8076341 research paper earthquake bam

8/3/2019 8076341 Research Paper Earthquake Bam

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The Earthquake in Bam Combating Disaster with Sanitation

Class: Crisis, Vulnerability and Development

Instructor:Bruce Guenther

By Carsten Kaefert (3012875)


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Table of Contents

The Earthquake in Bam Combating Disaster with Sanitation......................................................1

Abstract.......................................................................................................................................3

Vulnerabilities.............................................................................................................................3

1. Location..............................................................................................................................32. Time....................................................................................................................................6

3. Construction and 4. Building Codes..................................................................................7Multi-Level Vulnerabilities Adding up.................................................................................10

Relief.........................................................................................................................................10

Restoring Sanitation a Sound Measure?...............................................................................10Lessons Learnt..........................................................................................................................13

Carsten Kaefert: The Earthquake in Bam Combating Disaster with Sanitation Page 2/14


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Abstract

In the early morning hours of December 26th 2003 an earthquake with a magnitude of 6.6

on the Richter scale shook the city of Bam in southeastern Iran. The incident killed more than

26.000 people and destroyed or damaged around 85 per cent of the buildings in Bam and the

surrounding villages, rendering a further 125.000 homeless. This article will show how an

impressive lineup of different factors for vulnerability turned a comparatively minor earthquake

into a major disaster. These factors range from high seismic activity in Iran to construction

improper for an area with such stresses and how the earthquake hit in the worst possible moment.

It will further analyze the relief efforts of the British NGO Oxfam, which focused on restoring

sanitation services in villages surrounding Bam. Their action is remarkable for its reliance on

locally available materials.

Vulnerabilities

Vulnerability to earthquakes is determined by a number of different factors. Considering

the comparatively low magnitude of the earthquake in Bam and the scale of the disaster it

triggered, it becomes obvious how central analysis of these vulnerabilities is to the understanding

of this case. Wisner et al. identify four key determinants to earthquakes:

1. Location

The location of the earthquake [] is of prime importance.1 This is rather obvious. The

location is of central importance on different scales: On a macro scale to assess the degree of

exposure for a country or region, on a meso scale to assess exposure within one country or region

1 Ben Wisner et al.,At Risk: Natural Hazards, people's vulnerability and disasters (London, New York: Routledge,

2004), 277.

Carsten Kaefert: The Earthquake in Bam Combating Disaster with SanitationVulnerabilities Page 3/14


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on the level of towns and villages and on a micro scale, dealing with risks on the level of single

buildings.2

All of these levels are relevant to the analysis of the case at hand. This is most obvious

when analyzing the macro scale: Iran is the seismically most active country in the world.

According to calculations undertaken by Asef it ranks first in regard to earthquake disaster

occurrences3 as well as to a criterion ICV integrating the country rankings in energy strike,

disaster occurences, fatalities, fatality burden (fatalities per capita) and fatality-energy index

(measuring the energy strike necessary to cause a fatality).4 Keeping in mind that the worst case

gets the lowest ICV, the margin by which Iran is more susceptible to earthquakes than the rest of

the world becomes strikingly clear seeing that its ICV of 8.6 is just little more than half that of

China (14.9), the second worst country in the ranking.5

On the meso scale, the specific vulnerabilities of the local economy come into play. Bam,

basically an ancient oasis, had two main sources of income, both of which were disrupted by the

earthquake: Agriculture and tourism. Dates and oranges were the main produce, irrigated by a

historic system of channels called ganats. This system was ruptured, additionally the natural

springs were devastated, effectively drying out the plants.6 But not only the next harvest was lost,

the last one also suffered, putting further strains on local livelihoods: Electricity lines were also

brought down, causing a year's stockpile of succulent Bam dates, housed in refrigerators, to spoil

2 Cf. ibid.

3 Cf. M.R. Asef, Modelling the elements of country vulnerability to earthquake disasters,Disasters 32(3)(2008): 488.

4 Cf. ibid. 489-491.

5 Cf. ibid. 491.

6 Cf. Integrated Regional Information Networks (IRIN), IRAN-IRAN: Special on Bam Three Months on, UN

Office for the Coordination of Humanitarian Affairs, http://www.irinnews.org/Report.aspx?ReportId=23658

(accessed 2008-11-09)

http://www.irinnews.org/Report.aspx?ReportId=23658http://www.irinnews.org/Report.aspx?ReportId=23658http://www.irinnews.org/Report.aspx?ReportId=23658http://www.irinnews.org/Report.aspx?ReportId=23658


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- the farmers had not yet been paid for their supplies. 7 Tourists were drawn to Bam because of

its more than 2000 years old citadel of Arg-e-Bam, which was the oldest clay-brick building in

the world. Eighty percent of it have been destroyed.8

7 Ibid.

8 Cf. Jean-Franois Pinera, Robert A. Reed and Cyrus Njiru, Restoring sanitation services after an earthquake:

field experience in Bam, Iran,Disasters 29(3) (2005): 223.


