水利学报Issue(10)：1225-1232,8.
泥沙输移比尺度依存及分形特征
Dependence of sediment delivery ratio on scale and its fractal characteristics
摘要
Abstract
Sediment delivery ratio (SDR) is a link to connect surface erosion and gully sediment delivery, which is also an indicator to demonstrate the capacity of sediment erosion and delivery of a certain basin. Hence, SDR is usually recognized as a helpful factor when evaluating sediment reduction effects due to soil and water conservation management and making policy-decision on ecological construction. Based on a sys-tematic review on SDR studies at home and abroad during the last 50 years, this paper analyzed and dis-cussed whether SDR has dependence characteristics on scale and its fractal characteristics or not. It was con-cluded that (1) the definition of SDR formula has embedded in the characteristic of scale;(2) SDR in differ-ent watersheds at home and abroad showed correlations with certain temporal and spatial scales, which means SDR is depended on its scale;(3) SDR could be quantitatively expressed and be scaled using fractal dimension under a certain temporal and spatial scale. The authors found that values of SDR and fractal di-mension (D) at 1km2 typical watershed unit were approximately equal to the SDR and D coefficients in corre-sponding scaling models. This paper pointed out that the calculation and study on SDR can’t be correct with-out considering its scale dependence. It is a valid and useful approach to construct SDR scaling models by using fractal dimension,which could be an interesting research topic regarding on SDR scaling in the future.关键词
泥沙输移比/土壤侵蚀量/输沙量/尺度/典型流域单元Key words
sediment delivery ratio/soil erosion/sediment delivery/scale/typical watershed unit分类
建筑与水利引用本文复制引用
张晓明,曹文洪,武思宏,秦伟..泥沙输移比尺度依存及分形特征[J].水利学报,2013,(10):1225-1232,8.基金项目
国家自然科学基金项目（51009154，31200535）；流域水循环模拟与调控国家重点实验室自主研究课题（泥ZY1304）；国家自然科学基金创新研究群体基金项目 （）
