论文部分内容阅读
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。
Based on the theory of hydraulics, this paper made a statistic analysis of the characteristics of the excess flow and runoff on the Loess Plateau by using artificial simulated rainfall test. The Reynolds number of the morphological characteristics of each factor has a significant difference, the flow characteristics of the Froude number caused no significant difference. Due to the raindrop strike action, runoff forms a “disturbed laminar flow” at the straight slope, hoe arable land and downslope farming level. Judging from the flow state: hoe arable land, linear slope mostly belongs to slow flow; slope farming easy to form a rapid flow. Contour ridge has obvious turbulence and rapids characteristics.