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Position: Home > Articles > Modeling Sediment Delivery Ratio of Single Rainfall Events in Hilly-Gullied Loess Region Based on Hydrologic Elements Bulletin of Soil and Water Conservation 2011,31 (5) 28-31

基于水文要素的黄土丘陵区次降雨泥沙输移比模型

作  者：
王玲玲;姚文艺;王昭艳;杨吉山
单  位：
中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室;黄河水利委员会黄河水利科学研究院;中国水利水电科学研究院
关键词：
泥沙输移比;次降雨;径流侵蚀力;黄土区
摘  要：
以黄土丘陵区桥沟小流域为研究对象,利用该流域不同地貌部位的野外径流场及沟道水文站网观测资料,探讨了小流域次暴雨泥沙输移比的时空变化特征。依据相关分析法,确定了影响桥沟流域次降雨泥沙输移比的主导因素。结果表明,径流侵蚀力、泥沙相对重率、降雨特性、土壤前期含水量是影响桥沟流域次降雨泥沙输移比的主导因子。采用统计回归方法,建立了黄土丘陵区桥沟流域次降雨泥沙输移比模型。
译  名：
Modeling Sediment Delivery Ratio of Single Rainfall Events in Hilly-Gullied Loess Region Based on Hydrologic Elements
作  者：
WANG Ling-ling1,2,YAO Wen-yi1,WANG Zhao-yan3,YANG Ji-shan1(1.Yellow River Institute of Hydraulic,YRCC,Zhengzhou,He'nan 450003,China; 2.State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau,Institute of Water and Soil Conservation,Chinese Academy of Sciences and Ministry of Water Resources,Yangling, Shaanxi 712100,China;3.China Institute of Water Resources and Hydropower Research,Beijing 100044,China)
关键词：
sediment delivery ratio;single rainfall;runoff erosivity power;hilly-gullied loess region
摘  要：
Qiaogou watershed,located in the hilly-gullied loess region,was chosen as the study area.Based on the observed data from the natural runoff plots and hydrological stations built on different landscape positions,the temporal and spatial characteristics of sediment delivery ratios(SDR) under single rainfall events were discussed.The dominant factors affecting the SDR were determined by correlation analysis.The results show that the antecedent soil moisture content,rainfall characteristics,runoff erosivity power and sediment relative bulk density were the main factors controlling the SDR in this area.Using these dominant elements,a sediment delivery ratio formula was built by nonlinear regression analysis.

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