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| Rules of runoff and sediment generation under different measures in Fuxing watershed of the fifth sub-region in loess hully-gully region |
| Gao Lin |
| Water Conservancy Bureau of Anding District, 743000, Dingxi, Gansu, China |
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Abstract Based on Fuxing watershed of Anding district in the fifth sub-region of loess hilly-gully region, by the soil infiltration experimentation and runoff observation, the generation conditions of runoff and sediment of this region are studied, according to which, rational planning of the measures of soil and water conservation are made to reduce watershed erosion. Through the runoff plots observation, the priority of the underlying surface average runoff coefficients is barren slope>sloping field>timber forest>shrub forest>artificial grassland, the priority of the average sediment concentration is barren slope>sloping field>artificial grassland>timber forest>shrub forest. The priority of the infiltration ability of underlying surface is terrace>timberland>grassland>barren slope>town road. The most available and effective measures of increasing soil infiltration ability and regulate the runoff and sediment is changing micro relief, disposing the engineering measures of impounding the surface runoff and increasing artificial vegetation.
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Received: 09 December 2004
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