土壤水分动态对林地地表径流的影响概况

摘要

Soil moisture is one of the important factors which affect the surface runoff.The analysis of soil moisture distribution in the soil ,changing rules of soil moisture dynamic and the factors affecting soil moisture change has significance on forest ecological environment protection.The distribution of soil moisture is affected by space and time.Moreover ,the soil moisture dynamics and distribution is also affected by factors such as weather factor ,terrain factor , terrain utilization factor and human activities. These factors have led to the differences in soil moisture dynamics in space and time ,which result in the different rainfall-runoff.Therefore ,a further study on the various factors affecting soil moisture change and the law s of soil moisture dynamics change may provide references for the occurrence law s of rainfall- runoff and provide important condition for the protection of the forest vegetation.%指出了土壤水分是影响地表径流产生重要因素之一 ,研究土壤水分在土壤中的分布、土壤水分动态变化规律以及影响土壤水分变化的因子 ,对林地的生态环境保护具有重要意义.土壤水分的分布受空间和时间的影响 ,不仅如此 ,土壤水分动态变化和分布规律还受到诸如气象因子、地形因子、地形利用因子、人为活动等因子的影响.这些影响因素都导致了土壤水分动态变化在空间和时间上的差异 ,从而导致了林地降雨-产流的差异.因此 ,深入研究影响土壤水分变化的各种因素 ,以及研究各种因素对土壤水分动态变化的作用规律 ,一方面能够为降雨-地表径流的发生规律提供参考 ,另一方面为保护林地植被生长提供了重要的条件.