A case study from Yinchuan basin shows a good result and the mean age of shallow groundwater in Yinchan basin is about 30 years.
该方法应用到银川平原取得良好的效果，研究表明银川平原浅层地下水的周转时间为30 a。
A case study from Yinchuan basin shows a good result and the mean age of shallow groundwater in Yinchan basin is about 30 years.
该方法应用到银川平原取得良好的效果，研究表明银川平原浅层地下水的周转时间为30 a。
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