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中文摘要：
以滦河为例，基于FEFLOW建立二维剖面水流模型和硝酸盐运移模型，根据地质、水文地质和实测水位资料调试水文地质参数，校正模型很好地反映研究区情况。利用校正后的模型模拟了不同厚度河床沉积物对硝酸盐的扩散情况，发现了河床沉积物厚度对污染物扩散影响的变化规律，结论对研究污染河水对地下水的影响具有指导性意义。
英文摘要：
In case of the Luanhe River （ in Hebei Province） , two-dimensional cross section flow model and Ni- trate transport model based on FEFLOW are created. Meanwhile, hydrogeology parameters is adjusted according to hydrogeology measured water level information and corrected models which perfectly reflected the situation in re- searching area. And discovery of the variation regular pattern demonstrating how riverbed sediment thickness would influence over pollutant dispersion by using of adjusted models which simulating spread of nitrate in riverbed sedi- ments with different thickness. The conclusion will guide the research on impact of polluted river water on under- ground water.
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