层施保水剂对毛管水上升特性影响

Impact from layer-applied aquasorb on characteristics of upward-movement of capillary water

通过室内层施保水剂的毛管水上升模拟试验,分析了层施保水剂厚度对毛管水上升特性影响,结果表明:(1)相同毛管水上升高度下,层施保水剂厚度越大,其地下水补给量越大;(2)相同供水时间下,层施保水剂厚度越大,毛管水上升高度越小;(3)供水结束时,在下层土壤湿润范围,距供水面相同距离的土壤含水量随着层施保水剂厚度的增大而增大,在土壤上层湿润范围,相同位置的土壤含水量则相反。以上研究结果可以为高地下水位地区减轻渍害提供理论依据。

Through the indoor simulation experiment on the upward movement of capillary water after the application of the layer- applied aqusorb, the impact from the thickness of the layer-applied aquasorb on the characteristics of the upward movement of capillary water is analyzed herein. The result shows that： 1. under the same height of the upward movement of capillary water, the bigger the thickness of the layer-applied aquasorb is, the more the supplement from ground water will be ; 2. under the same water supply time, the bigger the thickness of the layer-applied quasorb is, the less the height of the upward movement of capil- lary water will be; 3. when water supply shuts off, the soil water content at a same distance to the supplied water table increases along with the increase of the thickness of the layer-applied aquasorb within the wet scope of the lower-layer soil ; whereas, it is reverse for the soil water content within the wet scope of the upper-layer soil. The research result can provide a theoretical basis for alleviating the water logging disaster in the area with high groundwater level.