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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 soil layer above the groundwater table buried in different depths of loam in the Wudougou experimental station, which is located in the loamy soil (lime-black soil) without the vegetation cover, a numerical model of the unsaturated zone was established to simulate different Surface runoff and infiltration recharge under groundwater table. The numerical simulation results show that the surface runoff and infiltration recharge increase with the increase of rainfall, and the surface runoff coefficient increases with the increase of rainfall and decreases with the increase of groundwater depth. However, for heavy rainfall, The depth of groundwater table has little effect on the surface runoff coefficient.