基于同位素技术的常州市地下水可更新能力研究
DOI:
作者:
作者单位:

1.江苏省地质调查研究院;2.吉林大学新能源与环境学院;3.中国地质大学(武汉)环境学院

作者简介:

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中图分类号:

X523

基金项目:

江苏省地质勘查基金项目“苏锡常都市圈西部环境地质调查”(苏财建[2017]160号);部省合作项目“苏南现代化建设示范区综合地质调查(苏财建[2016]140号)”项目


Study on Renewability of Groundwater in Changzhou Based on Isotope Technology
Author:
Affiliation:

1.Geological Survey of Jiangsu Province;2.College of New Energy and Environment,Jilin University;3.School of Environmental Studies,China University of Geosciences[Wuhan]

Fund Project:

Geological exploration fund of Jiangsu Province, Environmental Geological Survey in the West of Suzhou Wuxi Changzhou Metropolitan Area (NO [2017]160);Ministerial and provincial cooperation projects, Comprehensive geological survey of modern construction demonstration area in southern Jiangsu (NO [2016]140).

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    摘要:

    【研究目的】常州市是长三角地区典型的工业化城市,区域地下水经历了超采-禁采的周期性历史过程,地下水动力场发生了较大程度变化,地下水的可更新能力亟待深入研究。【研究方法】在地下水赋存条件分析的基础上,采用同位素技术,系统分析了常州市地下水的补径排条件和地下水年龄特征,评价了地下水可更新能力。【研究结果】结果表明,区域浅层地下水的18O和D较深层地下水更为富集,在一定程度上受到蒸发作用影响,深层地下水补给时间较早,赋存环境相对封闭。浅层地下水基本受到了现代水入渗补给的影响,现代水积极循环带的深度达到了40m;深层地下水年龄在<2000~25000年不等,以古水为主。【结论】区内浅层地下水更新速率普遍大于0.1%·a-1,地下水的更新受赋存条件、地表水补给、人类活动等因素控制,地下水更新能力在中等及以上;深层地下水更新速率普遍小于0.05%·a-1,地下水的更新受古河道展布、人类开采利用等因素控制,地下水更新能力处于较弱和弱的级别。研究成果可为常州市及长江三角洲其他地区地下水资源的保护和利用提供科学依据。

    Abstract:

    Abstract:This paper is the result of hydrogeological survey engineering. [Object] Changzhou is a typical industrialized city in the Yangtze River Delta. The regional groundwater there had experienced a periodic historical process of overdrafts and prohibitions of mining, resulting in a greatly change in the groundwater dynamic field. Thus, it is necessary to conduct a further study on the renewable capacity of the groundwater of Changzhou. [Methods] Based on the analysis of the existing hydrogeology conditions, the recharge, runoff and discharge conditions of groundwater and the characteristics of groundwater ages are systematically analyzed to evaluate the renewable capacity of groundwater using isotope technology. [Results] The results showed that, 18O and D of the shallow groundwater are more abundant than the deep groundwater due to the evaporation to a certain extent. The recharge time of the deep groundwater with relatively closed storage environment is earlier than that in the shallow groundwater. The shallow groundwater, basically affected by infiltration recharge of modern water, has an active circulation zone of modern water reached to a depth of 40m. As for the ages of the deep groundwater, it varies from less than 2000 to 25000 years, indicating that it is mainly composed of ancient water. [Conclusion] The renewal rate of the shallow groundwater is generally higher than 0.1%a-1, and controlled by the storage conditions, surface water recharge and human activities, etc. Weakly, the renewal rate of the deep groundwater is generally less than 0.05%a-1, and controlled by the distribution of river ancient channel, exploitation and utilization of human beings, etc. These results can provide scientific basis for protection and utilization the groundwater in Changzhou and other areas in the Yangtze River Delta.

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  • 收稿日期:2022-10-19
  • 最后修改日期:2023-04-14
  • 录用日期:2023-05-01
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