico City is today. The Aztecs settled on an

island in Lake Texcoco, one of the original five lakes that characterized the ‘Valley of Mexico.’

They built their lives around the lakes and created a series of canals and waterways that

were used for transportation and agriculture (remnants of these activities still exist in parts of

south Mexico City). Gradually, the city became one of the most important in Mesoamerica

as the Aztec empire became more powerful. Not surprisingly, when the Spanish arrived in

Mexico in the early 16th century, Tenochtitlán was targeted as one of the main city-states in

the region to conquer.

On August 13, 1521, Hernán Cortés conquered Tenochtitlán. The existing built and

natural environments would be forever changed: the city’s monuments were replaced or

built upon with buildings of colonial and European character, churches were constructed in

many parts of the city, and the lakes were gradually drained, rendering the entire system of

dikes, dams, levies and canals obsolete.1 It was a violent cultural and urban transition that

set the path for a series of problems the city faces to this day.

Although Mexico City has been the center of the country, it was not until the 20th

century that the city grew exponentially. It grew slowly and steadily between the 16th and

19th centuries, though by the end of the 19th century, the city became more industrialized,

as it possessed some of the best infrastructure in the country and a large consumer market.

Population estimates vary, and also depend on which entities in the metropolitan area are

accounted for, yet the overall growth of the city during the 20th century was staggering due

to increased migration.2

1940 1.6 million 1950 3.1 million 1960 5.4 million

1970 9.1 million 1980 13.1 million 1995 15.6 million

Generally, the capital city itself is considered

to have 8 million inhabitants, while the

metropolitan area is considered to have

over 20 million, making it one of the largest

metropolitan regions in the world.

Keeping up with the growth of the city

was not inconsequential. A megalopolis of this magnitude is always hungry for resources.

Ironically, a place that had abundant water sources is now suffering from thirst, perhaps

even dehydration. Over-extraction of water from the aquifer is taking place at a rate faster

than it can be replenished. Parts of Mexico City sink up to 12 inches each year due to the

unstable soil conditions and the receding aquifer3; many areas of the city, and particularly in

east Mexico City become flooded during the rainy season. Not surprisingly, most of these

areas are slums or low-income neighborhoods that were built on lake beds and, as the soil

is very salty, some of these slums present desert-like conditions.1 Malkin, E. (2006, Mar. 16) “ Once built on a lake, Mexico City now runs dry.” The New York Times. Http://www.nytimes.com/2006/03/16/world/americas/16iht-mexico.html?_r=2 [Accessed: June 12, 2010]

2 U.N. City Profiles. “Mexico City, Mexico.” United Nations Cyberschoolbus. Http://www.un.org/cyberschoolbus/habitat/profiles/mexico.asp [Accessed: June 25, 2010]

3 Gaynor, T. (2004, Apr. 30) “Water Crisis as Mexico City Sinks Faster Than Venice.” The Independent. Http://www.mindfully.org/Water/2004/Mexico-City-Sinks30apr04.htm [Accessed: June 25, 2010]

Mexico City Metropolitan Area New York City

Yet the grass is greener on the other

side: Mexico City is, in fact, a very green city

with abundant vegetation, except in parts

of the east side. It is also very flat, except

on the west and south where many hills

start making their way to the mountainous

topography. The west side, in particular,

is characterized by having some of the

wealthiest neighborhoods in the city, with

the occasional low-income neighborhoods

that have settled in the periphery as the

city has grown in most directions, while the

central areas are socially and economically

stable. This unregulated growth has also had

consequences, as forests, lakes, rivers and

ravines have been invaded with disregard

to the ecosystem. However, this invasion

has not only been carried out by informal

settlers and new migrants, it has been a

consequence of poor planning practices

under the continuous stress of a city growing

at a high rate in a short period of time.

Ironically, all these issues have come together in Mexico City’s new central business

district: Santa Fe. Not only does it reflect the reality behind Mexico’s society, it is an

example that questions the ability of the local government, real-estate developers, investors

and planners to successfully bring Mexico City into the 21st century. Mistakes from the

past have been repeated, a whole new set of problems were created, and sustainability

of the environment and of local communities has been compromised, all for the sake of

development.

“Attention! Ecologic reserve zone prone to flooding”Image near a slum in east Mexico City

Income distribution in Mexico City: red being the lowest-income areas, cyan middle-income, and green the highest-income areasSource: BIMSA

Santa fe

Located on the western edge of

Mexico City, Santa Fe is a new urban center

that has been developed over the last

thirty years. A large number of corporate

firms, three universities, shopping malls,

restaurants, residential buildings and

businesses have established here. However,

the site selected was perhaps not the most

adequate, bringing problems of all sorts,

such as transportation, lack of protection of the environment, social and environmental

justice issues and planning.

The story of Santa Fe began back in the 16th century. In order to fully conquer

the territory, the Spanish not only brought with them their culture, but also their religion.

Perhaps one of the main differences between the Spanish, British and French colonizers

is that the Spanish mingled with the local indigenous population of Latin America and

imposed a way of life and religion in the entire continent. For instance, European settlers in

the United States did not mingle with the Native Americans. In the case of most countries

of Latin America, it was a forced transition that created a new culture. The original town

of Santa Fe reflects the work of a man that became concerned with the wellbeing of the

indigenous population, Vasco de Quiroga.

Vasco de Quiroga was a judge in the 1530s of the Second Audiencia (court of the

Spanish empire representing the king, brought to the Americas to create laws and promote

justice). During his time in Mexico City, Quiroga founded the ‘hospital-town’ of Santa Fe in

1532 by acquiring land near the capital. He built a church, an orphanage, a nursery home,

a school and several homes with the help of a few dozen indigenous people and named

the town Santa Fe. Quiroga was deeply opposed to the exploitation and slavery of the

indigenous people, seeing them as ‘clean and pure’ individuals with potential to create a

‘new man.’ Contrary to other religious leaders of the time, Quiroga concentrated on the

spiritual, technical and the economic development of the people. Some of the activities

that took place in the town were caring for the ill, schooling, apprenticeships in matters of

the Church, handicrafts, agriculture and lodging for travelers.4 The town eventually had

