P641.8
国土资源部科技专项计划项目 (编号 2 0 0 0 10 3 0 1)资助成果
CHEN Zongyu 1,2),NIE Zhenlong 2),ZHANG Hesheng 3),CHENG Xuxue 3),HE Minglin 3) 1) Department of Water Resources and Environmental Engineering,China University of Geosciences,Beijing,100083 2) Institute of Hydrogeology and Environmental Geology,CAGS,Shijiazhuang,Hebei,050061 3) Institute of Hydrology and Engineering Geology,Gansu Bureau of Geology and Mineral Resources Exploration and Development,Zhangye,Gansu,734000
地下水资源的可持续性是当前干旱区流域水资源管理的首要问题之一 ,我国西北内陆干旱区地下水的可持续开发必须首先要了解地下水系统的更新能力 ,地下水的放射性同位素测年可以提供系统循环时间和更新能力的重要信息。本文利用地下水中放射性氚 (3H )和碳 (1 4C)测年方法 ,计算黑河流域地下水的年龄 ,进而讨论地下水的更新性。结果表明 :潜水年龄多数小于 5 0 a,具有可再生的资源的属性 ,其中山前戈壁带和张掖盆地细土平原潜水地下水年龄小于 4 0 a,为 196 3年以来补给。酒泉东盆地排泄区承压含水层中地下水的年龄为 2 338～5 5 6 9a,额济纳附近的深层承压含水层中 ,地下水的年龄为 5 4 86～ 86 30 a,地下水资源更新性较差。但是张掖盆地河流附近深层承压地下水年龄小于 5 0 a,具有一定的更新性。上述认识不仅对黑河流域水资源管理和生态环境建设具有重要意义 ,而且对西北类似的内流盆地的地下水系统的研究有着借鉴意义
Sustainability of groundwater resources is a main factor for proper management of water resources in arid areas. Detailed information on groundwater renewability is vital for sustainable development of groundwater resources in arid basins in northwestern China. Radioisotopic dating of groundwater can provide us with significant information about the circulation time and renewability of groundwater. The present study is designed to show how isotopic measurements ( 3H and 14C) can be integrated to calculate groundwater ages in the Heihe valley alluvial basin, and then discuss the renewability of groundwater. The results suggest that the groundwater ages in unconfined aquifers of the basins are less than 50 a, and those in the piedmont plain and the Zhangye basin are less than 40 a. These waters are renewable resources. The groundwater ages in confined aquifers is more than 2000 a, such as 5486~8779 a, in Ejina. These waters could be regarded as poorly renewable resources. However, the groundwater ages in confined aquifers near the Heihe River in the Zhangye basin are less than 50 a, and thus the groundwater is renewable. The above understanding is of significance not only for the management of water resources and ecological environment, but also for the study of sustainable development of ground water resources in similar inland areas.
陈宗宇,聂振龙,张荷生,程旭学,赫明林.2004.从黑河流域地下水年龄论其资源属性[J].地质学报,78(4):560-567.
CHEN Zongyu ),NIE Zhenlong ),ZHANG Hesheng ),CHENG Xuxue ),HE Minglin ) ) Department of Water Resources, Environmental Engineering, China University of Geosciences, Beijing, ) Institute of Hydrogeology, Environmental Geology, CAGS, Shijiazhuang, Hebei, ) Institute of Hydrology, Engineering Geology, Gansu Bureau of Geology, Mineral Resources Exploration, Development, Zhangye, Gansu,.2004. Groundwater Renewability Based on Groundwater Ages in the Heihe Valley Alluvial Basin, Northwestern China[J]. Acta Geologica Sinica,78(4):560-567.