Illustration 1: Estimated population directly affected by the Bam earthquake. Map: USAID(http://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-

64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRN)
http://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRNhttp://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRNhttp://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRNhttp://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRNhttp://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRNhttp://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRNhttp://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRNhttp://www.reliefweb.int/rw/rwb.nsf/db900SID/SKAR-64GE3G?OpenDocument&rc=3&emid=EQ-2003-0630-IRN


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Two other interweaved factors differentiate the affected area on the meso scale: The close

proximity of the earthquake's epicenter to the city of Bam (compare illustration 1) and the fact

whether a person lives in the city itself or in one of the surrounding villages. Due to architectural

differences, both the city and the countryside had vastly different needs in respect to sanitation,

which will be discussed later on.9

Vulnerability to earthquakes also varies on a micro scale. This became apparent in Bam,

where buildings can be sorted into six categories with vast implications for their performance

during the earthquake.10 Analysis of the micro scale determinants thus is closely tied to the

quality of construction11 and therefore will be discussed in the corresponding chapter.

2. Time

The temporal characteristics of earthquakes are also crucial.12 Again, vulnerability is

temporally determined on three levels: frequency of earthquakes, which determines experience,

season or occasion of the earthquake and the time of day at which it hits. 13For Bam, all of the

dials were set for disaster: The city had not experienced any major quakes in modern times

(proven by the remarkably good state of the citadel before the earthquake),14 the earthquake hit in

the height of winter with temperatures well below zero degrees Celsius and stockpiles full of

dates15 and, perhaps most treacherous, struck at 05:28AM local time, when most of the people

were sleeping.16

9 Cf. Ibid. 226.

10 Cf. Farrokh Nadim et al., The Bam Earthquake of 26 December 2003,Bulletin of Earthquake Engineering2(2004): 131.

11 Cf. Wisner et al.At risk... 277.

12 Ibid.

13 Cf. Ibid.14 Cf. Pinera,Restoring... 223.

15 Cf. IRIN,IRAN-IRAN: Special...

16 Cf. BBC, Iran earthquake kills thousands, BBC, http://news.bbc.co.uk/2/hi/middle_east/3348613.stm

http://news.bbc.co.uk/2/hi/middle_east/3348613.stmhttp://news.bbc.co.uk/2/hi/middle_east/3348613.stmhttp://news.bbc.co.uk/2/hi/middle_east/3348613.stmhttp://news.bbc.co.uk/2/hi/middle_east/3348613.stm


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3. Construction and 4. Building Codes

Characteristics of buildings and unsafe structures also have a strong influence on

vulnerability to earthquake hazard.17 Nadim et al. identify six different categories of buildings

can within Bam and the surrounding areas, each with specific characteristics in regard to

earthquake vulnerability:

Type1Traditional adobe buildings: These buildings are made of series ofrectangular or square rooms next to each other, sharing a wall in between them. The

rooms usually are made of sun-dried clay brick load bearing walls, [...]The arched roof

is either dome or half-cylindrical shaped. The roofs are also made of sun-dried claybrick. The roof is covered with a layer of clay mud mixed with straw [...]. This type of

construction is common in rural Iran and has been around for centuries.[...]

Type 2 Unreinforced masonry buildings: these buildings are made of unreinforced

masonry load-bearing walls. The walls are commonly constructed with oven-driedbrick or sometimes with concrete blocks and are usually 3545 cm thick. [...]The roofs

and floors are typically a brick-filled steel beam system (jack arch system).[...]The

completed roof or floor is usually thick and heavy. [...]

Type 3 Simple steel or concrete frames with unreinforced masonry (brick) infill:These buildings have the main gravity load carrying systems made of simple beams

and columns. The roofs and floors are made the same way as in Type 2 construction.

[...] The walls are sometimes as thin as the width of a brick!

Type 4 Steel frames with steel shear bracing and unreinforced masonry (brick)infill: These buildings are similar to Type 3 but with steel X-bracing in one or two

directions for carrying lateral loads[...]