30,000 inhabitants, and many of the indigenous people were baptized, married and taught

the principles of Catholicism. Residents of the town had to dedicate time to work for the

community, often on activities such as farming, although everyone had to learn a trade as

well. Ownership of the land was not allowed, and luxuries were forbidden. Quiroga later

went on to found other such towns in the

state of Michoacán in western Mexico.5

The town of Santa Fe did not

become part of Mexico City until the 19th

century and today is more of a low-income

neighborhood filled with problems than the

‘hospital-town’ that served the poor, needy or

those persecuted it once was. It is located

between several ravines and also surrounded

by other low-income neighborhoods. More interestingly, it is next to the high-income

development also called Santa Fe, Mexico City’s newest central business and residential

district: an architectural playground of modern high-rises, institutions and transportation

infrastructure, cleverly built on a place far from central Mexico City, complicated to reach

from most parts of the city, and specifically designed for automobiles. Access routes are

limited, and congestion is one of the main problems. In fact, “[…] getting between the old

and the new CBD is a challenge. Compared to the world’s other highly populated cities, the

4 Biografias. “Don Vasco de Quiroga.” Monografias.com. Http://www.monografias.com/trabajos58/don-vasco-de-quiroga/don-vasco-de-quiroga2.shtml [Accessed: June 3, 2010]5 Zarandona, J.M. ““The Biography of Vasco de Quiroga (1470-1565), Bishop of Utopia, byBenjamín Jarnés (1888-1949)”, Spaces of Utopia: An Electronic Journal, nr. 3, Autumn/Winter 2006, pp. 69-83. Http://ler.letras.up.pt/uploads/ficheiros/3063.pdf

The town of Santa Fe

distance from old to new in Mexico City is the greatest. The topography doesn’t help either.

The steep rambling terrain compounds the difficulty of commuting the 15 or so kilometers.

When distance and topography are factored together, it is the world’s most circuitous and

tilted urban corridor” (Inaba, P. 57)

Many people from different walks of life come to Santa Fe to work, most from different

parts of the city, and public transportation is limited and inefficient. The majority of the

existing businesses cater to middle and upper class residents, therefore creating a food

desert for most employees in the area. Although informal commerce was abundant even

a few years ago, most have been asked to relocate or leave. It was not uncommon to see

people selling food from the trunks of cars or stands, yet, for aesthetic and legal issues,

these have been cleared .

Overall, the contrast between socioeconomic classes is significant, both in new

Santa Fe and around it. Although there is no explicit discrimination from the government

or developers on the town of Santa Fe, actions do speak louder than words. It is, however,

a reality for many cities around the world, and probably the norm in Latin American cities:

“Urban segregation is not a frozen status quo, but a ceaseless social warfare in which the

state intervenes regularly in the name of “progress,” “beautification,” and even “social justice

for the poor” to redraw spatial boundaries to the advantage of landowners, foreign investors,

elite homeowners, and middle-class commuters.” (Davis, P. 98)

Main road infrastructure in the city

Santa Fe Santa Fe

Downtown Downtown

Subway infrastructure

WeSt of the roundaBout: Santa fe cBd

In order to regulate the urbanization process and planning for Santa Fe, Mexico

City’s government designated the area a ZEDEC (Special Zone of Controlled Development).

Despite being regulated, the neighborhood developed gradually with severe infrastructure

problems, mostly in terms of sewage, water supply, road access and transportation.

Although the majority of problems regarding water and drainage have been solved (to a

certain extent), transportation continues to be the main issue affecting visitors and residents

alike. There are five main access points that are continuously saturated with traffic,

especially during rush hours. Even new projects, such as three bridges built across ravines

and connecting the development to other main roads in southwest Mexico City proved to

be quite inefficient, creating problems where there were none. Arbitrary and unplanned

decisions like these have spurred widespread chaos. Further, being that Santa Fe sits

Roads, ravines and socioeconomic divisions in Santa Fe

Town of Santa Fe

Santa FE CBD

Roundabout

between two ‘delegaciones’ (municipalities),

transportation routes are not clear, and,

in terms of decision-making, eventually a

neighborhood committee was formed to

operate and manage the newly developed

area.

Undoubtedly, Santa Fe has been one of the

most important developments of modern

Mexico City. The area was previously

used for sand mining, to the extent that by

the 1970s, the area was deforested, largely eroded and in unstable conditions. The local

government noticed that much of the land was dangerous, and many informal settlements

were at risk. Therefore, it was first decided to turn the area into a nature reserve and to

provide more adequate uses to it. Eventually, the government planned a new edge city with

abundant commercial, residential, educational institutions, protected environment and road

infrastructure.6

It was necessary to relocate 1,500 families from the slums in the area and in July 27,

1984, the government made use of eminent domain to start clearing land for development.

The government took possession of several properties and chose Servicios Metropolitanos

(SERVIMET), a public-private company to turn the area marked by a sand mining past and

landfills into a modern, new development destined to satisfy several of the city’s needs. A

master plan was created with three main objectives:

Contribute to the protection of the environment, preserving ravines, existing »

vegetation, and an overall improvement to the quality of life of the local population

Satisfy jobs and real estate needs of west Mexico City »

Develop infrastructure to connect Mexico City with Toluca, a neighboring industrial »

city.5

Another related goal was to create a service sector to generate employment and

6 Longarini, Maria Pia. Propuesta para un centro cultural en el nuevo desarrollo de Santa Fe. Tesis. Universidad Iberoamericana. México, D.F., 1999

Recent projects, such as a bridge connecting Santa Fe to areas of southwest Mexico City have proved inefficient, as congestion and lack of transportation are not uncommon.

economic advantages. Two areas were designated for corporate buildings, two areas for

shopping centers, while other areas were zoned for scientific institutions, and recreation.

The ZEDEC master plan was put into effect, and out of the 800 hectares for ZEDEC, 30%

were designated for environmental preservation and 15% were designated for housing.7

One problem that arose due to the quick development of Santa Fe was that the

government took possession of the land through SERVIMET (mostly through eminent

domain) and sold it to the private sector. However, it was the government’s responsibility to

provide infrastructure and services, while the new owners were responsible for remediating

the land.6 This did not go as planned, and problems with water supply, sewage and paving

were an issue until recently. It was not uncommon to see trucks supplying water to Class A

office buildings. SERVIMET faces several lawsuits for over $70 USD million by companies

that took part in the development of Santa Fe due to the fact that infrastructure and services

were incomplete.8 Further, a neighborhood association called Asociación de Colonos de

Santa Fe was established to take issues into the hands of residents and as an intermediary

between residents and the local municipalities.

