Impacts of Contour Reverse-slope on Spatial Distribution of Soil Moisture in Sloping Farmland During Rain Season in Water Source Area of Songhuaba Reservoir
[Objective] The objective of this study is to analyze the impacts of contour reverse-slope on the spatial distribution of soil moisture in sloping farmland during rain season serious in order to provide theoretical basis for the improvement of the contour reverse-slope in water source area of Songhuaba reservoir in Kunming City.[Methods] We set up contour reverse-slope in the sloping farmland in Yizhe valley,and observed the soil moisture content at different soil depth in different positions of slope during different periods.[Results] Soil moisture content in contour reverse-slope maintained at stable level after 2 rainy days.At the upper reverse-slope,it reduced by 2.71％.In contrast,soil moisture changed greatly in different positions of slope.Soil moisture at upslope reduced by 9.04％,while at the middle slope,reduced by 10.41％.[Conclusion] Contour reverse-slope can retain soil surface runoff and moisture,and influence the distribution of soil moister in 20-40 cm depths of soil layer.
国家科技期刊平台
NSTL
万方数据
维普
