水土保持学报2001，Vol.15Issue(1)：54-57,125,5.
细沟侵蚀过程与细沟水流水力学参数的关系研究
Research on Rill Erosion Process and Rill Flow Hydraulics Parameters
摘要
Abstract
A dual-box system, consisting of a 2-m-long feeder box and a 5-mlong test box with 150 gradient was used to quantify effects of run-on water and se diment on rill erosion process at down-slope section and rill flow hydraulics parameters, as well as relationship of rill flow hydraulics parameters and sedim ent delivery by rill erosion. The results showed that detachment-transport was dominated in rill erosion processes, runoff from up-slope always caused addit ional sediment delivery in the rill box, the additional sediment delivery increa sed with a decrease of sediment concentration in runoff from the feeder box and an increase of rainfall intensity. Up-slope runoff discharging into rill chann el at down-slope section or an increase of rainfall intensity resulted in that rill flow shifted from stratum flow into turbulent flow. Runoff from up-slope had an important effect on rill flow hydraulics parameters, such as rill flow v elocity, Reynolds number and Daycy-weisbach coefficient. The relation between rill flow hydraulics parameters and additional sediment in rill channel caused b y up-slope runoff was analyzed. And a statistic model among the additional sed iment in rill channel and relative increment of rill flow velocity and Reynolds number, as well as relative decrement of rill flow Daycy-weisbach coefficient was established.关键词
上方来水来沙/侵蚀-搬运/细沟侵蚀/细沟水流/水力学参数分类
农业科技引用本文复制引用
肖培青,郑粉莉,张成娥..细沟侵蚀过程与细沟水流水力学参数的关系研究[J].水土保持学报,2001,15(1):54-57,125,5.基金项目
国家自然科学基金资助项目 （）
