13 landuse categories are related roughness length -------------------------------------------------------- landuse comment z0 -------------------------------------------------------- 1 Urban land 0.7 2 Agricultural land 0.1 3 Range land 0.1 4 Deciduous forest 1. 5 Coniferous forest 1. 6 Mixed forest including wetland 0.7 7 water, both salt and fresh 0.001 8 barren land mostly desert 0.01 9 nonforested wetland 0.1 10 mixed agricultural and range land 0.1 11 rocky open areas with low grow shrubs 0.05 12 snow and ice 0.001 13 rainforest 1.