Little relationship exists between the settlements surrounding Santa Fe with the Santa

Fe CBD. Some of the previously existing informal settlers around the area had located their

7 Cano, D. (1999, Nov. 1) “Santa Fe, bujia de desarrollo.” El Universal. Http://www2.eluniversal.com.mx/pls/impreso/noticia.html?id_nota=3498&tabla=ciudad [Accessed: June 5, 2010]8 Llanos Samaniego, R. (2002, Oct. 1) “SERVIMET, paraestatal poco rentable.” La Jornada. Http://www.jornada.unam.mx/2002/10/01/037n1cap.php?origen=capital.html [Accessed: June 5, 2010]

Informal commerce is still present in many parts of Santa Fe. Meanwhile, the Santa Fe Shopping Mall is one of the biggest in Latin America, with a wide variety of department stores and luxury boutiques.

homes in the area of and around Santa Fe to benefit from the mining and landfill activities.

While some of these were cleared for the development of the new CBD, most have been

incorporated into the city. However, one of the outcomes of building a new, contemporary

city next to low-income neighborhoods was the contrast generated between them and the

growth of informal settlements to take advantage of the new services offered in Santa Fe.

Although there have been considerable investments in real-estate and infrastructure, there

have been no meaningful interventions for improving the living conditions of the surrounding

neighborhoods nor investments in affordable or middle-class housing within easy reach

from Santa Fe. In fact, there has been a 350% increase since 1982 in informal settlements

around Santa Fe, most having taken place on land designated for conservation/preservation,

particularly on the slopes of hills and ravines.9

ravineS: exiSting conditionS

Most of Mexico City is located in a

valley surrounded by mountains. On the

west side of the city, a series of hills rise from

the plateau towards the mountains, forming

many ravines that characterize this part of

town. These ravines are composed mostly

of volcanic rock, ash, pumice and caliche

(calcium carbonate deposits), and were

formed millions of years ago. Though the

exact way in which the ravines were formed is not

known, there are two possibilities: they were a product of shifts in tectonic plates, or, created

by pluvial and fluvial waters going northeast and downhill.10

9 Sistema de informacion del desarrollo social. “Programa Delegacional de Desarrollo Urbano Alvaro Obregon.” Http://www.sideso.df.gob.mx/documentos/progdelegacionales/alvaro%5B1%5D.pdf [Accessed: July 8, 2010]

10 Canedo Castro, M. “Conservacion y recuperacion de barrancas del poniente de la Ciudad de Mexico.” Instituto Nacional de Ecologia. Http://www.ine.gob.mx/descargas/dgipea/pon_barranca_poniente_cd_mex.pdf [Accessed June 26, 2010]

Ravines and forests are under pressure due to encroachment from residential developments.

Mexico City’s setting was once very different:

it was a plateau with five lakes and an

extensive system of canals and agriculture

during the time of the Aztec empire. After

the arrival of the Spanish, and as Mexico City

grew into a megalopolis, extraction of surface

water, and later groundwater took place at

a rate that led to the disappearance of the

lakes, as well as extinction of many endemic

species. Nowadays, one lake (Lake Texcoco in

the northeast) and the canals of Xochimilco and Tláhuac in southeast Mexico City are all that

remain.

The ravines found on the west side of Mexico City are an important source of water

filtration and rainwater catchment. Naturally, the water accumulating in these ravines would

flow downhill. And it still does. However, as is the case in many cities, informal settlements

have taken place in these nature reserves, and many ravines have become polluted.

Oftentimes, where rivers flow, sewage and garbage contribute to the degradation of the

ecosystems. The ravines around Santa Fe are not the exception, as they have become

polluted and because some of the recently constructed buildings still discharge sewage

directly to the rivers flowing through ravines until they reach the appropriate infrastructure.

Out of the 74 ravines found in west Mexico City, all present problems such as informal

settlements, erosion, pollution and deforestation. This impairs ravines from functioning as

part of a lager system of rivers, streams and rainwater catchment, although not all ravines

contribute to recharging the aquifer.10 These problems need to be addressed at the local

government level, yet, as of 2009, no projects from different municipalities proved promising,

and the situation persists.11

Though most of the sewage coming from Santa Fe is now connected to the

infrastructure of the city, most goes untreated. Three water plants in different ravines in the

11 Martínez, Edith (2009, Jul. 20) “Barrancas de Santa Fe, “cloacas” de corporativos.” El Universal.Http://www.eluniversal.com.mx/ciudad/96517.html [Accessed: Jun. 15, 2010]

Ravines south of Santa Fe, with informal settlements present in many areas.

area exist, but none is operational. One of

these is in an area called Jalalpa, close to

Santa Fe and built to treat water from the

newly developed area, yet it lies dormant

because of lack of funds. There are mainly

three rivers that flow in the area east of Santa

Fe: Tacubaya, Tlapizahuaya and Becerra. As

they flow downstream, they carry sewage

and garbage with them. Most of the Becerra

River flows along the town of Santa Fe until it

joins the Tlapizahuaya River. They both converge at a dam that protects the neighborhoods

downhill. However, the dam is old and run-down, and brings a risk of infectious diseases to

the surrounding neighborhoods as trash and

waste accumulate, and is at risk of breaking,

threatening the population downhill. There

are no wells for water absorption for treated

water or rainwater.10

The ravines around Santa Fe are

designated as protected areas (AVA

– Áreas de Valor Ambiental, literally

Areas of Environmental Value) under the

municipality’s zoning plan: areas that, due

to their characteristics, constitute elements

of value for the environment that must be

rescued or preserved, such as ravines, rivers,

streams, canals and forested areas.12

Although different government

agencies interact to address the

12 Secretaria de desarrollo urbano y vialidad. “Programa delegacional de desarrollo urbano, Alvaro Obregon 1997.” Http://www.seduvi.df.gob.mx/seduvi/cartografia/programasdelegacionales/aobregon.pdf

La Loma Santa Fe, where a few buildings continue to discharge sewage into the Becerra river.

Streetscape near the Becerra river.

safeguarding and management of land designated AVA, the Direction of Urban

Reforestation, Parks and Bicycle Circuits (Dirección de Reforestación Urbana, Parques y

Ciclovías), which is part of the Ministry for the Environment (Secretaría del Medio Ambiente)

is the main entity. The purpose of this agency is to implement policies and programs

to protect the environment, improve living conditions and promote cycling as a means

of transportation. Some of the main objectives are the following: prioritize use of native

species, create policies to improve, create and rehabilitate protected areas, provide training,

promote involvement of citizens to enforce environmental protection, and improve and

create infrastructure for cyclists.13 They are also concerned with issues such as recharge

of the aquifer, pollution reduction, heat-island effect, noise, erosion, recreation and wildlife

protection and ecosystem services within Mexico City, and provide several programs to

address them, such as:14

Plant production in nurseries to satisfy demand for municipal projects (limited to »

native species grown in two nurseries in the city)

