Research methods and results analysis of sediment delivery ratio
LI Lin-Yo-；Jiao-Ju-Yang-；Chen-Yang
1.Institute of Soil and Water Conservation,CAS & MWR,Northwest A & F University,712100,Yangling,Shaanxi;2.Pearl River Institute of Hydraulic Research,510635,Guangzhou;3.College of Water Resources,Shenyang Agricultural University,110161,Shenyang: China
Abstract：Sediment delivery ratio(SDR) is an index that reflects the transport capacity of eroded sediment in the watershed,and has both scientific significance and application values for benefit evaluation on sediment reduction of soil and water conservation and decision-making of watershed management.This paper summarizes and analyses the research methods and results of the SDR at home and abroad.There are two methods in the SDR research: direct calculation based on the definition of SDR and model calculation based on SDR models.The key of the direct calculation is how to obtain soil erosion amount,while the calculation models mainly includes three kinds at present: factor empirical model,distributed model and physical model.Based on the summarization and review of the soil erosion amount obtaining methods and existed SDR models,the research results of SDR in Yellow River Basin,Yangtze River Basin,other domestic regions,and some regions abroad are analyzed,and the problems research direction of SDR are discussed.
2009, Vol. 7 
