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引用本文:苏晨,程中双,郑昭贤,陈宗宇. 穆兴平原北部地下水年龄及更新性[J]. 中国地质, 2019, 46(2): 328-336.
SU Chen,CHENG Zhongshuang,ZHENG Zhaoxian,CHEN Zongyu. Groundwater age and renewability in the north of Muling-Xingkai plain[J]. Geology in China, 2019, 46(2): 328-336(in Chinese with English abstract).
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穆兴平原北部地下水年龄及更新性
苏晨1,2, 程中双1,2, 郑昭贤1,2, 陈宗宇1,2
1.中国地质科学院水文地质环境地质研究所;2.自然资源部地下水科学与工程重点实验室
摘要:
地下水年龄结构是了解一个地区地下水资源开采可持续性的重要基础。穆兴平原地下水开采量增加以及地下水环境恶化,对该地区可持续发展有一定制约,为此在2016年采集CFCs样品31组和3H样品60组,估算了研究区地下水年龄。结果表明,穆兴平原北部地下水年龄为21年到大于65年,由西北部和穆棱河向平原中部及乌苏里江逐渐变老,更新性变差,主要受到大气降水和地表河水补给,但是由于地表覆盖一层黏性土,地下水中缺失小于10年的水;不同井深样品中二者及NO3-浓度的变化,表明在60 m以上地下水的防污性能较差,而在100 m以下则较好,饮用水源井深需超过100 m。
关键词:  放射性氚  氟利昂CFCs  地下水年龄  更新能力  穆兴平原
DOI:10.12029/gc20190209
分类号:P641
基金项目:中国地质调查局地质调查项目(DD20160311)和国家自然科学基金(41702283)资助。
Groundwater age and renewability in the north of Muling-Xingkai plain
SU Chen1,2, CHENG Zhongshuang1,2, ZHENG Zhaoxian1,2, CHEN Zongyu1,2
1.Institute of Hydrogeology & Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061, Hebei, China;2.Key Laboratory of Groundwater Science and Engineering, Ministry of Natural Resource, Shijiazhuang, 050061, Hebei, China
Abstract:
The age structure of aquifer is an important basis for understanding the sustainability of groundwater exploitation. Increasing groundwater pumping with deteriorate groundwater environment in the Muling-Xingkai Plain (MXP) has restricted to some extent the sustainable development of the region. 31 groups of CFCs and 60 groups of 3H samples were collected to delineate groundwater flow systems. Estimated groundwater age ranges from 21 years to more than 70 years in the northern part of the MXP. Younger water occurs in northwest piedmont and hilly areas as well as Muling River, while older water occurs in the central part of the plain and the Wusuli River. This reflects long flow paths associated with regional flow. Although groundwater is mainly recharged by rain and surface water, ground water younger than 10 years was not found for the unsaturated zone consisting of silty clay. The variations of 3H and CFCs combined NO3- with wells depth indicate that the aquifer sensitivity of groundwater system above 60m is low and it is high below 100m. Wells for drinking water should exceed 100m.
Key words:  radioactive tritium  chlorofluorocarbons  groundwater age  renewability  Muling-Xingkai plain