Plant donations for projects or open spaces that would benefit from more »

vegetation (residential compounds, medians, community gardens, parks)

Garden maintenance through sponsorships from the private sector (medians, »

community gardens, AVA designated land)

Tax incentives for plots with over 30% vegetation »

Infrastructure, initiatives and policies to improve conditions for cyclists »

Designation of AVA land use »

The Direction of Urban Reforestation, Parks and Bicycle Circuits also manages the

Ravine Information System (Sistema de Información de Barrancas) web site, providing

materials in order to discuss existing conditions and to address problems, proposals

and offenses related to ravines. Ravines are defined as geographic depressions with

topographic and geologic characteristics that allow them to be wildlife refuges, rainwater

catchment systems, source of rivers and storm water management, and significant

13 Secretaria del Medio Ambiente. “Mision, Vision y Objetivos.” Direccion de reforestacion urbana, parques y ciclovias. Http://www.sma.df.gob.mx/drupc/index.php?opcion=2 [Accessed: July 17, 2010]14 Secretaria del Medio Ambiente. “Que son las areas verdes urbanas” Direccion de reforestacion urbana, parques y ciclovias. Http://www.sma.df.gob.mx/drupc/index.php?opcion=22 [Accessed: July 17, 2010]

contributors to ecosystem services and hydrological cycle of the region.15

The main problems identified by the information system in most of the ravines in Mexico City

are:

Change of land use »

Pollution »

Development pressure for real-estate development »

Lack of available information for the population in general »

Solid waste and wastewater issues »

Loss of biodiversity »

Unbalance of ecological and hydrological functions »

Risk-prone areas for inhabitants (landslides, floods and fires) »

Demolition and industrial waste »

Lack of coordination between different government agencies »

This information system also indicates that a large number of government agencies

are involved in the safekeeping of ravines (for example, the Ministry for the Environment,

National Water Commission, Urban Development and Roads Ministry, the municipalities,

Ministry for the Environment, and Office of the Attorney General, among others).

Five directives exist to address protection, conservation, restoration, environmental and

15 Secretaria del Medio Ambiente. “Contexto Basico.” Sistema de informacion de barrancas. Http://www.sma.df.gob.mx/barrancas/index.php?op=06_definiciones [Accessed: July 19, 2010]

Existing conditions in the ravine and river. Large areas have been deforested and the river is severely polluted with trash and sewage

urban rescue plans regarding ravines. These provide sets of guidelines and manuals to deal

with issues such as reforestation, identification of problems, informal settlements, use of

native species, wildlife preservation, flash floods, solid waste and wastewater management,

among others. It also discusses risk and disaster management, climate change, and

provides recommendations in case of emergencies (particularly intense rain and sewage

overflow affecting informal settlements).

Overall, there is a clear recognition of the importance of ravines and the ecosystem

services they provide. Fines for offenses affecting ravines are severe, although it is likely

that laws are rarely enforces, perhaps because of the large number of entities involved,

bureaucracy, political and development interests and lack of funds.

eaSt MeetS WeSt

Santa Fe was planned almost like a

tailored suit with very well delineated roads

and specific zoning regulations. It could very

well be the pride of city planners and real-

estate developers (ironically, although it was

planned specifically for automobiles, there is

not enough parking and valet parking mafias

rule the streets). The wide gap between rich

and poor that characterizes Mexico and many

other Latin American countries becomes

evident: regardless of all the investment and presence of international corporations, luxury

condominiums, embassies, private schools and high-end shopping, the contrast between

neighborhoods is an issue. There is no connection between the neighborhoods (except

at a roundabout in Vasco de Quiroga Ave.). There are no buffer zones. It is almost a slap

in the face for both sides, and most are unhappy with the situation. For the new CBD, the

Many streets in the town have views of the Santa Fe CBD, intensifying contrast between neighborhoods.

low-income communities are an unpleasant sight and even a threat. For the low-income

residents, the existence of such a place is also threatening and has significantly changed

their way of life.

Local government entities have also failed to satisfy needs and find solutions, in

addition to the corrupt and futile actions of SERVIMET. Nowadays, the governance of Santa

Fe CBD lies in the hands of an entity created by the community, collecting funds, distributing

taxes for improvements and addressing problems. In the case of the surrounding towns,

they depend mostly on the municipality. There is no apparent relationship between the

Neighbors Association of Santa Fe with the rest of the communities around.

In an interview with one of the leaders of the community, Mr. Juan Cisneros, the

importance for a better relationship between both sides was stressed. The town of Santa Fe

has consistently suffered the chaos brought by a poorly planned city. Some of the findings

and comments are the following.

The water in the river used to be clean 35 years ago. However, the increase in »

population and sprawl has led to pollution of the ravines and rivers with sewage

and waste. Collection trucks rarely make it downhill because of the complicated

topography. Further, there have been cancer cases related to the unhealthy state of

the river (unconfirmed).

Santa Fe was a site characterized by sand mines and four landfills (Prados de la »

Montaña, Alameda Poniente, the roundabout at Vasco de Quiroga, and the current

location of Santander Serfin bank). The first actions the government took to spur

development was the use of eminent domain and removal of slums.

The geography of Santa Fe was completely devastated by the mining activity, »

including deforestation and pollution.

A supermarket and housing development were built in the town of Santa Fe on a »

site where there used to be single-family residences and a soccer field used by the

locals. In exchange for this, SERVIMET promised to hand in the Alameda Poniente

once it was remediated. Around 1998, SERVIMET began using the Alameda

Poniente as a parking lot and soccer field for its employees, and the people of the

town have been told that the land will not be granted to them (unconfirmed)

Jalalpa water treatment plant is not operating due to the high cost required. It was »

built around 1997 on a hill next to the Becerra river ravine, and SERVIMET agreed

that the water plant would be used to treat water from new Santa Fe, and that part

of the water would be used for irrigation in the town of Santa Fe (unconfirmed).

Some of the outcomes of having Santa Fe as a neighbor have been increased rent, »

encroachment of medium-income developments, a serious traffic problem, social

issues within the town, increased interest in selling land due to higher property

values, increased taxes, and more crime (murder, drugs, gangs, auto theft, petty

crimes)

At one point, the government offered relocating the citizens of towns around Santa »

Fe to different cities around Mexico City (unconfirmed).

SERVIMET sold a large number of plots at a cheap price because many were »

perceived to be polluted (though in reality, only 4 sites were used as landfills).

Further, the company had offered to provide jobs for locals, yet it did not happen

(unconfirmed)

A large number of businesses in the town are informal. Although the government »

has suggested improvements to storefronts and buildings along Vasco de Quiroga

Avenue, most people are afraid to pay more taxes or lose their property.

