Table 5 Impact of land use evolution on sediment sources in Yan'gou Watershed
Land use scenario | Slope grass+shrub % | Steep Slope grass+shrub % | Slope farmland % | Unused % | Road % | Total sediment t | Sediment modulus t·km-2 | Reduced rate % |
|---|---|---|---|---|---|---|---|---|
Year 2000 | 3.6 | 15.3 | 50.8 | 19.3 | 11.0 | 4393 | 94 | |
Year 2005 | 8.2 | 18.5 | 6.5 | 24.5 | 42.3 | 3636 | 78 | 17.3 |
Third pattern: | 11.5 | 26.1 | 9.2 | 34.5 | 18.7 | 2583 | 55 | 41.2 |