Dynamic Study on the Soil Water Storage in Water Source Area of Terrace at Yuanyang County
Through the measurement and calculation of the soil water storage at the different soil layers at the upper,middle and lower part in 3 standard run-off plots of arbor forest,shrub land and wild grass land,it was analyzed the variation features of the soil water storage in water source area of terrace at Yuanyang County.The results show that,there are significant differences in soil water storage capacity among different soil layers,with surface soil water storage varying more dramatically than in deeper layers.The order of soil water storage was arbor forest＜shrub land＜wild grass land while the order of water storage in deep soil layer was arbor forest＞shrub land＞wild grass land.The seasonal variation of soil water storage is more obvious,with the soil water storage at the soil layer from 0 to 100 cm showing the order of arbor forest(227.05 mm)＞shrub land(163.14 mm)＞wild grass land(143.11 mm).The relationship between monthly dynamic coefficient of variation of soil water storage is as follows:arbor forest(12.77％)＞wild grass land(11.16％)＞shrub land(10.78％).As time goes on,soil water storage appears the trend of first increasing and then decreasing,with obvious seasonal and vertical variation of soil water storage.
万方数据
维普
