摘要
本文根据天然降雨径流小区资料,研究了陕北黄土丘陵区坡面不同侵蚀带的产沙分配,以及降雨因素对其影响.结果表明,细沟浅沟侵蚀带是沟间地泥沙的主要来源;各侵蚀带产沙量随雨量、雨强的变化趋势一致,但在不同强度级降雨下,各侵蚀带产沙盈随雨强变化的幅度相差很大.经分析得出了各侵蚀带侵蚀量与30min最大雨强的关系模型,提出了不同侵蚀带侵蚀发生的临界雨量和临界雨强值,以及反映雨强影响作用规律的两个特殊雨强值.
Based on the data obtained from natural runoff plots, the sediment distribution on different erosion belts of slope and. the impacts of rainfall were studied. Results show that the rill-shalow gully erosion belt is a main sediment source within intergully slope. The erosion amount from each belt all changes with rainfall volume and rain intensity in same tendency, but the amplitute of change is very different for each belt. As a result of analysis, the statistic models for the relationship between the erosion amount from each belt and I30 are established. Meanwhill, the critical rainfall and rain intesity value for different belts, as well as two special rain intensity reflecting rain intensity impact on erosion are introduced.
出处
《泥沙研究》
CSCD
北大核心
1991年第4期39-46,共8页
Journal of Sediment Research
