西北水电Issue(6)：12-17,6.DOI:10.3969/j.issn.1006-2610.2023.06.003
阶梯作用下土质边坡坡面流的水力学特性试验研究
Hydrodynamic Characteristics of Surface Flow on Soil Edge Slope under Stepped Action
摘要
Abstract
In order to explore the resistance law and yield of soil slope under stepped layout,and to reveal the hydraulic mechanism of soil erosion under stepped layout,apply the stepped energy dissipator to the slope flow,through the indoor drainage erosion test,the hydraulic characteristics under the condition of 4 flowrates(2、4、8、16 L/min),4 kinds of step stages(bare slope,first step,second step,third step)and 2 step heights(1、2 cm)at a fixed slope of 10°are studied.The results show that the average velocity is linearly related to the flow rate under the bare slope condition,and changes to a power function relationship after the step is arranged;when the flow process is constant,the more steps,the better the energy dissipation effect is;the average sediment yield of the second and third steps is less than 1 cm at the step height of 2 cm and the first step is opposite.Through the resistance analysis,it is concluded that step can increase the slope resistance,reduce the average velocity of runoff on the slope and increase the average water depth on the slope which alleviates the erosion effect of the runoff on the soil particles on the slope,and thus reduce the sediment runoff.关键词
坡面流/土壤侵蚀/工程措施/阻力系数/阶梯布置Key words
overland flow/soil erosion/engineering measures/resistance coefficient/stepped layout分类
水利科学引用本文复制引用
张崟崟,何贵平,雷孝章,陈前..阶梯作用下土质边坡坡面流的水力学特性试验研究[J].西北水电,2023,(6):12-17,6.基金项目
国家自然科学基金(41772321). （41772321）
