Simulation of the impacts on water cycle by groundwater exploitation in the Haihe River Basin
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Abstract:
By improving the hydrological parameterization schemes of the land surface model (CLM3.5) using the Distributed Time Variant Gain Model（DTVGM) which was developed independently, embedding a module which reflects the impact of groundwater exploitation on water cycle process, considering domestic water, industrial water and ecological water，a large-scale land water cycle model was developed which could describe the nature and human process of a basin. The Haihe River Basin where groundwater is extracted seriously was chosen as the study area, using high spatial and temporal resolution meteorological element data sets of China established by the Institute of Tibetan Plateau as atmospheric forcing drivers, this paper conducted simulation test for the water cycle process in 1980-2010 in the Haihe River Basin, and analyzed the impacts of groundwater exploitation activities on the water cycle process. The results showed that: groundwater exploitation caused the decrease in runoff and soil moisture in the overall basin; the evapotranspiration in the overall basin increased, and the spatial variation of water cycle elements was large.
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