Most people in the town own the land they live in, although informal settlements »

exist as well. At one point, the people of the town tried to take possession of a

hilltop (now La Loma residential complex), yet they were not allowed to because

the area was designated for preservation. However, a few years later, and after

reforesting the hilltop, a series of upscale buildings were built, and the trees were

cut down and thrown down the ravine (unconfirmed).

A vision for the town of Santa Fe should include an overall improvement in the »

quality of life, better streets and transportation, more support from Santa Fe, better

public and recreational areas, and cleaning of the river. Santa Fe was once a place

where persecuted and needy people were assisted from being overexploited by the

Spanish, yet now they feel persecuted by the wealthy and the government.

Investors, corporations and the government need to treat the people of the town »

with respect. Without old Santa Fe’s support, new Santa Fe has no hope for a

successful future.

Written communications with members of the Neighbors’ Association of Santa Fe

were also attempted. Although they responded to the first requests offering answers for the

purpose of this research, they eventually did not answer any questions.

MiSSion StateMent

Considering the existing conditions of the town of Santa Fe and the situation the

community is living in, there is a need for solutions that will improve the quality of life

through proposals that address environmental and social justice issues, as well as restoring

the environmental damages that threaten the sustainability of the site. Most of the local

government’s efforts have been geared towards the Santa Fe CBD, casting a great shadow

on the surrounding communities

Three goals will be addressed for the purpose of this proposal regarding the town of

Santa Fe:

Activate space »

Spur economic development »

Promote environmental sustainability »

The site has the potential to become a place where recreation and economic

development are combined. Currently, the ravine south of the town of Santa Fe presents

several environmental problems, such as pollution of the river, deforestation and erosion.

There is an urgent need to clean the river and promote community involvement in keeping it

safe and clean. Sewage should be kept from reaching the river from the town and the CBD

by adequately connecting it to the main sewage system or creating a more efficient one,

while also contemplating the possibilities of recharging the aquifer with clean water.

There are many areas that can be used for recreation along the river, including the

improvement of existing soccer fields and the creation of gathering spaces, and a greenway/

bike path communicating the different neighborhoods. Eroded slopes of the ravines and

parts of the riverbank could be used for production of edibles and non-edibles, creating

a new business activity that could bolster the community’s economic development while

restoring habitat and the ecosystem services provided by ravines.

In order to achieve such a proposal, several steps would need to be taken. For

instance, although Mexico City’s temperature is fairly temperate throughout the year, an

average 26 inches of rain fall each year, but mostly from late spring to early fall. For this

reason, rainwater harvesting from the swelling of rivers and on the upper parts of the ravines

would be necessary to store water for the dry season. Additionally, if the Jalalpa water plant

was made operational, treated water could be used for irrigation purposes, both in the town

and in the CBD

Historically, some of the activities that were done by the original settlers when Santa

Fe was a ‘hospital-town’ were related to making handicrafts and working on agriculture, and

every citizen of the town was required to work. Reestablishing these activities could very

well increase the chances for economic success and diversify jobs, increase recreational

activities and provide a sense of community. There are wide swathes of open, unused and

degraded space along the river, and few steps have been taken to activate space and make

use of it for improving the environment and the quality of life.

ProPoSal

Gabion Walls and Magueys on the Slopes of the Ravine

Several parts of the ravine are deforested and eroded. Although a way to address

this in the past has been to cover slopes with concrete (often using the surface to paint

murals), this does not address restoration of the natural habitat or soils. Gabion walls are an

alternative that has been used in parts of Mexico and South America to prevent erosion and

for terraced agriculture.

Gabion walls are cost-effective wall

systems that are composed of galvanized

steel baskets filled with rocks. They provide

slope stabilization, while allowing for water to

dissipate through the rocks. They are also

flexible, and adjust to withstand pressure

without deforming.16

Terraces could be created and

maguey plants could be used to create a new landscape for the site. The maguey plant has

been used in Mexico for at least eight centuries. Its properties allow it to be employed as

medicine, fiber, building material, fuel and fertilizer (from its ashes). It was used on terraced

agriculture for inter-planting with grain crops on the hillsides of villages and is characteristic

of the central highlands of Mexico. It can thrive at high altitudes and sustain periods of

drought, yet they can also withstand frost, which is not uncommon during the winter,

especially in areas such as ravines.17

The combination of gabion walls and magueys would have two main objectives.

Create a scenery on the landscape to enhance the quality of the open space while

addressing the problems of erosion in the area. Aside from being culturally appropriate and

16 Modular Gabion Systems. “Gabion Walls Design.” Http://www.gabions.net/downloads/Documents/MGS_Design_Guide.pdf [Accessed: June 28, 2010]17 Evans, S. “The Productivity of Maguey Terrace Agriculture in Central Mexico During the Aztec Period.” Latin American Antiquity. Vol.1, No.2, 1990. Http://www.anthro.psu.edu/faculty_staff/docs/Evans_Maguey_1990.pdf

native to the region, magueys enrich and strengthen the soil, preventing further erosion and

providing slope stabilization along with the gabion wall system. Further, magueys can be

exploited for certain derived products and add to the economic development of the place.

Magueys are perennial succulents belonging to the Agavaceae family. They have been used

in Mesoamerica for many centuries. Before the arrival of the Spaniards, agaves were widely

used for obtaining sap and fibers. After sugarcane was introduced in Mexico, the use of agaves

declined rapidly.

Agaves are native to North America, with the majority of species existing in Mexico. Its

fibers can be used for cloths, ropes and baskets, among other products. Its leaves are useful for

cooking ‘barbacoa,’ as, traditionally, a sheep is placed in a hole in the ground and covered with

maguey leaves. A more popular product is pulque, a milk-colored alcoholic beverage obtained

from the sap of magueys. Recently, there has been increased interest in using agave nectar as a

substitute for sugar or corn syrup. This nectar can be obtained from a related species also native

to the highlands of Mexico, Agave salmiana.

Source: El Agave. Http://www. elagave.org. Image source: Http://commons.wikmedia.org

Restoration of Habitat

It is urgent to clean the rivers around the town of Santa Fe, as well as an active

preservation strategy that involves the communities living in or near ravines in west Mexico

City. There are considerable amounts of garbage present in the river, particularly east

of the Santa Fe CBD. Sewage is also an issue that needs to be solved, as most of the

sewage from the town is discharged into the river, as well as sewage from some of the

high-end buildings in the CBD. This is a situation that needs to be addressed by the local

government, the National Water Commission and the community.

