论文部分内容阅读
1 前言2 观测地点及测定方法3 管流观测结果3．1 办事处实验林3．2 定山溪流域试验地3．2．1 简易壕沟长为1m的壕沟内土管密度为:上部壕沟内2.7个/m;下部壕沟内6.3个/m。分布的小流量土管数量更多。自简易壕沟内流出的水量遵从达西定律的占27.7%,7条大流量管流占32.9%,推定小流量管流占39.4%,大小管流流量合计占全部流量的72.3%。7条大流量管流流速较快,为0.733~0.896cm/s。土管的断面积由其出口处的实测流量除以实测流速求得。因为壕沟
1 Preface 2 Observations and Methods of Measurement 3 Pipeline Observations 3.1 Experimental Forest in Offices 3.2 Experimental Site in Dingshan Creek Basin 3.2.1 Simple Trenches The density of soil pipes in a trench with a length of 1 m is as follows: 2.7 in the upper trenches / M; the lower part of the trench 6.3 / m. Distribution of small quantities of soil pipe more. Flows from simple trenches accounted for 27.7% of Darcy’s law, seven large flow tubes accounted for 32.9%, small flow tube estimates accounted for 39.4%, the size of the total flow of tube flow accounted for 72.3% of the total flow. Seven large flow tube flow faster, 0.733 ~ 0.896cm / s. The cross-sectional area of the soil tube is determined by dividing the measured flow at its outlet by the measured flow rate. Because of the ditch