Study on Resistance Characteristics for Overland flow under Different Density of Flexible Vegetation Cover
ZHAO Lu
SUN Juying
ZHANG Lu
PAN Xueqian
LEI Xiaozhang
Abstract：Based on the method of integrating theoretical analysis with experiment,a series of overland flow experiments were carried out to study the influence of three different coverage and two slope groups of the perennial ryegrass on resistance characteristics of overland flow.The interaction between the form of flexible vegetation and flow was primarily discussed under certain conditions.The experiment results showed that Manning coefficient increased and then decreased and increased finally as the Reynolds number increased with surface coverage of vegetation;Manning coefficient did not increase as vegetation density increased;when the slop was 5°,Manning coefficient decreased with Froude number by good power function,but 10°did not.With the same Froude number,Manning coefficient decreased with the slope increases.
Keywords：overland flowthe density of vegetationresistance characteristicsManning coefficient
Publication Date：2017-01-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：5( 101-105 )