Groundwater recharge rates for regional groundwater modelling: a case study using GROWA in the Lower Rhine lignite mining area, Germany
Groundwater recharge rates for regional groundwater modelling: a case study using GROWA in the Lower Rhine lignite mining area, Germany
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区域地下水模型的地下水补给率：使用 GROWA 在德国莱茵河下游褐煤矿区进行的案例研究
DOI：
10.1007/s10040-009-0493-4
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
F. Wendland
中科院分区：
文献类型：
--
作者：
F. Herrmann;C. Jahnke;Florian Jenn;R. Kunkel;H. Voigt;J. Voigt;F. Wendland
地下水补给率计算与GROWA模型已被应用为区域地下水模型Rurscholle的补给边界条件。该模型模拟了下莱茵河褐煤矿区（德国）更新世含水层的地下水动态。GROWA使用一种区分地区的方法来计算补给率取决于径流相关的网站的特点，这是由一组基流指数。耦合的地下水和GROWA模型的区域准确性已被检查使用地下水过程线作为验证标准。结果表明，目前（未经调整）版本的GROWA低估了10-20毫米/年的区域地下水补给率。通过比较分析，确定了一些地区，在这些地区，可以通过调整径流主要是坡度、低内涝和低密封程度的地区的基流指数，改进补给计算。使用调整后的基流指数，Rurscholle地区的平均地下水补给率模拟为约。170毫米/年这项研究突出了使用耦合方法的好处，能够独立校准和验证区域地下水模型中的地下水补给边界条件。
Groundwater recharge rates calculated with the GROWA model have been applied as the recharge boundary condition for the regional groundwater model Rurscholle. This model simulates groundwater dynamics in the Pleistocene aquifers of the Lower Rhine lignite mining area (Germany). GROWA uses an area-differentiated approach to calculate recharge rates depending on runoff-relevant site characteristics, which are represented by a set of baseflow indices. The regional accuracy of the coupled groundwater and GROWA models has been checked using groundwater hydrographs as validation criteria. The results suggest that the current (unadjusted) version of GROWA underestimates the regional groundwater recharge rate by 10–20 mm/yr. The comparative analysis identified areas where recharge calculations could be improved by adjusting the baseflow indices for areas where runoff is dominated by slope, low water-logging and a low degree of sealing. Using the adjusted set of baseflow indices, the mean groundwater recharge rate of the Rurscholle region was modelled as approx. 170 mm/yr. This study highlights the benefit of using a coupled approach and being able to independently calibrate and validate groundwater recharge boundary conditions in regional groundwater models.