摘要
针对五道沟实验站亚粘土(砂姜黑土)且无植被覆盖区内的蒸渗仪中的不同地下水位埋深之上的非饱和土层,建立了非饱和带数值模型,进而模拟出不同地下水位埋深时的地表径流量及入渗补给量变化规律。数值模拟结果表明,地表径流量及入渗补给量随降雨量增大而增大,地表径流系数总体随降雨量增大而增大,随地下水位埋深增加而减小;但对强降雨,地下水位埋深对地表径流系数影响较小。
Aiming at the unsaturated loam(mortar black soil) soil above the groundwater depth which is no vegetation in the lysimeter at Wudaogou hydrologic experimental station of Anhui Province,a numerical model of unsaturated zone is establish to simulate the change laws of the surface runoff and infiltration recharge under different depths of underground water.The simulated results show that the average surface runoff and infiltration recharge tend to be increased with increase of the rainfall;the surface runoff coefficients tend to be increased with increase of the rainfall and tend to be decreased with the increase of the groundwater depth;when the rainfall intensity is large,the groundwater depth has almost no influence on the surface runoff coefficients.
引文
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