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地球学报  2007 

华北平原地下水年龄校正

DOI: 10.3975/cagsb.2007.04.11

Keywords: 地下水,年龄校正,传统模型,水流路径,反向质量平衡模型,NETPATH,华北平原

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Abstract:

地下水14C年龄一般指地下水和土壤CO2隔绝至今的年代.地下水测年在地下水水文学中占有特殊的位置,地下水测年可以用来确定补给区,估算地下水流速度、流量、补给速率、水力传导系数和有效孔L隙度,而且年龄数据还可以用来完善地下水流模型.本研究选择华北平原为重点研究区,利用地下水中的同位素和化学组分的测试结果,应用水文地球化学及同位素水文学等相关知识,通过六种传统模型和反向质量平衡模型(NETPATH)对华北平原地下水年龄进行校正.根据年龄校正结果,分析了深层地下水的年龄变化特点,确定了水流路径上发生的水文地球化

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