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| Calculation on soil erosion amount of main river basin in China |
| Li Zhiguang,Liu Bingzheng |
| The Mornitoring Center of Soil and Water Conservation,MWR,100053,Beijing,China |
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Abstract In order to evaluate soil erosion condition in China,the soil erosion amount should to be calculated.Based on the existing research,the sediment investigation and soil erosion controlling data are collected.With methods of sediment delivery ratio(SDR) and soil conservation,the annual average soil erosion amount of Yellow river basin and Yangtze river basin etc.9 large rivers basins are calculated,which is 5.31 billion tons.The results are compared with relative researches,and differences of sediment delivery ratio among basin regionalization are discussed.Which shows that the gross amount of soil erosion of Yangtze river basin is the largest,Yellow river basin are less than Yangtze river basin,then the turn is Huaihe river basin,Pearl river basin,Liaohe river basin,Songhuajiang river basin,the Minjiang river basin and the Qiantang river basin are the least.
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Received: 29 September 2005
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