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。
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.
出处
《水土保持通报》
CSCD
北大核心
2011年第5期28-31,共4页
Bulletin of Soil and Water Conservation
基金
黄土高原土壤侵蚀与旱地农业国家重点实验室基金项目"黄土丘陵区小流域次暴雨泥沙输移过程研究"(10501-235)
黄河水利科学研究院基本业务费专项"黄土高原分布式水沙模型的尺度转换研究"(JBYWZ2010-19)
水利部公益性行业科研专项"黄土高原多沙粗沙区产水产沙数学模型研究与应用"(200701035)
关键词
泥沙输移比
次降雨
径流侵蚀力
黄土区
sediment delivery ratio
single rainfall
runoff erosivity power
hilly-gullied loess region
