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基于地表水与地下水耦合模型的溪泉湖湿地数值模拟的应用研究

Keywords: VisualMODFLOW,QUAL2K,地表水,地下水,耦合模型

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Abstract:

通过建立溪泉湖水源地地表水与地下水联合运用的耦合模型,借助于QUAL2K软件计算地表河流控制断面的入水浓度.采用MT3D模型,基于VisualMODFLOW有限差技术,分析了沈阳市沈北新区溪泉湖湿地构建储备水源地10a后地下水环境的动态变化.水位模拟结果显示:2020年构建储备水源地处形成漏斗,水源地构建后的地下水水位降落漏斗处地下水等水位线比构建前下降2.5m,与2009年初始水位相比大幅度下降,既满足水源地供水效益,又解决了周边水库蓄水造成的浸没问题.水质模拟结果显示:周边水库地下水水质较好,没有对水源地水质造成影响,但辽河支流的水质不容乐观,对水源地水质造成严重威胁.因此,为保障水源地水质安全,对溪泉湖地表水体进行污染防治势在必行.

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