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根据开封市柳园口灌区的水文地质条件,运用地下水数值模拟软件Visual Modflow,建立了地下水三维非稳定流模型.用1986-1998年的资料进行率定,1999-2003年的资料进行验证,结果表明模型的模拟结果与实际情况较吻合,模型可以对该灌区的地下水动态进行模拟和预测.拟定不同的地下水开采量、不同的地表引黄水分配以及不同的作物种植结构等方案,对灌区地下水系统对各方案的响应进行模拟.结果表明,与种植结构的调整及控制地下水开采量相比,灌区采用井渠联合应用模式可以更加有效地减少潜水蒸发和控制适宜的地下水位埋深.模拟分析结果为灌区合理开采地下水及提高灌区水利用率提供了科学的水管理依据.
According to the hydrogeological conditions of Liuyuankou Irrigation District in Kaifeng City, a three-dimensional unsteady flow model of groundwater was established by using Visual Modflow, a numerical simulation software of groundwater, which was verified by the data of 1986-1998 and the data of 1999-2003. It shows that the simulation results of the model are in good agreement with the actual situation and the model can simulate and predict the groundwater dynamics in the irrigated area.Different plans of groundwater exploitation, different distribution of surface water diversion and different crop planting structures are formulated, The system simulates the response of each program.The results show that compared with the adjustment of planting structure and the control of groundwater exploitation, the combination of well and canal can effectively reduce the evaporation and control the suitable groundwater level in the irrigation area. The results provide a scientific basis for water management in the rational exploitation of groundwater in irrigated areas and improvement of water utilization efficiency in irrigated areas.