yokohari_m_designing a sustainable future for suburban landscapes with rural greenspace
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Beyond the Edge: Australia's First National Peri-urban Conference La Trobe University October 2013TRANSCRIPT
Designing a sustainable future for
East-Asian peri-urban areas through
integrating rural greenspace
Makoto YOKOHARI The University of Tokyo
LaTrobe University, Bundoora, October 2013
Forest
(70%) Agricultural (12%)
Urban (8%)
370,000km2
1
10
100
1000
10000
0
10
20
30
40
50
60
70
80
2.27
169.6
2970.4
14.1
55.8 52.6 78.6
12.2
41.0
52.8 43.5
47.3 53.3
71.1 % hectors
Proportion of the land area for
agricultural uses
Average farmland size per farm
household
Small and labor intensive Japanese agriculture
Kanto, 70km N of Tokyo
http://mainichi.jp/select/jiken/graph/20110311/43.html
Great Hanshin Awaji Earthquake
January 17, 1995
Dead: 6400
Injured: 44000
September 1, 1923
Victims: 1,484,000
(58%)
Dead: 58,000
Burnt-down houses:
215,000(62%)
Burnt-down area:
3342ha(42%)
Great Kanto Earthquake
SOURCE: Global Seismic Hazard Assessment Program, United Nations Population Division
Seismic hazards and mega-cities
Flood in Bangkok Bangkok (2011), Beijing (2012), Manila (2012)…..
D
isast
er
risk
s
Comprehensive Risk index
by Munich Reinsurance Company
Paris
NYC
Tokyo
Paris 25
New York 42
Tokyo
710
30 London
Need to develop a sustainable and resilient
planning concept suitable for areas prone
to natural disasters
What kind of a planning concept?
Cologne, Germany
16th century
Paris, France
16th century
Cities in medieval Europe
Greater London Plan (1944) and the London Green Belt
by Patrick Abercrombie
Urban Rural
Juxtaposition of homogeneous land units
Urban Rural
Inter-unit functional relations
SOURCE: Global Seismic Hazard Assessment Program, United Nations Population Division
Seismic hazards and mega-cities
Loss of inter-unit
functional relationships
No way to survive?
Engawa Public? Private?
Container plants placed along roji (paths) in shitamachi Public? Private?
Agricultural lands in residential neighbor-hoods Urban? Rural?
Edo
Land use of Edo in the mid 19th century
More than 40% of the land area was for agricultural uses
Mixture of urban and rural land uses in the mid 19th century Edo
Night soil
Agricultural products Edo Farm
households
Edo: One of the most successful sustainable
cities based on the urban/rural land use mixture
1906
Kichijoji Mitaka
1937
Kichijoji Mitaka
Kichijoji Mitaka
1956
1998
Kichijoji Mitaka
Rural
Urban
What modern urban planning aimed…
Rural
Urban
What actually happened in Japan…
Chaotic?
Urban agricultural units providing food to neighboring urban land units
in emergency events
intera-urban
peri-urban
rural
international
intera-urban
peri-urban
rural
international
Food supply from intra- and peri-urban areas for redundant and thus resilient food supply
Agricultural lands with prime soil found in and around the urban core
railroad station
urban land use top
mid
low
Soil quality
Pe
rce
nta
ge
of a
gricu
ltu
ral la
nd
s w
ith
prim
e s
oil
an
d th
at o
f b
uilt
up
la
nd
s
Distance from the urban core (railroad station)
agricultural land with prime soil
built up land
R2 = 0.77
Multi-functionality / ecosystem services of agricultural lands in peri-urban areas
Bio-diversity conservation
Microclimate control (Reduction of summer heat)
Scenery conservation
Water retention
Heat
island
Farmland patches as “cool spots” in a residential neighborhood
Coverage ratio of paddy fields per unit (%)
Relationship between the coverage ratio of paddy fields and the
temperature differences between paddy fields and the urban core
2C
Peri-urban landscapes with various agricultural greens
A suitable planning concept for East-Asia
Who’s going to cultivate the lands?
0
5000
10000
15000
20000
25000
30000
35000
0
1000
2000
3000
4000
1990 1995 2000 2005
Declining agriculture in Tokyo
household household
Subsistence
(46.3%) Minor
Sub-major
Major 15-29
30-49
50-59
60-64
Over 65
(52.8%)
Farm households (Tokyo Met) Farm households (23 wards)
Farm operation (Tokyo Met) MAFF (2006) Age of farmers (Tokyo Met) MAFF (2006)
2005 2005
MAFF (2006) Tokyo Met(2006)
Estimated demographic transitions of Japan
More than 25% of the population become over 65 within 20 years
Past Future (estimate)
Transitions in the population of Japan : 1955 to 2055
Shrinking population, shrinking cities, and shrinking
economy
Urban residents retired at the age around 60 willing to practice agriculture as their second life
Let them come out from their backyard and collaborate with farmers
Agriculture experience gardens
Nerima, Tokyo
Instructed by local farmers
Local “urban” residents working, not volunteering, as
semi-professional farmers on suburban farmlands
Group A Group B, Group C
Group D
Group E
Group F
Community
garden
Professional
farming
small large
Group A
Group C
Group D
Group E
Group F
Community
garden
Professional
farming
Group B
Number of grown vegetables
small large
Size of farmland
Urb
an h
obby farm
ers
Pro
fess
ional fa
rmers
9.1
kg/m2/year
6.2
kg/m2/year
Peri-urban landscapes with a small-scaled mixture of fragmented urban and
agricultural land uses
May not be “beautiful” but “functional” to create sustainable and resilient cities
in East Asia
Thank you!