水文地质工程地质2025，Vol.52Issue(1)：1-11,11.DOI:10.16030/j.cnki.issn.1000-3665.202408027
非等温条件下截渗工程对海底地下水排泄的影响研究
Effect of cut-off walls on submarine groundwater discharge in non-isothermal conditions
摘要
Abstract
Temperature could change the migration characteristics of coastal groundwater.However,research on groundwater discharge processes under the influences of cut-off walls has been limited to isothermal conditions.This study built a two-dimensional numerical model coupling groundwater flow and salt transport in non-isothermal conditions at the site scale to investigate the impact of cut-off walls on groundwater discharge processes,considering the thermal effect.We focused on the dynamic characteristics of submarine groundwater discharge in non-isothermal conditions which are common in reality.This research quantitatively assessed the influence of seawater temperature on groundwater discharge flux(Q)and relative discharge flux(Q').The results indicate that,under high-temperature seawater conditions,the timescale for Q'to reach equilibrium is significantly reduced.Specifically,higher freshwater temperatures and lower seawater temperatures could result in a greater Q'.However,when the seawater temperature exceeded the groundwater temperature by 15℃,reverse circulation is more likely to develop in the saltwater zone,which accelerates groundwater circulation and increases the total groundwater discharge into the sea,resulting in a corresponding rise in the Q'value.This study is significant for cut-off wall structure optimization and coastal groundwater sustainable utilization.关键词
海水入侵/热效应/滨海含水层/数值模拟Key words
seawater intrusion/thermal effect/coastal aquifer/numerical simulation分类
天文与地球科学引用本文复制引用
郑天元,辛晓,王和,高绍博,刘乐成,张博,郑西来,罗剑..非等温条件下截渗工程对海底地下水排泄的影响研究[J].水文地质工程地质,2025,52(1):1-11,11.基金项目
国家自然科学基金项目(42272282) （42272282）
