Calculating precipitation recharge to groundwater applying envieronmental chloride tracer method

Q. Yong, Zhang Zhaoji, Fei Yuhong, Zhang Feng’e, C. Jingsheng
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引用次数: 2

Abstract

Precipitation infiltration recharge of groundwater has happened great change in North China Plain, caused by thick unsaturated zone going with groundwater level's drop, because of long-term sustainable mining. In this paper, rainfall infiltration recharge, in typical section of Piedmont Plain, was calculated applying environmental chloride tracer method, followed by objectivity analysis to the results. Rainfall infiltration coefficient, calculated by Chloride Accumulated Method, are 2.17%(K1) and 4.38%(K2), while infiltration quantity are 11.54mm/a(K1) and 23.29mm/a(K2) in current groundwater level (30m). Compared to the average value of this zone in 1985, 0.28, and the highest value, 0.37, and the lowest value, 0.18, the coefficient reduced significantly.
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应用环境氯化物示踪法计算降水补给量
由于长期持续开采,华北平原地下水降水入渗补给量发生了较大的变化,这是由于地下水位下降而形成的厚非饱和带。本文采用环境氯离子示踪法对山前平原典型断面的降雨入渗补给量进行了计算,并对结果进行了客观分析。氯化物累积法计算的降雨入渗系数分别为2.17%(K1)和4.38%(K2),当前地下水位(30m)下的入渗量分别为11.54mm/a(K1)和23.29mm/a(K2)。与1985年的平均值0.28、最高值0.37和最低值0.18相比,该系数显著降低。
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