Type 5 Moment-resisting frames (concrete or steel): These buildings are designed

such that the steel or concrete frames transfer the lateral loads from floors and roof tothe foundation. The roof and floors are made the same way as in Type 2 construction.

[...]

Type 6 Steel frame with metal roof: These buildings are usually one story with light

(corrugated) steel or aluminium sloped roof and used in industrial and commercialfacilities.[...]

(accessed 2008-11-09)

17 Wisner et al.At risk... 277.



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Most of the buildings seen in Bam were of the above types or a variation of them. Notethat most of the building types described above, except for Type 6 construction, have

thick heavy roofs.[...]18

It does not take much imagination or engineer's skills to figure out that top-heavy buildings

from weak materials perform suboptimally in case of an earthquake. Nadim et al. back up this

assumption with empiric data taken at several spots around town, including the following:

Stop 6 Basij Rotary.

Near total damage. All traditional adobe building types (Type 1) collapsed. Most Type2 buildings collapsed. No unsupported walls survived. Heavy damage to steel frame

with metal roof building. Severe damage to steel frame buildings. Collapsed

telecom/radio steel tower.19

One might assume that this is first and foremost a problem of old, traditional non-

engineered housing. It is not, as Nadim et al. witness:

Stop 10 Razmandegan Subdivision-Shahrak Razmandegan. About 150 to 200 newer

homes (about 5 years old) were located in this new development. Most, if not, all hadcollapsed. The residential units were of Type 2 construction, some with an L-shaped

plan, and mostly one storey.[...] Although the brick wall mortar looks good, it was not

strong enough to withstand large lateral force induced due to heavy roof.20

The large scale collapse of new housing leads to the question how this was possible.

Should there not have been protective measures?

18 Nadim et al., The Bam... 133.

19 Ibid. 135.

20 Ibid. 137.



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Protective measures include [] policies that officials have taken [] to reduce seismic

risks.21 Such policies include, for example, aseismic building codes, which have proven highly

successful in the past. The Loma Prieta earthquake, for example, struck the densely populated

San Francisco Bay region with a magnitude of 7.1 on the Richter scale in 1989, but came at a

cost of human life several orders of magnitude lower only 57 casualties could be directly

linked to the earthquake.22 Although protection is obviously possible, in 2003 Iran had neither

strict enough regulations in place nor were the existing regulations enforced.

Illustration 2 clearly shows

the inadequacy of the building

code in effect in Bam at the time

of the earthquake, as the forces

unleashed even by this rather

average earthquake exceeds the

minimum of what a building has to

be able to take without

disintegrating. Still, had the

buildings been up to at least this

minimal standard, a properly

designed and constructed structure based on the code requirements would most likely have

survived the event without collapsing.23

21 Wisner et al.At risk... 278.22 Cf. Jason E. Eberhart-Phillips et al., Profile of Mortality from the 1989 Lorna Prieta Earthquake using Coroner

and Medical Examiner Reports,Disasters 18(2) (1994): 160.

23 Nadim et al., The Bam... 129.


Illustration 2: Forces of the Bam earthquake compared to

building code requirements. (Source: Farrokh Nadim et al.

2004, 130)


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Multi-Level Vulnerabilities Adding up

Having shown that Bam was exceptionally vulnerable to earthquakes on virtually all levels,

that all of the determinants there pointed towards disaster, it becomes less surprising that an

earthquake of such modest magnitude caused such complete devastation. This was one disaster

waiting to happen.

Relief

The widespread destruction of the better part of buildings left the population of Bam and

the surrounding villages virtually helpless. As the Iranian government struggled with the task of

providing support to its affected citizens,international aid became more and more important

(welcome, as it had to overcome quite some reservations).24One of the first organizations on the

ground was Oxfam,25 which soon focused on restoring sanitation services.

Restoring Sanitation a Sound Measure?

Although it was winter when the earthquake hit, the temperatures were expected to rise

significantly just shortly after, thus creating a higher need for sanitation such as showers. 26

Oxfam took this task in the area of eleven villages in the outskirts of the city, as this was the

ground it was assigned to by the local crisis management authorities.27

This differentiated the practices of Oxfam very much from those of the organizations

active within the city's boundaries for a variety of reasons:

24 Cf. Erich Wiedemann, Groer Satan im Reich des Bsen,Der Spiegel2 (2004): 98.25 Cf. Pinera,Restoring... 224.

26 Cf. Ibid. 227.

27 Cf. Ibid. 223.

Carsten Kaefert: The Earthquake in Bam Combating Disaster with SanitationRelief Page 10/14


