水土保持通报2012，Vol.32Issue(6)：38-42,5.
不同人工糙率床面水力学特性的试验研究
Hydraulic Characteristics of Artificial Surfaces with Different Roughness
摘要
Abstract
The variations of hydro-dynamic parameters(Reynolds number,Froude number,average flow velocity,water depth and resistance coefficient) of overland flows were characterized under different flow discharge,slope gradient and roughness based on flume experiments.The research results indicated that Reynolds number,Froude number,average flow velocity,water depth and resistance coefficient of the overland flows increased with flow discharge for the artificial beds with same roughness and slope gradient.Under the conditions of same gradient and flow discharge,Reynolds number,Froude number and average flow velocity of the overland flows decreased with increasing roughness,while resistance coefficient and flow depth increased.Flow discharge and slope gradient were found closely correlated with the hydraulic parameters such as average flow velocity,water depth,and resistance coefficient,which could be well described by simple power functions.Furthermore,the influences of flow discharge were dominant.关键词
坡面流/糙率/流态/流速/水深/阻力系数Key words
overland flow/roughness/flow regime/flow velocity/water depth/resistance coefficient分类
农业科技引用本文复制引用
翟艳宾,吴发启,王健,尹武君..不同人工糙率床面水力学特性的试验研究[J].水土保持通报,2012,32(6):38-42,5.基金项目
国家自然科学基金项目“黄土坡耕地地表糙度对产汇流的影响研究” （）
