... oftechniques for: 82 GIS FOR WATER RESOURCES AND WATERSHED MANAGEMENT © 20 03 Taylor & FrancisChapters 1, 3, 5 & 6 © American Water Resources Association; Chapter 13 ©Elsevier Science; Chapter ... for cultivation. Land-use characteristics were mapped separately for valley bottoms, valley fringes, and up-88 GIS FOR WATER RESOURCES AND WATERSHED MANAGEMENT © 20 03 Taylor & FrancisChapters ... farmlands 57,853 3.8 148,609 10.3 22 1,399 7.1 2 scattered farmlands 547,694 35.7 4 92, 119 34 .2 1,099, 828 35 .2 3 savanna vegetationb 23 3, 120 15 .2 155,091 10.8 407, 026 13.04 wetlands/marshland 129 ,808...