Assessing groundwater vulnerability in bedrock islands using the modified GALDIT method
文献类型：期刊论文
| 作者 | Gong, Rong1,2,3,4,5; Han, Dongmei2,5; Friborg, Thomas1; Zhang, Kang2,5 |
| 刊名 | JOURNAL OF HYDROLOGY
 |
| 出版日期 | 2026-03-01 |
| 卷号 | 667页码:134905 |
| 关键词 | Bedrock islands Groundwater vulnerability Seawater intrusion GALDIT method |
| ISSN号 | 0022-1694 |
| DOI | 10.1016/j.jhydrol.2026.134905 |
| 产权排序 | 1 |
| 文献子类 | Article |
| 英文摘要 | Groundwater vulnerability in bedrock islands is a critical issue due to limited freshwater storage, complex recharge pathways, and sensitivity to climatic variability and anthropogenic pressures. Current assessments often fail to capture the spatial and temporal variability of these aquifers, and the responses to groundwater regulation remain poorly understood. This study develops a novel hybrid framework that integrates a 3D variable-density groundwater flow and solute transport model with a modified GALDIT index to assess groundwater vulnerability from 2010 to 2040. Take the Changshan Islands of north China as an example, where groundwater abstraction was banned in October 2019. The model simulates groundwater levels and Cl concentrations, which are used to derive vulnerability indicators and refine their weights using the analytical hierarchy process. The results indicate that net seawater/saltwater intrusion (SWI) prevailed before 2019. Still, after the pumping ban, it was gradually replaced by coastal submarine groundwater discharge (SGD), with high-concentration zones contracting and low-concentration zones expanding. However, the SWI front remained beyond 300 m by 2040, highlighting the limited effectiveness of abstraction-only policies. The vulnerability assessment identified 19.9 % of the area as highly vulnerable, mostly in coastal zones characterized by elevated salinity and strong landward hydraulic gradients. Salinity remains high in these zones despite groundwater level recovery, indicating delayed hydrochemical response and sustained vulnerability. This integrated approach serves as a reference for sustainable groundwater management and protection of the water environment in bedrock islands. |
| URL标识 | 查看原文 |
| WOS关键词 | SEAWATER INTRUSION ; WATER ; POLLUTION ; DYNAMICS ; AQUIFERS |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:001667883100001 |
| 出版者 | ELSEVIER |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/219698]  |
| 专题 | 陆地水循环及地表过程院重点实验室_外文论文 |
| 通讯作者 | Han, Dongmei |
| 作者单位 | 1.Univ Copenhagen, Dept Geosci & Nat Resource Management, DK-1350 Copenhagen, Denmark 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Water Cycle & Related Land Surface Proc, Beijing 100101, Peoples R China; 3.Univ Chinese Acad Sci, Sino Danish Coll, Beijing 101408, Peoples R China; 4.Sino Danish Ctr Educ & Res, Beijing 101408, Peoples R China; 5.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Gong, Rong,Han, Dongmei,Friborg, Thomas,et al. Assessing groundwater vulnerability in bedrock islands using the modified GALDIT method[J]. JOURNAL OF HYDROLOGY,2026,667:134905. |
| APA | Gong, Rong,Han, Dongmei,Friborg, Thomas,&Zhang, Kang.(2026).Assessing groundwater vulnerability in bedrock islands using the modified GALDIT method.JOURNAL OF HYDROLOGY,667,134905. |
| MLA | Gong, Rong,et al."Assessing groundwater vulnerability in bedrock islands using the modified GALDIT method".JOURNAL OF HYDROLOGY 667(2026):134905. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。