【摘要】 地下水同位素特征表明银川平原地下水具有不同的补给模式。贺兰山洪积扇单一潜水主要接受山区侧向径流及大气降水补给;青铜峡洪积扇单一潜水及冲湖积平原上覆潜水,主要接受黄河灌溉水的入渗补给。天然状态下,承压水为古地质时期补给形成的“古水”,地下水交替缓慢;开采状况下,平原东部承压水受到了现代补给水的影响,潜水越流量占补给量的50%左右。针对平原区不同的水文地质条件及循环特征,建议采取相应的措施,合理开发利用水资源。更多还原

【Abstract】 The results of groundwater isotope analysis show that the groundwater in the Yinchuan Plain has different recharge patterns.The phreatic groundwater in the diluvial fan in front of the Helan mountain is mainly recharged by precipitation and the lateral flow from the Helan mountain;the phreatic groundwater both in the diluvial fan of the Qingtongxia gorge and in the fluvial plain is mainly recharged by the influent seepage of irrigation water from the Yellow River.In the natural state,the confined water is mainly the palaeowater which was recharged in the past,and its circulation is slow;but in the urban area where groundwater is exploited persistently,large volume of new water entered into the confined aquifer,and the rate of recharge from the upper aquifer accounts for 50%.Aiming at different hydrogeological conditions and water circulation characteristics,some corresponding measures for utilizing water resources reasonably are suggested.更多还原