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根据张掖东盆地水文地质条件和水源地地下水开发利用现状,采用Visual Modflow4.1软件分别建立地下水水流和水质模型,通过计算污染物污染负荷值确定运移污染质及其初始浓度,在水流模型预测水源地未来开采形成的稳定流畅环境下运行水质模型,模拟计算该污染质在规定时间内到达水源地捕获带的位置,运移100天的范围划定为水源地一级保护区,运移1 000天的范围划定为水源地二级保护区,二级保护区外补给边界划分为水源地的准保护区。
According to the hydrogeological conditions of Zhangye-Dong basin and groundwater exploitation and utilization status in the water source area, the groundwater flow and water quality model were established by Visual Modflow 4.1 software. The pollutant transport load and its initial concentration were determined by calculating the pollutant load. The future operation of the water source to form a stable and smooth environment running water quality model to simulate the contaminated water within a specified time to reach the capture zone of the water source, the scope of 100 days of migration designated as protected areas of water sources, the transport 1 The range of 000 days shall be designated as Grade II Reserve of water sources and the quasi-protected area of source water outside the Grade II Reserve.