摘要
根据辛店沟 195 5年到 195 9年坡面径流小区的观测资料 ,分析了不同植被 (高粱豇豆、苜蓿、草木樨 )被覆度与降水 (包括雨量 (P)、雨强 (I)以及 PI乘积 (PI30 ) )与侵蚀速率的关系。结果表明土壤侵蚀速率随雨量 ,雨强及PI乘积的增加呈幂函数增加 ,但随被覆度的增加呈下降趋势。在 PI30 相同时 ,不同植被对土壤侵蚀速率的影响也不同。应用 U SL E(The U niversal Soil L oess Equation)分别模拟了三种不同植被被覆度与降水因子对土壤侵蚀的关系方程和辛店沟全流域的水土流失方程 ;
Based on the observed data from 1955 to 1959 from runoff plots in Xindian Gully of Suide Soil and Water Conservation Experiment Station,effects of vegetation cover, vegetation types, rainfall and its intensity on soil erosion were discussed.And the results indicated that soil loss ratio decreased exponentially with the increase of vegetation cover, while it increased powerfully with the increase of rainfall, rainfall intensity and PI 30 . Based on the principle of USLE (The Universal Soil Loess Equation), soil and water loss equations were simulated across the whole watershed. The main characteristics and laws of soil and water conservation by vegetation and rain are comprehensively expounded, and its systematic summarization is made.
出处
《水土保持研究》
CSCD
2003年第2期13-16,49,共5页
Research of Soil and Water Conservation
