摘要
由于研究方法和手段的差异，已往黄河中游小流域的泥沙来源研究均以地貌部位确定泥沙来源。根据坡面水下沟的“净产沙”原理，在分析黄河中游地区典型小流域坡沟侵蚀关系与产沙机理的基础上，运用成因分析法的概念分析和确定了小流域的泥沙来源，结果表明：在体现不同地貌部位在小流域汇流与产沙中的侵蚀作用机理方面，也就是从不同地貌部位泥沙产生的根源上看，黄河中游小流域的泥沙主要来自坡面。证实了在黄河中游地区“治坡为主，坡沟兼治”治理方针的正确性。
The erodible characteristic of slope coming water and the relationship of slope gully erosion are discussed based on data of runoff and sediment yield in the loess areas of the middle Yellow River basin, and the source of sediment on typical small catchment is determined based on concept of net increment of sediment yield as slope coming water with sediment concentration and applying analytical method of formation at different position in a catchment.The results showed that sediment at a small catchment in the middle Yellow River basin is mainly come from slope, the sediment source from slope are about 55%, 60%, 78% and 85% of total sediment load of small catchment due to effect of slope coming water by the Yangdaogou,Wangjiagou, Jiuyuangou and Nanxiaohe gullys respectively.
基金
国家自然科学重大基金资助项目
关键词
坡沟侵蚀
泥沙来源
黄河
产沙机理
成因分析法
small watershed
\ slope gully erosion
\ sediment sources
\ the middle reaches of Yellow River
