紫色土坡耕地壤中产流特征及分析  

Interflow Occurrence Characters and Their Analysis on Slope Cropland with Purple Soil

作　　者：徐佩[1] 王玉宽[1] 傅斌[1] 王道杰[1] 王先拓[1] 王勇强[1] 

机构地区：[1]中国科学院成都山地灾害与环境研究所,四川成都610041

出　　处：《水土保持通报》2006年第6期14-18,共5页Bulletin of Soil and Water Conservation

基　　金：国家973计划项目(2003CB415202)

摘　　要：壤中流是紫色土坡面流的重要组成部分和表现形式,它受雨强、坡度、土层厚度、耕作方式等多种因素的综合影响。利用人工模拟降雨研究了紫色土坡耕地壤中流产流规律。结果表明,(1)耕作能有效改善土壤结构,增加降雨入渗量,并增大壤中流发生机率;(2)紫色坡耕地土层较浅是导致壤中流增大的主导因素,缓坡有利于壤中流的产生;(3)雨强对壤中流的流量过程线有显著影响,但对于壤中流的起始产流时间影响不明显;随雨强增大,壤中流峰值流量显著增加;(4)壤中流的产生滞后于地表流,产流过程表现出缓慢变化的单峰过程。Interflow is an important component of the flow on slopes with purple soil, and is determined comprehensively by rainfall, slope feature, soil depth and cultivation regime. Simulated rainfall was used to study the mechanism of interflow on slope cropland of purple soil. Results show that cultivation can improve soil physical structure and induce a higher probability for interflow occurrence. Shallow soil depth on slope cropland dominates interflow occurrence, and flat slope generates interflow more easily than steep slope. Rainfall intensity has a signif- icant effect on the process of interflow except for the case on pounding time, and the interflow peak increases with rainfall intensity. Interflow lags with overland flow and the hydrological process display as a curve with only one peak.

关 键 词：壤中流 紫色土 坡耕地 

分 类 号：S152.72[农业科学—土壤学]