摘要
基于对已有泥沙输移比相关研究的总结,探讨了泥沙输移比的定义和作用。根据泥沙输移比的内涵,结合影响泥沙输移比的因素,分析了泥沙输移比的计算方法。基于国内外泥沙输移比计算的实例,总结了主要流域泥沙输移比数值的变化范围。目前泥沙输移比计算仍以对流域侵蚀和输移数据的统计分析为主,由于对泥沙输移比的理解有所不同,不同研究获得的计算公式形式多样,且往往针对具体的研究区域,适用性差。如何构建适用局部较大区域的泥沙输移比计算公式仍是今后需要解决的难题之一。
With the existing research achievements on sediment delivery ratio （SDR）, the authors discuss the definition of SDR and its roles in water and sediment research. According to the content of the definition of SDR, with the various impact factors of SDR, several methods of calculating SDR are reviewed. Based on the domestic and international examples of numerical calculation on SDR, the values of SDR in major watersheds are summarized. At present, mathematical statistical analysis on watershed erosion and transport data is still a dominating approach to SDR formulation. Due to different understanding of SDR, the formulas for SDR are in different forms and often established for the specific research areas, but cannot be applied to the other areas. How to establish a formula for SDR, which will be suitable for a larger area, is still a major challenee in the future.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
2012年第4期685-694,共10页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家重点基础研究发展计划(2007CB407202)资助
关键词
流域
侵蚀量
沉积量
泥沙输移比
watershed
erosion amount
sediment yield
sediment delivery ratio
