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地球学报  2006 

黑河流域地下水同位素特征及其对古气候变化的响应

DOI: 10.3975/cagsb.2006.04.09

Keywords: 黑河流域,地下水,同位素特征,古气候,更新性

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Abstract:

通过环境同位素及其Tamers、IAEA模型应用研究表明,黑河流域平原区地下水补给及更新与古气候变化密切相关,8000~5000aBP、3500~2500aBP和近1000年以来的多雨期是主要补给期;潜水较年轻又更新快,承压水较老又更新慢;东部地下水更新较快,西部更新较慢;祁连山前戈壁带地下水更新较快,细土平原更新较慢;近河道带地下水更新速率大,远离河道则小。东部以山区降水通过出山地表径流补给为主,西部冰川雪融水和山区基岩裂隙水是主要补给源。因此,遵循地下水补给与更新的自然规律,与地表水联合优化调控,有利于该区地下水可持续利用及下游区生态环境保护。

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