Characteristics of Soil Infiltration Parameters in Autumn-Crop Slope Farmlands of Loess Plateau
In order to reveal the infiltration characteristics under vegetation cover in slope farmland,took three autumn crops (maize,soybean,millet) in the Loess Plateau as the research objects,and analyzed the characteristics and the impact factors of the initial infiltration rate,stable infiltration rate,average infiltration and cumulative infiltration amount in all crops growth periods by simulated rainfall and water balance methods.The results showed that:(1) Infiltration amount decreased with the rainfall events duration in the slope farmland under rainfall infiltration process.(2) The initial infiltration rate,average infiltration rate and cumulative infiltration amount in slope farmland were higher than the control groups.But the stable infiltration rate showed no obvious differences between the soybean,millet and control groups except the maize.Generally the four parameters were basically increased with rainfall intensity and leaf area index and decreased with the slope.(3) Multiple regression models of the initial infiltration rate,stable infiltration rate,average infiltration and cumulative infiltration were conducted based on the data of rainfall intensity,slope and leaf area index and provided basic information for the infiltration process simulation.
国家科技期刊平台
NSTL
万方数据
维普
