基于地表水-地下水耦合模拟的傍河水源地补给能力评价OA

In order to explore the evolution law of the hydrologic cycle in the water source conversion process under different working condi-tions,this paper took Jiuwutan water source in Zhengzhou as the research object,and constructed a simulation model of surface water-ground-water transfer process in the riverside source area based on geological,hydrological,meteorological and artificial water withdrawal data.Based on the daily surface water flow data from the Huayuankou hydrological station and groundwater level data from typical observation wells,the model parameters were calibrated and verified,and the distribution characteristics of water circulation and groundwater in Jiuwutan water source area were clarified.The results show that:1)The Nash efficiency coefficients of MIKE 11 and MIKE SHE models are 0.94 and 0.71 respectively during calibration and verification,and the relative errors are controlled within±15%,which indicates that the models are more accurate in simulating the daily flow of Huayuankou hydrology station and the groundwater level process of observation well;2)There is still a significant groundwater drop funnel in the case of further water and sediment transfer and the recovery of groundwater level in the south,and the groundwater drawdown funnel will continuously diminish until it vanishes when the extraction volume is reduced to 1 million m3;3)The groundwater in the study area basically keeps the trend of flow from north to south and from west to east,but under the current exploitation amount,the groundwater exploitation well area is fully replenished by the surrounding area.