晋西黄土区土壤水分入渗的时空分布研究

Study on the temporal and spatial distribution of soil moisture infiltration in the West Shanxi Province

以晋西黄土区为研究对象,利用人工降雨机对不同地类的土壤进行入渗试验,研究结果表明:大部分地类土壤入渗率可分为速变期、缓变期、稳定期等三个阶段,而道路路面只分为速变期和稳定期两个过程。在不同地表条件的土壤入渗中,林地的入渗量最大,草地和耕地次之,路面最小。鉴于Philip方程对该地区土壤入渗的模拟精度最高,利用简化的土壤入渗方程,将影响土壤入渗的多项因子转换成一个参数,可为土壤入渗空间尺度转换提供新的思路和方法。

Soil moisture infiltration on the spatial heterogeneity model is studied in Shanxi Province.In the paper,data of soil moisture infiltration through artificial rainfall machine was analysed.The research results showed that the infiltration rate of most soil types can be divided into three stages:rapid variation period,slow change period,and stable period.The road surface is only divided into two processes:rapid variable period and stable period.In soil infiltration under different standing conditions,the forest land is the largest,followed by grassland and arable land,and the road surface is the smallest.The Philip equation has the highest simulation accuracy for soil infiltration in the area.Using the simplified soil infiltration equation,the factors affecting soil infiltration are converted into one parameter,which provides new ideas and methods for the conversion of soil infiltration spatial scale.