摘要
[目的]研究负水头毛细渗灌青海湖周边沙粒中的入渗规律。[方法]将装沙子的透明塑料管以不同角度摆放,比较几个方向的输水速度。[结果]在非饱和状态下水平渗透速率较其他方向要大,含水量最大值约20%(质量比),以水平渗透的含水量最大。小水量三维入渗时,润湿沙粒呈椭球状态,长轴在水平方向。[结论]该研究可为下一步固沙植生节水器的设计和应用提供重要的理论依据。
[ Objective ] To research the character of water capillary filtration around Qinghai Lake sand under water supply of negative hydrau- lic head. [ Method ] Transparent plastic loaded sand tube were placed at different angles, water velocity of different directions were compared. [ Result] The results showed that horizontal infiltration velocity and water content are bigger than other direct in unsaturated sand. The largest water content is 20 percent. The moist sands form ellipsoid under three dimensional small amount water infiltration, and long axis along hori- zontal. [ Conclusion] The study can provide theoretical basis for design and application of sand fixing vegetation water saving device.
出处
《安徽农业科学》
CAS
2013年第34期13323-13324,共2页
Journal of Anhui Agricultural Sciences
基金
国家自然科学基金项目地区项目(512562024)
关键词
沙漠地区
毛细输水
植生
Desert area
Capillary water
Plant growth
