Assessing distributed groundwater recharge rate using integrated surface water-groundwater modelling: application to Mihocheon watershed, South Korea
Assessing distributed groundwater recharge rate using integrated surface water-groundwater modelling: application to Mihocheon watershed, South Korea
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DOI：
10.1007/s10040-010-0593-1
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发表时间：
2010-03
影响因子：
2.8
通讯作者：
I. Chung;Nam-won Kim;Jeongwoo Lee;M. Sophocleous
中科院分区：
文献类型：
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作者：
I. Chung;Nam-won Kim;Jeongwoo Lee;M. Sophocleous
本文介绍了一种利用SWAT-MODFLOW模型（地表水-地下水综合模型）基于水平衡分量估算地下水补给的方法。建议采用多库存储路由模块代替单一存储路由模块；这代表了一种更现实的水通过气包带的延迟。利用该模块，可以通过检查模拟补给与观测地下水位的相关性来优化与延迟时间相关的参数。该程序的最后一步是将模拟的地下水位以及模拟的流域水流与观测到的地下水位和流域水流进行比较。将该方法应用于韩国米河川流域地下水补给时空分布的估算。利用BFLOW将计算的年充值率与独立估计的充值率进行比较。水文模拟结果表明，应采用分布式水文模拟技术进行长期连续模拟，估算年平均补给速率。
A method of estimating groundwater recharge, based on water-balance components using the SWAT-MODFLOW model (an integrated surface water-groundwater model), is described. A multi-reservoir storage routing module is suggested instead of a single storage routing module in SWAT; this represents a more realistic delay in the travel of water through the vadose zone. By using this module, the parameter related to the delay time can be optimized by checking the correlation between simulated recharge and observed groundwater levels. The final step of this procedure is to compare simulated groundwater levels as well as the simulated watershed stream flow with the observed groundwater levels and watershed stream flow. This method is applied to the Mihocheon watershed in South Korea to estimate spatio-temporal groundwater recharge distribution. The computed annual recharge rate is compared with the independently estimated recharge rate using BFLOW. The hydrologic modelling results show that the annual average recharge rate should be estimated by a long-term continuous simulation with a distributed hydrologic modelling technique.