Discussion on the Origin of Groundwater in the Orods Basin
Discussion on the Origin of Groundwater in the Orods Basin
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发表时间：
2013
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通讯作者：
Chen Jian-shen
中科院分区：
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作者：
Chen Jian-shen
本文讨论了鄂尔多斯盆地地下水补给问题的两种不同观点，指出了以往鄂尔多斯盆地地下水补给、径流、排泄模型研究中存在的问题：（1）没有考虑大气水、地表水、土壤水和地下水之间相互转化的重要环节--土壤水，概念模型得到的地下水循环模型不能解释流域与基底断裂带重合的事实; (2)在一些学者的地球化学反模拟研究中，没有将白云岩和方解石的碳同位素组成进行对比，结果表明，模拟结果可以用来解释白云岩和方解石的碳同位素组成。（3）由于深部CO2的干扰，14 C不能用于华北地区地下水年龄的测定。指出降水不是鄂尔多斯盆地地下水的主要补给来源，土壤水主要由地下水补给，鄂尔多斯盆地地下水主要由外生水补给，深断裂是鄂尔多斯盆地地下水的主要补给来源。主要水道。
Two controversial opinions on the recharge of theOrdos Basin groundwater were discussed in this study.The problems in the previous studies on recharge,runoff,and discharge models of the Ordos Basin were discussed:(1) The soil water,the most important part of the conversion among atmospheric water,surface water,soil water and groundwater,is not taken into account.The groundwater circulation model obtained by the conceptual model cannot be used to explain the fact that watershed is in coincidence with the basement fault zone.(2) The comparison of the isotopic compositions in dolomite with that in calcite is not conducted in some scholars' studies of the geochemical reverse simulation,with the result that the simulation results can be applied to explain the C isotope compositions in dolomite and calcite.(3)14C can not be used to obtain the ages of the groundwater in north China because of the interference of the deep CO 2.Based on the D,18Oand Cl-compositions in the soil water,it is pointed out that the precipitation is not the main recharge source of the groundwater and the soil water is fed by the groundwater.The groundwater in the Ordos Basin is recharged by the exogenous water and deep faults are the main water channels.