The Simulation to Water Transport in Unsaturated Soils

Both water supply and substantive rainfalls course the water influent to unsaturated soil and change the water content. Base on conventional transport of unsaturated soil water, established the transport equation, and gave out model solving process. This model could forecast the movement law at unsaturated soil environment. Use the software Femlab simulated the change law about transport of unsaturated soil water in 10days. The result shows that the horizon and vertical water content is incessant increase with the time; Water content came along the distance water source increase whereas decrease; the farther to the distance water source, the smaller to the water content; water movement degree at penetrability well soil is greater than the penetrability poor soil, so transport of unsaturated soil water mostly focus on the penetrability well soil. Both toward handling problem about soil and water loss, pollution to surface water and groundwater flood drought with water resources have theory supervise sense and operation significance.