生态环境学报Issue(9)：1556-1563,8.
华南红壤坡面侵蚀水动力学机制试验研究
Experimental study on soil erosion and flow hydraulics on red soil slope
摘要
Abstract
In China, there is another potential heavy erosion area of china is red soil slope land in south China except loess slope. There is soil erosion potential danger due to heavy storm rainfall affairs often occur in red soil slope land in south China. It is very important to study mechanism of flow hydraulics on red soil slope in such area. This study used simulated rainfall method to investigate the interactive influence by soil slope gradient(5°, 10°, 15°, 20°, 25°)and rainfall intensity(30, 60, 90, 120, 180, 210, 270 mm∙h-1) on red soil erosion processes and flow hydraulics. The results show that:(1) the most treatments were shown erosion flow regimes usually indicated in sub-critical laminar flow and a little indicated in super-critical laminar (Except for two treatments:5° slope gradient and 120mm/h rainfall intensity;20° slope gradient and 270mm/h rainfall intensity). Except for average flow velocity increased as simulated rainfall intensity increased, the other flow hydraulics, such as Manning roughness coefficient, Manning roughness coefficient, Shear stress, and Steam power can impacted by rainfall intensity and slope gradient, but cannot fitted by a simple function. (2) The rate of Manning roughness coefficient (n/h) is a better hydraulic parameter indicator for predicting the sediment load in red soil slope erosion.关键词
红壤/侵蚀/模拟降雨/水动力/流速Key words
red soil/erosion/simulated rainfall/flow hydraulics/flow velocity分类
农业科技引用本文复制引用
郭太龙,卓慕宁,李定强,蔡庆,谢真越,廖义善,胡建..华南红壤坡面侵蚀水动力学机制试验研究[J].生态环境学报,2013,(9):1556-1563,8.基金项目
国家自然科学基金项目(41101257；41171221)；广东省自然科学基金项目(S2012030006144；S2011020005896)；广东省水利厅委托项目(GPCGD112197FT141F1；GPCGD122197FD096F) （41101257；41171221）