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The magnitude of destruction was lower. Although still between twenty and fifty per cent

of the buildings were destroyed, in some parts of the city destruction was total.28

Due to a higher prevalence of outdoor toilets, more of those made it through the

earthquake in usable condition.29

The different social fabric lead to another prevalence of sanitary installations before the

hazard with way fewer people having showers of their own. However, people were used to clean

themselves in their closed-up yards, which now did not offer the needed privacy anymore. 30

Building material and supplies were easier available than within the city.31

These differences led to a quite unique approach to the task of restoring sufficient

sanitation capacities. Most obvious is the decision to rely on locally available materials and

workforce by choosing a construction that could by completed by local masons with readily

available material: The toilets and showers were slated to be made with relatively thin walls from

clay bricks (which is the common building material in the area) with lightweight roof

constructions.32 Due to mostly inside toilets and a higher prevalence of showers, agencies within

the city relied more upon ready-made cubicles, as these helped to satisfy the bigger demand

faster.33

The measures taken by Oxfam can be assessed on a variety of levels. These are:

28 Cf. Ibid. 224.

29 Cf. Ibid. 226.

30 Cf. Ibid.31 Cf. Ibid. 227.

32 Cf. Ibid. 230-231.

33 Cf. Ibid. 224-225.

Carsten Kaefert: The Earthquake in Bam Combating Disaster with SanitationRelief Page 11/14


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Cost and work management:34 Oxfam just provided all the necessary materials (except

clay) and wages for skilled workers. The sites for communal bathrooms were chosen by the local

communities, as well as the beneficiaries were responsible for the upkeeping of the facilities and

provided unskilled work to their erection.35Thus local ownership was guaranteed.

Efficiency:36 Although at first supplies were feared to be a problem, they were much

less so than labor. Recruiting a sufficient number of masons in the villages proved to be a

challenge threatening the efficiency of the operation. Similarly determining the efficiency was

the cooperation (or lack thereof) with local authorities. Although around one third of all the units

were under construction by the end of February, none were completed before April.37 So

efficiency lacked in terms of being able to provide hygienic sanitary conditions before the start of

the hot season in March.38

Fulfillment of the SPHERE charter.39The SPHERE charter justifies the construction of

showers by two statements: It says that sanitation programs should aim to establish 'conditions

that allow people to live in good health, dignity, comfort and security' 40 as well as it specifies

the amount of water assigned to beneficiaries to be culturally sensitive.41

Lessons Learnt

This disaster and the response to it teach us lessons on two levels: ex ante and ex post. For

prevention, mainly a stricter and better enforced building code come to mind. Nadim et al.

34 Ibid. 231.35 Cf. Ibid.

36 Ibid. 231.

37 Cf. Ibid. 233.

38 Cf. Ibid. 227.39 Cf. Ibid. 233.

40 Ibid. 233.

41 Cf. Ibid.

Carsten Kaefert: The Earthquake in Bam Combating Disaster with SanitationLessons Learnt Page 12/14


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present a whole list of possible structural and architectural improvements based upon the patterns

of destruction they observed.42

But also in respect to recovery after disaster valuable lessons have been learned. The

concept of building upon local supplies and craftsmanship proved right, as it was both

reasonably effective and included the local populus. Another lesson that can be taken is that

repairing installations is more often a viable choice than not.43

42 Cf. Nadim et al., The Bam... 139ff.

43 Cf. Pinera,Restoring... 235.



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Bibliography

Asef, M.R., Modelling the elements of country vulnerability to earthquake disasters,

Disasters 32(3) (2008).

Eberhart-Phillips, Jason E. et al., Profile of Mortality from the 1989 Lorna Prieta

Earthquake using Coroner and Medical Examiner Reports, Disasters 18(2) (1994).

Integrated Regional Information Networks (IRIN), IRAN-IRAN: Special on Bam Three

Months on, UN Office for the Coordination of Humanitarian Affairs,

http://www.irinnews.org/Report.aspx?ReportId=23658 (accessed 2008-11-09).

Nadim, Farrokh et al., The Bam Earthquake of 26 December 2003,Bulletin of

Earthquake Engineering2 (2004).

Pinera, Jean-Franois, Reed, Robert A. and Njiru, Cyrus, Restoring sanitation services

after an earthquake: field experience in Bam, Iran,Disasters 29(3) (2005).

Wisner, Ben et al.,At Risk: Natural Hazards, people's vulnerability and disasters.

London, New York: Routledge, 2004.


8076341 research paper earthquake bam

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