Some of the rivers in the area eventually converge at dams located downhill. Due

to the lack of appropriate infrastructure, sewage is present in most of them. Garbage is

an issue, and it is also not uncommon to find demolition waste being placed at the dams.

The water in theses places is polluted and could eventually cause health problems to the

communities. These fabricated wetlands could provide more ecosystem services and

interventions could be made to recharge the aquifer.

Reforestation is also a need that is very present in several ravines. Unfortunately,

there are many species that have been planted that do not belong in these places, such as

eucalyptus. The government supports reforestation with native species, and more use of

ash, oak and pine trees should be planted to enhance the environment and preserve the

forest-like conditions of many of the ravines.

Areas for rainwater catchment could be built to address irrigation during the dry

season. The water could be used for open spaces, nurseries, recreation and recharge of the

aquifer.

Areas for Recreation / Connecting Spaces

A few areas for recreation exist in the neighborhoods along the Becerra river, such as

playgrounds, small parks and a couple of soccer fields. The soccer fields, in particular, are

in poor conditions. Although there are roads that run parallel to the river, they are not always

continuous.

A new path would be proposed to connect the different neighborhoods. A bike lane

could easily be placed along the river, especially considering that Mexico City’s government

is trying to promote the use of bicycles as a means of transportation. Having a better way

of travelling in the lower parts of the ravine could present itself as a convenient alternative

to using Vasco de Quiroga Ave. and would also increase recreational spaces for the

community.

The soccer fields could be restored and even used for distribution of plants collected

from the proposed nurseries. These spaces would be ideal for multiple functions.

San Borja Ravine Case Study

A ravine five kilometers away from Santa Fe went through a transformation process to

become a community garden for a low-income neighborhood. With the assistance of the

local government and from different universities in Mexico, the community turned a place

characterized by garbage into productive land. It was started in 2009, and is now run by a 30-

person cooperative providing food for over 70 families in the neighborhood. Lettuce, tomatoes,

squash, cucumbers, radish and beans are now

being harvested.

Over 1,200 tons of garbage were

collected from the ravine and the San Borja

river, and a new irrigation system was put

in place for the project. Members of the

community have received training on how to

manage the site, and they take turns with the labor required to achieve production.

Most of the funding for this project came from fines charged to construction companies in

the area, and were provided by the municipality. This project was a finalist in the Deutsche Bank

Urban Age Awards on July 22, 2010, and was part of an initiative from the municipality and the

National University of Mexico (UNAM) to create a model for rescuing ravines.

Sources:Alvarez Laris. C (2009, Jul. 14) “Rinde frutos el rescate de un espacio muerto en la barranca de San Borja.” La Jornada. Http://www.jornada.unam.mx/2009/07/14/index.php?section=capital&article=033n1capDeutsche Bank Urban Age Award, Mexico City 2010. LSE Cities. Http://www.urban-age.net//news/updates/2010/07/dbua-award-winner/

Economic Development

The economic development proposal for the underused spaces is an opportunity that

could only take place with a committed involvement of members the community and support

from the local government, NGOs, private investors and micro-credits. Nurseries with plants

that are often used in landscape architecture projects in the Santa Fe CBD could be installed

along in open and underused spaces along the river. Considering that many buildings are

under construction in the CBD, the location of these nurseries could reduce transportation

costs and provide a higher profit for producers selling plants to developers and contractors

working in projects in the CBD. This activity could also diversify jobs and skills in the

community, particularly for elders, children, women and the unemployed.

Further, magueys could also provide to the economic development of the community.

One product derived from maguey is fresh sap (aguamiel) which is a watery substance

that can ferment and be used to produce pulque, an alcoholic beverage that, although it

was very popular in Mexico many years ago, still retains some popularity, particularly for

low-income communities and even tourists. Other products obtained from magueys are

fibers that can be used for making thread, ropes, baskets, brooms; leaves of the maguey

are also used for cooking.17 Perhaps even workshops for handicrafts as those previously

used during Vasco de Quiroga’s time could be installed, allowing for marketing of products

(ideally in the shopping malls in Santa Fe CBD or markets for artisan products).

Urban agriculture is also an option for the area, taking advantage of underused

open space in the ravine as well as backyards in private homes. Water would be an issue,

especially considering that sewage is present in the river, therefore, water harvesting

techniques would be necessary through rainwater catchment on the upper parts of the

ravine or, in the future, from the river itself. Magueys also support other crops, such as

beans and corn, that can be inter-planted in the same place, all depending on the distance

between maguey plants. This system with terraced agriculture could optimize water usage

for irrigation.17

Successfully obtaining products from maguey plants can take years, and requires

knowledge of the techniques to make the most of each plant. Once the plant is over eight

years old, sap can be extracted on a regular basis by up to ten liters per day. After that

process, the sap can be placed in 50-liter barrels and fermented for approximately two

weeks. The final product is pulque, a popular alcoholic beverage in many parts of Mexico,

and particularly in low-income communities that could also be marketed.

Making it Happen

Urban agriculture has been recognized as a means to improve the environment and

allows for more democratic and sustainable cities.18 Currently, Mexico City’s government is

seeking to invest up to $10 million USD for sustainable agricultural practices.19 The Ministry

18 Blumenthal, U.J. D.D. Mara. “Reducing the Risks of Using Wastewater in Agriculture.” Urban Agriculture Magazine Vol. 3, RUAF Foundation. June, 2005. Http://www.ruaf.org/node/14719 Balboa, B. (2010, Apr. 8) “Impulsa GDF agricultura urbana.” El Universal. Http://www.eluniversal.com.mx/notas/671573.html [Accessed: July 24, 2010])

Yield from vegetable gardensYield in pounds

per foot*

Yield in pounds

per meter

Yield in kilogram

per meter

Price per kilogram

**

Total MXN per

meter

Total USD

per meter

Cucumber 1 3.28 1.49 6.00$ 8.92$ 0.70$ Lettuce 0.5 1.64 0.74 10.00$ 7.43$ 0.58$ Potato 2 6.56 2.97 10.00$ 29.72$ 2.34$ Squash 2 6.56 2.97 8.00$ 23.77$ 1.87$ Tomato 2.5 8.2 3.71 9.00$ 33.43$ 2.63$ Spinach 0.8 2.624 1.19 10.00$ 11.89$ 0.93$ Onion 1.5 4.92 2.23 5.50$ 12.26$ 0.96$

Yield from nurseries

Yield per square

meter (items)

