基于Nash单位线的降雨入渗补给过程模拟研究
Study on Simulating Transient Groundwater Recharge from Precipitation by Using Nash Unit Hydrograph Model*

作者: 黄远洋 * , 陈喜 :河海大学水文水资源与水利工程科学国家重点实验室,南京;

关键词: Nash单位线降雨入渗补给砂姜黑土蒸渗仪五道沟 Nash Unit Hydrograph Model Groundwater Recharge from Precipitation Lime Concretion Black Soil Lysimeter Wudaogou

摘要:

本文将降雨入渗补给过程概化为扣损和调蓄两个先后过程,分别用水量平衡法和Nash单位线法对扣损过程和调蓄过程进行模拟。选取安徽五道沟大型水文水资源综合实验站7个地下水位埋深从0.6 m到5.0 m的蒸渗仪资料,进行降雨入渗补给过程模拟,并分析了单位线参数随地下水位埋深的变化规律。研究结果显示,对于五道沟无作物砂姜黑土:基于Nash单位线的扣损–调蓄模型,能够较好地模拟的降雨入渗补给日过程;随着地下水位埋深的增大,非饱和带的蓄滞能力越强;非饱和带平均入渗补给滞时随地下水位埋深的增大而增大。

Abstract: Transient groundwater recharge from precipitation was simplified to two successively processes, named water loss and water transfer, with a water balance model and a water transfer model to simulate them respectively. Seven lysimeters packing undisturbed lime concretion black soil without plants kept fix groundwater depth from 0.6 m to 5.0 m was selected, to simulate transient groundwater recharge from pre-cipitation and analysis the variation of the characteristics of the unsaturated zone represented by the unit hy-drograph parameters to the groundwater depth. The result indicates, for lime concretion black soil in Wu-daogou: the daily groundwater recharge from precipitation can be simulated by the water balance-water transfer model properly; the arrest ability of the unsaturated zone was enhancing with the increasing of groundwater depth; the average delay time of the groundwater recharge was lengthening with the increasing of groundwater depth, mainly effected by the change of arrest ability of the unsaturated zone.

 

文章引用: 黄远洋 , 陈喜 (2012) 基于Nash单位线的降雨入渗补给过程模拟研究。 水资源研究, 1, 299-303. doi: 10.12677/JWRR.2012.15045

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