Modeling the Effect of Groundwater Abstraction on Wei River Riverine Ecological Flow Using the Coupled Model of Groundwater and Surfacewater
In this study, the latest version of river boundary modular in MODFLOW, was employed in this watershed for the case study of coupled calculation between river and aquifer. Because of the complex interaction of groundwater and surface water in this area, the coupling model of SFR modular for river diffusive wave model and isochronal cell method for overland flow confluence model and numerical calculation of groundwater is coupled to simulate the runoff process of Weihe river. The model validation was aiming at river flow rate and groundwater field. The results show that 65% of the abstracted shallow groundwater comes from the river water and the reduced amount of river baseflow by the groundwater abstraction is 122 million m3 per year, which is also validated by a water balance analysis of river links. The 50% reduction of shallow groundwater abstraction may lead to a recover of 3 m of the lowest groundwater level. The study provides a sound analysis tool to the integrated water resources and ecology management in the region.
Cai Suo Zhang
B. Zhang et al., "Modeling the Effect of Groundwater Abstraction on Wei River Riverine Ecological Flow Using the Coupled Model of Groundwater and Surfacewater", Advanced Materials Research, Vols. 433-440, pp. 1453-1457, 2012