Average price in

markets USD

USD per square

meterFern 9 2.00$ 18.00$ Elephant's Ear 5 5.00$ 25.00$ Lavender 40 1.00$ 40.00$ African Iris 20 2.00$ 40.00$ Phormium 12 3.00$ 36.00$ Azalea 4 10.00$ 40.00$ Salvia 30 1.00$ 30.00$ Silverthorn 4 2.00$ 8.00$ Kangaroo Vine 50 1.50$ 75.00$ Juniper 4 20.00$ 80.00$

* Community Garden Guide Vegetable Garden Planning and Development. USDA Natural Resources Conservation Service. http://plant-

materials.nrcs.usda.gov/technical/publications/newpublications/PMC_final_Garden%20guide%20Nov%2009.pdf [Accessed: July 25, 2010]

**ASERCA. Reporte de Precios Diarios de Hortalizas observados en diversas Centrales de Abasto. http://www.aserca.gob.mx/sicsa/hortalizasnacional/hna_ca1.asp [Accessed: July 25,

2010]

Sources

Sample yields from nurseries in Mexico City and average community vegetable gardens

for Rural Development and Community Equity (SEDEREC – Secretaría de Desarrollo

Rural y Equidad para las Comunidades), a branch of the local government, promotes

commercialization and distribution of sustainable practices through activities such as

agriculture and handicraft production to address social welfare of communities in the city.

The Program for Small Scale Sustainable Agriculture (Programa de Agricultura

Sustentable a Pequeña Escala) arose as a way to tackle climate change, food security and

nutrition by supporting sustainable projects, while increasing profitability from agricultural

practices. The aim of the project is to increase production of organics, protect biodiversity

and invest on technologies and research. Urban agriculture is supported to increase

community involvement, maximize resources, optimize labor, diversify crops and to get

citizens involved in food production of organics, herbs and healthy foods in the city and

peripheral areas. Low-income communities, and mostly women and elders can take

advantage of these programs, and local participation is encouraged.20

This program was put into effect in 2007 to address urban and suburban communities

that have no access to federally funded projects. Many areas within Mexico City are

available for agricultural activities and can be exploited for production, particularly favoring

self-consumption for families and communities. Almost 1,300 projects have been approved

in different municipalities of the city since 2007, investing over $1.3 million USD, mostly

in animal production, but also on agricultural activities and infrastructure for irrigation and

greenhouses. In terms of organics, strawberries, tomatoes, lettuce, spinach, broccoli and

mushrooms were supported with over $250,000USD.20

When private capital is not available to fund projects, other ways to fund the

production of edibles and non-edibles include micro-credits (oftentimes supported by

international donors, national governments, banks or NGOs), subsidies, and savings.

Combining these financing alternatives with the support provided from the local government

could increase the possibility of success: “savings could, for example, work as collateral

for receiving credit. Tax incentives or other subsidies could motivate people to become

20 Secretaria de desarrollo social y equidad para las comunidades.”Programa de agricultura sustentable a pequeña escala en la Ciudad de Mexico.” Proyectos especiales y vinculacion comercial. Http://www.sederec.df.gob.mx/proyectos_agricultura_sustentable.html [Accessed: July 25, 2010]

involved, and complement credit systems with training and assistance, and in this way better

guarantee success and sustainability of the (integrated) support programs.”21

Community Supported Agriculture could present itself as a potential option to get

members of the community involved, perhaps even some in the CBD. CSA programs work

by seeking potential investors who will receive produce in exchange for their support of the

program.22

The Ministry for the Environment could also support projects to produce more native

plants in nurseries that provide production of plants for city projects (such as medians and

parks), but can also donate plants to areas that are in need of more vegetated spaces. The

greenway/bike path proposal could also be supported by this agency. There has been

increased interest from the government to provide more infrastructure for bike use, as well

as recent bike-sharing/rental programs that have worked successfully in central parts of the

city.

Overall, the aim is that the community retains a sense of ownership over land that

is currently underused and at risk. There are plenty of government programs that could

support projects in the neighborhood, but perhaps adequately implementing these and

involving the community is what has prevented any actions from taking place.

21 Dubbeling, M. “Financing Urban Agriculture.” Urban Agriculture Magazine Vol. 9. RUAF Foundation. April 2003. Http://www.ruaf.org/node/29122 Local Harvest. “Community Supported Agriculture.” Http://www.localharvest.org/csa/ [Accessed: Jul. 28, 2010]

Town of Santa Fe

Roundabout

Town of Santa Fe

Santa FE CBD

Santa FE CBD

Supply of produceCSA

Supply of nursery plants Supply

of magu

ey pro

ducts

Supply of produce

Santa Fe CBD has very defined zoning regulations in contrast with the surrounding neighborhoods. The layout of the development has allowed for further segregation due to its scale and because it was planned specifically for automobile use. Little flexibility exists to integrate the other communities. There are, however, a few open public spaces that could be used for activities involving the inhabitants of other neighborhoods.

If the space along the Becerra river is used for production of edibles and non-edibles, nursery plants could be supplied for new and existing developments in the CBD; produce could be integrated through Community Support Agriculture - involving those in the community who are interested. Products from maguey, such as pulque, fibers and agave nectar could be supplied to potential consumer markets in the city.

ProPoSal: viSualS

Restoration of habitat

Restoration of habitat

Restoration of habitat

Restoration of habitatBike path

Bike path

Rainwatercatchment

Rainwatercatchment

Gabion wallsMagueys

Gabion wallsMagueys

Recreation

Edibles andnon-edibles

Edibles andnon-edibles

Edibles andnon-edibles

The ravine along the Becerra river, south of the town of Santa Fe has the potential to be regenerated into open space that is environmentally stable as well as productive.

Activating space would bring an improvement to the quality of life and involvement of the community.

Cleaning the river is indispensable, and, as seen in the San Borja river ravine, it is possible with the involvement of the government and the community.

Deforestation

Pollution

Erosion

Rainwater catchment would be necessary for irrigation of the productive land.

Gabion walls and maguey would provide a new scenery protecting the ravines from further erosion and spurring economic development.

next StePS

Despite the great number of challenges to succeed, the power of the community will

be stronger than that of the government. The most important step to follow is to involve the

community in a visioning process that could jump-start a bottom-up planning approach.

The existence of Santa Fe CBD has greatly compromised the environment and the well-

being of many neighborhoods, but many solutions are possible once the community sets its

goals and realizes what they will be fighting for.

The intention of this proposal is to seek some solutions that could tackle the existing

issues in order to promote sustainability by focusing on the safekeeping of the environment

and the economic development of the people of Santa Fe, while enhancing a sense of

community through increased responsibility.

