15 0Nature, food, and water
Iqu Edm
Sam
Sam
Sap
Sto
Por
Cut
Buc
Bam
Erz Phi
Kag
Ott
Edm
Relatively small
0.25-0.5
Small-medium
0.5-1
Intermediate
1-2
Medium-large
2-4
Quite large
4-8
Can
City population (million)
Bar Bra
Chi
Nai
Rom Te h
Cai
Lon
Sat
Ber
Ban
Kua
Nan Por
Nan
Number of major wetlands in urban region
00
20
40
60
80
90
2
4
6
8
10
12
17
Rah
Mega
8-16
Natural ve
getation cover alon
g lakeshores/ pondshores (%)
= Wetlands
= Lakeshores/
pondshores
Figure 6.7Major wetlands and natural lakeshores relative to city population size.
Major wetland is > approx. 4 km^2 ;anunusually long or large wetland is counted
twice. Wetlands include salt marsh, mangrove swamp, freshwater marsh, and
freshwater swamp, and are present along coasts, along rivers, and in depressions.
Lakeshores include major pondshores but exclude shorelines of reservoirs. Natural
lakeshore vegetation is the predominant land cover within approx. 1 km of a
shoreline. City population is in year 2000±2yr(Chapter5 and Table5.1). See
Figure 6.2 caption for city information.
Re-creation of wetlands, large and small, and their benefits is ahigh priorityin
urban regions. Especially suitable locations are at the base of certain hills and
mountains, on floodplains of rivers and streams, along coastal areas, and in the
outer urban-region ring. Tiny wetlands, some seasonal, may be produced at the
ends of stormwater drainage pipes.
Food inurban regions
Diversity and stability relative to agriculture
[F1]Cropland is the predominant land cover of the urban-region ring in half of
the regions(Color Figures2--39).