水利学报2011，Vol.42Issue(8)：899-907,9.
不同起始条件下坡面薄层紫色土水分和壤中流响应
Impact of boundary conditions on soil water and subsurface flow in shallow purple soil slope
摘要
Abstract
By applying mathematical statistics methods, the parameters of the water-content wave and subsurface flow hydrograph which derived from in-situ simulated rainfall were analyzed, and the effects of rainfall intensity and surface soil bulk density （0-5mm depth） on subsurface flow of a shallow purple soil slope was studied. The results show that the wetting front velocities are in the range from 0.28 to 1.63mm/s with obvious features of preferential flow, which are much higher than the velocities expected from flows that are driven by the combined gradients of gravity and capillarity. Rainfall intensity and surface soil bulk density are major factors affecting the soil water movement and subsurface flow. The increase of rainfall intensity fa- cilitates the occurrence and development of preferential flow, while surface seal is the main reason impedes preferential flow.关键词
壤中流/优先流/薄层紫色土/降雨强度/结皮Key words
subsurface flow/preferential flow/shallow purple soil/rainfall intensity/surface seal分类
农业科技引用本文复制引用
付智勇,李朝霞,蔡崇法,郭忠录..不同起始条件下坡面薄层紫色土水分和壤中流响应[J].水利学报,2011,42(8):899-907,9.基金项目
国家自然科学基金 （）
国家重点基础研究发展计划 （）
国家自然科学基金 （）
