长江中游荆江段地下水排泄的量化及其空间差异性分析
Quantification of Groundwater Discharge and Its Spatial Variability in Jingjiang Section of Middle Reach of the Yangtze River
周子皓 1杜尧 1孙晓梁 1范红晨 1邓娅敏2
作者信息
- 1. 中国地质大学环境学院,湖北武汉 430078
- 2. 中国地质大学环境学院,湖北武汉 430078;中国地质大学地质调查研究院,湖北武汉 430074
- 折叠
摘要
地下水与河流的相互作用对于维持河流生态系统的健康十分关键,但是目前对于地下水向湿润地区大型河流排泄过程的定量化研究较为薄弱.针对这一问题,以长江中游荆江段为研究区,通过野外采样和水文气象数据收集,利用 222Rn质量平衡模型定量估算长江中游荆江段的地下水排泄,并用EC质量平衡模型及水量平衡模型验证 222Rn质量平衡的结果.结果显示:长江中游荆江段的平均地下水排泄速率为 133 mm/d,排泄总量为 1.06×108 m3/d,对水量平衡的贡献约为 10.99%.其中枝城-沙市段地下水排泄速率最大,监利-螺山段地下水排泄速率最低.含水层富水性和地下水位可能是控制地下水排泄速率的关键因素.本研究对于流域水资源管理具有重要意义,也可为今后长江中游地区水资源的合理开发利用以及生态环境保护提供理论依据.
Abstract
The interaction between groundwater and rivers is critical to maintaining the health of river ecosystems,but the quantitative research on the groundwater discharge to large rivers in humid regions is currently weak.In response to this problem,in this paper it takes the Jingjiang Section of the middle reach of the Yangtze River as the study area,and uses the 222Rn mass balance model to estimate the groundwater discharge in the Jingjiang Section of the middle reach of the Yangtze River through field sampling and hydrometeorological data collection,and uses the EC mass balance model and water balance model to verify the result of 222Rn mass balance.The results show that the average groundwater discharge rate of the Jingjiang Section in the middle reach of the Yangtze River is 133 mm/d,the total discharge volume is 1.06×108 m3/d,and the contribution to the water balance is about 10.99%.Among different sub-sections,the groundwater discharge rate from Zhicheng to Shashi is the highest,and the groundwater discharge rate from Jianli to Luoshan is the lowest.Aquifer richness and groundwater table may be key factors controlling the rate of groundwater discharge.This research is of great significance for the local eco-environmental protection and the control and management of water resources,and can also provide a theoretical basis for the better development and utilization of water resources in the middle reach of the Yangtze River and eco-environmental protection in the future.
关键词
地下水排泄/氡/水量平衡/荆江/长江中游/水文地质学Key words
groundwater discharge/radon/water balance/Jingjiang River/middle reach of the Yangtze River/hydrogeology引用本文复制引用
基金项目
湖北省科技计划项目(2020BCA088)
出版年
2024
NETL
NSTL
万方数据