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| Comparison of storm runoff and sediment yield between two different managed small watersheds in the Loess Plateau |
| Wang Ruifang, Huang Chengzhi, Dong Yuting |
| Tianshui Soil and Water Conservation Station, Yellow River Conservancy Commission, 741000, Tianshui, Gansu, China |
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Abstract On the basis of observation from paired-watersheds, named Qiaozidong and Qiaozixi wateshed, the characteristics of rainfall, runoff and soil erosion between the paired watersheds were studied. The results show that Qiaozidong watershed with better soil and water conservation measures coupled with improved vegetation cover has, on the premise of the same storm event, demonstrated by strong capacity of reducing flood peak flow and sediment yield. It was found that the runoff production of Qiaozidong watershed was decreased by 13336m3/km2, and sediment yield descended by 8534t/km2, compared with those of Qiaozixi watershed. Furthermore, the module of soil erosion on Qiaozixi watershed was 3.5 times of that on Qiaozidong watershed. In generally it is supposed that the effects on runoff and sediment yield reduction were mainly attributed to the well functionally soil and water conservation measures, as well as the increased vegetation cover.
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Received: 18 July 2005
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