银川平原地下水同位素特征分析  

Analysis of the characteristics of groundwater isotopes in Yinchuan Plain

作　　者：薛忠歧[1] 余秋生[1] 于艳青[1] 尹秉喜[1] 于建华 

机构地区：[1]中国地质大学水资源与环境学院,北京100083 [2]宁夏地质工程勘察院,宁夏银川750021

出　　处：《合肥工业大学学报（自然科学版）》2006年第5期591-596,共6页Journal of Hefei University of Technology：Natural Science

基　　金：中央财政补助地方地质勘查项目

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。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 theconfined 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.

关 键 词：银川平原 地下水 同位素 

分 类 号：P641.3[天文地球—地质矿产勘探] P641.8[天文地球—地质学]