A great deal of indifference exists on all sides: the Santa Fe CBD, people from the

town, and the government. Yet it is possible to create more involvement by hearing opinions

from all sides and creating grounds for discussion: the quality of life can be improved,

land can be remediated, and new jobs could be created. The only ingredient necessary to

achieve these goals is will power.

magueys and gabion walls non-edibles clean river bike path recreation

Sample Cross SectionActivating space, remediating land, improving quality of life

referenceS

Alvarez Laris. C (2009, Jul. 14) “Rinde frutos el rescate de un espacio muerto en la barranca de San Borja.” La Jornada. Http://www.jornada.unam.mx/2009/07/14/index.php?section=capital&article=033n1cap

ASERCA. Reporte de Precios Diarios de Hortalizas observados en diversas Centrales de Abasto. Http://www.aserca.gob.mx/sicsa/hortalizasnacional/hna_ca1.asp [Accessed: July 25,2010]

Balboa, B. (2010, Apr. 8) “Impulsa GDF agricultura urbana.” El Universal. Http://www.eluniversal.com.mx/notas/671573.html [Accessed: July 24, 2010])

Biografias. “Don Vasco de Quiroga.” Monografias.com.Http://www.monografias.com/trabajos58/don-vasco-de-quiroga/don-vasco-de-quiroga2.shtml [Accessed: June 3, 2010]

Blumenthal, U.J. D.D. Mara. “Reducing the Risks of Using Wastewater in Agriculture.” Urban Agriculture Magazine Vol. 3, RUAF Foundation. March 2001. Http://www.ruaf.org/node/147

Cano, D. (1999, Nov. 1) “Santa Fe, bujia de desarrollo.” El Universal.Http://www2.eluniversal.com.mx/pls/impreso/noticia.html?id_nota=3498&tabla=ciudad [Accessed: June 5, 2010]

Canedo Castro, M. “Conservacion y recuperacion de barrancas del poniente de la Ciudad de Mexico.” Instituto Nacional de Ecologia. Http://www.ine.gob.mx/descargas/dgipea/pon_barranca_poniente_cd_mex.pdf

Community Garden Guide Vegetable Garden Planning and Development. USDA Natural Resources Conservation Service. Http://plantmaterials.nrcs.usda.gov/technical/publications/newpublications/PMC_final_Garden%20guide%20Nov%2009.pdf

Davis, M. Planet of Slums. Verso New York, 2006.

Deutsche Bank Urban Age Award, Mexico City 2010. LSE Cities. Http://www.urban-age.net//news/updates/2010/07/dbua-awardwinner/

Dubbeling, M. “Financing Urban Agriculture.” Urban Agriculture Magazine Vol. 9. RUAF Foundation. April 2003. Http://www.ruaf.org/node/291

Evans, S. “The Productivity of Maguey Terrace Agriculture in Central Mexico During the Aztec Period.” Latin AmericanAntiquity. Vol.1, No.2, 1990. Http://www.anthro.psu.edu/faculty_staff/docs/Evans_Maguey_1990.pdf

Gaynor, T. (2004, Apr. 30) “Water Crisis as Mexico City Sinks Faster Than Venice.” The Independent. Http://www.mindfully.org/Water/2004/Mexico-City-Sinks30apr04.htm [Accessed: June 25, 2010]

Inaba, J. “Santa Fe: planning disaster or model of the future?” Archis. Vol. 4, 2004.

Llanos Samaniego, R. (2002, Oct. 1) “SERVIMET, paraestatal poco rentable.” La Jornada.Http://www.jornada.unam.mx/2002/10/01/037n1cap.php?origen=capital.html [Accessed: June 5, 2010]

Local Harvest. “Community Supported Agriculture.”Http://www.localharvest.org/csa/ [Accessed: Jul. 28, 2010]

Longarini, Maria Pia. Propuesta para un centro cultural en el nuevo desarrollo de Santa Fe. Tesis. Universidad Iberoamericana. México, D.F., 1999

Malkin, E. (2006, Mar. 16) “ Once built on a lake, Mexico City now runs dry.” The New York Times. Http://www.nytimes.com/2006/03/16/world/americas/16iht-mexico.html?_r=2

Martínez, Edith (2009, Jul. 20) “Barrancas de Santa Fe, “cloacas” de corporativos.” El Universal.Http://www.eluniversal.com.mx/ciudad/96517.html [Accessed: Jun. 15, 2010]

Modular Gabion Systems. “Gabion Walls Design.”Http://www.gabions.net/downloads/Documents/MGS_Design_Guide.pdf [Accessed: June 28, 2010]

Secretaria de desarrollo social y equidad para las comunidades.”Programa de agriculutra sustentable a pequena escala en la Ciudad de Mexico.” Proyectos especiales y vinculacion comercial.Http://www.sederec.df.gob.mx/proyectos_agricultura_sustentable.html [Accessed: July 25, 2010]

Secretaria de desarrollo urbano y vialidad. “Programa delegacional de desarrollo urbano, Alvaro Obregon 1997.”Http://www.seduvi.df.gob.mx/seduvi/cartografia/programasdelegacionales/aobregon.pdf

Secretaria del Medio Ambiente. “Mision, Vision y Objetivos.” Direccion de reforestacion urbana, parques y ciclovias. Http://www.sma.df.gob.mx/drupc/index.php?opcion=2 [Accessed: July 17, 2010]

Secretaria del Medio Ambiente. “Que son las areas verdes urbanas” Direccion de reforestacion urbana, parques y ciclovias. Http://www.sma.df.gob.mx/drupc/index.php?opcion=22 [Accessed: July 17, 2010]

Secretaria del Medio Ambiente. “Contexto Basico.” Sistema de informacion de barrancas.Http://www.sma.df.gob.mx/barrancas/index.php?op=06_definiciones [Accessed: July 19, 2010]

Sistema de informacion del desarrollo social. “Programa Delegacional de Desarrollo Urbano Alvaro Obregon.” Http://www.sideso.df.gob.mx/documentos/progdelegacionales/alvaro%5B1%5D.pdf [Accessed: July 8, 2010]

U.N. City Profiles. “Mexico City, Mexico.” United Nations Cyberschoolbus.Http://www.un.org/cyberschoolbus/habitat/profiles/mexico.asp [Accessed: June 25, 2010]

Zarandona, J.M. ““The Biography of Vasco de Quiroga (1470-1565), Bishop of Utopia, byBenjamín Jarnés (1888-1949)”, Spaces of Utopia: An Electronic Journal, nr. 3, Autumn/Winter 2006, pp. 69-83. Http://ler.letras.up.pt/uploads/ficheiros/3063.pdf