Table
8.1
Case study evaluation of urbanization models using two attributes in two urban regions. Mosaic sequence maps for Mexico City and
Nant
es (Figures
8.3
and
8.4)a
re
superimposed on Color Figures
22
and
25,andthenumberofbiodiversitys
ites and length of rivers/major
streams covered by development is recorded for each of the three time stages portrayed by a model. For each attribute in each region the modelsare rankedfrombesttoworst(
1
to
4 )b
ased on the amount (low to high) of an attribute affected by urbanization, i.e., covered by development.
Concentric-zones model
Satellite-cities model
Transportation-corridors
model
Dispersed-sites model
Attribute measured
Stag
es
Stages
Stages
Stages
Urban region
1st
2nd
3rd
Total
1st
2nd
3rd
Total
1st
2nd
3rd
Total
1st
2nd
3rd
Total
Biodiversity sites (number affected by urbanization)
Mexico City
1
2
5
8
1
0
1
2
1
2
5
8
3
4
3
10
Model ranking
2.5
1
2.5
4
Nantes, France
0
1
2
3
0
0
0
0
0
0
2
2
2
1
3
6
Model ranking
312
4
Rivers/major streams (km length affected by urbanization)
Mexico City
0
0
0
0
23
11
14
48
1
1
11
13
0
0
2
2
Model ranking
143
2
Nantes, France
5
10
9
24
6
4
4
14
0
.5
.5
1
8
5
15
28
Model ranking
321
4