泥沙研究Issue(5)：33-37,5.
灌木减流减沙效应及其水力学机理试验研究
Experimental study of effect of shrubs on runoff and sediment reduction and its hydrodanamic mechanism
摘要
Abstract
Effect of shrubs on runoff and sediment reduction and its hydrodynamic mechanism were studied on a 20° slope using simulated rainfall experiment. The results show that the soil infiltration rate of the shrub slope is 2. 9 -4. 7 times higher than that of the bare slope under rainfall intensities of 45, 90 and 130 mm/h, respectively. Compared with those on the bare slope, the flow velocity, runoff and sediment yield on the shrub slope are decreased by 59. 4% -81. 9% , 61. 7% -80. 6% and 95. 5% -99. 3% , respectively. The hydraulic parameter of unit flow energy can be used as a dominant indicator for predicting the sediment yield. The critical unit flow energy of the bare slope and of the shrub slope is 0. 074 cm and 0. 13 cm, respectively. The experimental results are meaningful for quantifying effects of shrubs on reducing runoff and sediment yield.关键词
减流减沙/侵蚀产沙量/断面比能/灌木Key words
runoff and sediment reduction/ sediment yield/ unit flow energy/ shrub分类
农业科技引用本文复制引用
肖培青,姚文艺,王昌高..灌木减流减沙效应及其水力学机理试验研究[J].泥沙研究,2012,(5):33-37,5.基金项目
国家重点基础研究发展计划973项目(2011CB403303) （2011CB403303）
国家自然科学基金项目(41071191) （41071191）
中央级公益性科研院所基本科研业务费专项资金(HKY-JBYW-2012-04) （HKY-JBYW-2012-04）
