文章摘要
马晨雷, 戴翠婷, 刘窑军, 周怡雯, 王天巍, 李朝霞, 占顺, 胡宇潇.砾石覆盖对紫色土坡面流水动力学参数的影响[J].水土保持学报,2019,33(6):150~155,161
砾石覆盖对紫色土坡面流水动力学参数的影响
Effects of Gravel Covering on Hydraulic Characteristics of Slope Flow on Purple Soil
投稿时间:2019-04-26  
DOI:10.13870/j.cnki.stbcxb.2019.06.021
中文关键词: 紫色土  坡面流  砾石覆盖  水动力学参数  土壤侵蚀
英文关键词: purple soil  slope flow  gravel covering  hydraulic characteristics  soil erosion
基金项目:国家自然科学基金项目(41571266)
作者单位E-mail
马晨雷1, 戴翠婷1, 刘窑军2, 周怡雯1, 王天巍1, 李朝霞1, 占顺1, 胡宇潇3 1. 华中农业大学水土保持研究中心, 武汉 430070

2. 江西省水土保持科学研究院
, 南昌 330029

3. 秭归县水土保持试验站
, 湖北 秭归 443600 
zxli@mail.hzau.edu.cn 
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中文摘要:
      地表砾石覆盖可以促进降雨入渗,减少土壤侵蚀。然而,砾石覆盖对紫色土坡面流的影响尚缺乏深入研究。通过室内模拟冲刷试验,在3个冲刷流量(2,4,6 L/min)下,研究不同砾石覆盖度(0,10%,20%,30%和40%)对紫色土坡面流水动力学特性的影响。结果表明:(1)随着砾石覆盖度的增大,流速和弗劳德数呈减小趋势;径流深、水流剪切力、阻力系数和曼宁糙率系数呈增大趋势,雷诺数变化不明显。(2)坡面总侵蚀量随着砾石覆盖度的增加呈负指数减少,且砾石覆盖在冲刷流量较小的情况下,对坡面侵蚀量的减少效果越明显。(3)冲刷流量的大小并不影响砾石覆盖度和坡面总侵蚀量之间的关系。研究结果为探究紫色土坡面流侵蚀过程及机理研究提供一定的理论基础。
英文摘要:
      Gravel covering on the surface of soils can increase water infiltration and protect the soil against erosion. However, the effects of gravel covering in purple soils was less well investigated. In this paper, the influence of gravel covering on hydraulic characteristics of slope flow on purple soils in southern China was studied under simulated scouring conditions. Different gravel covering ages from 0 to 40% under three flow rates (2 L/min, 4 L/min, 6 L/min) were set up. Results showed that:(1) Flow velocity and the Froude number decreased, but the runoff depth, flow shear stress, Darcy resistance coefficient and the Manning roughness coefficient increased with the increase of cover ages. (2) The total erosion of the slope decreased negatively with the increase of cover ages. Under the small flow rates, the reduction effect of gravel covering on erosion amount of slope flow was more obvious. (3) The flow rates did not affect the relationship between gravel coverage and total erosion on the slope.
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