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地球学报  2009 

高精度地下水示踪技术及其应用——以毛村地下河流域为例

DOI: 10.3975/cagsb.2009.05.14

Keywords: 高精度,在线监测技术,地下水示踪,桂林毛村

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Abstract:

笔者以桂林毛村岩溶地下河流域的示踪试验为例,探索高精度地下水示踪方法在岩溶水文地质研究中的应用。实践证明,该方法较传统示踪方法具有较大优势。试验中,从地下河主出口回收I号示踪剂为34%,地下水平均流速为35.3m/h,全部回收率约为60%~70%。示踪结果证实毛村地下河流域具有典型河间地块特征,存在多个排泄出口,水文地质边界较复杂;主出口处示踪剂浓度变化呈宽域多峰,说明具有多管道、沿途多个较大溶潭特征;II号示踪剂在所有接收点都没有收到,其原因较为复杂和不确定。枯季部分地下水有沿西南方向断层排泄迹象,雨季是否存在较大径流,还需用示踪试验来证实;流量不均衡,排泄区可能存在潜流。

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