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| Water reduction norm of soil and water conservation in Yellow River basin |
| Chang Dandong, Diao Mingjun, Wang Lixian |
| College of Soil and Water Conservation of Beijing Forestry University, 100083, Beijing, China |
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Abstract Annual runoff amount of river basin is a significant basis of water resources evaluation and its allocation in reason, while water reduction norm of soil conservation is a foundation of estimating influences of soil and water conservation on annual runoff amount of river. On the basis of comprehensive analysis on present achievements of water reduction function and environment conservation regionalization of upper and middle reaches of Yellow River, adopting method of integrated management of small watershed, water reduction norms of soil and water conservation of regions are calculated, which are 245.5m3/hm2 in loess hilly region, 118.5m3/hm2 in loess plateau and hilly region and 471.9m3/hm2 in earth-rocky mountainous region respectively. At last, reasonable approaches of inquiring into water reduction amount are probed into.
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Received: 15 March 2005
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