摘要
本文利用人工模拟降雨试验,根据水力学理论,统计分析了黄土高原坡面超渗径流特征。各因素对形态特征参数雷诺数具有显著性差异,对流态特征参数弗汝德数造成的差异不显著。由于雨滴打击作用,径流在直线坡、锄耕地和顺坡耕作水平下,形成"扰动层流"。从流态上判别:锄耕地、直线坡多属于缓流;顺坡耕作易形成急流。等高垄作则具有明显的紊流和急流特征。
This paper analyzed characteristics of slope runoff over infiltration on loess plateau, which applied for simulative rainfall experiment and employed hydraulic theories. While Re values held significant difference among factors, Fr values didn't hold the feature. Runoff of linear slope, hoe-cultivated slope and farming along slope formed 'agitated laminar' flow because of raindrop's hitting action. According to flowing state,linear slope and hoe-cultivated slope were mainly attributed to slow flow, farming along slope was likely to occur rapids flow.Farming along contour was of obvious unsticking flow and rapid flow.
出处
《土壤通报》
CAS
CSCD
北大核心
2004年第6期780-784,共5页
Chinese Journal of Soil Science
基金
国家"九五"重点科技攻关计划项目(96-004-05-07)
陕西省"十五"科技攻关项目(2001K01-G1Z-03)
关键词
黄土高原
超渗径流
降雨
水力学
loess plateau
runoff over infiltration
flowing pattern
flowing state
