Effects of gullies on the spatiotemporal variability of soil-water under different vegetation types on the Loess Plateau
Gullies are pervasive topographic features on the Loess Plateau.We selected two typical gullies in the water-wind erosion region of the plateau to study the effect of gullies on the spatiotemporal variability of soil-water.The distribution and variation of soil-water storage were evaluated using time-series analysis and classical statistical methods.Soil-water storage varied with distance to the gully borders.The spatial average soil-water in the study sites was 300 cm from the border,soil-water in the vertical direction was mostly dependent on the vegetation,and the gullies had little impact.The spatial distribution of soil-water at a slope scale presented different patterns.Strong upland winds increased the evaporation of soil-water,which rapidly dissipated.Soil-water storage at mid-slope near the gullies was as high as 949.9 mm.The bottom of the slopes had soil-water deficits of 4％.Soil-water storage was much higher in an apricot orchard than in shrubland dominated by Caragana korshinskii Kom.Soil evaporation,vegetation type,and the gullies increased the complexity of the pattern of soil-water.
国家科技期刊平台
NSTL
万方数据
维普
