中国海洋大学学报（自然科学版）2025，Vol.55Issue(3)：104-115,12.DOI:10.16441/j.cnki.hdxb.20240042
地下坝上游非均质含水层残留咸水淡化过程研究
Study on the Desalinization Process of Residual Saltwater in Heterogeneous Aquifer Upstream of Subsurface Dam
摘要
Abstract
Widespread use of subsurface dams as an effective control mechanism may lead to residual saltwater in landward directions and limit the exploitation of groundwater.However,most of the cur-rent studies neglect the influence of heterogeneity,or are limited to laboratory scale.In this paper,the seawater intrusion process before and after the construction of subsurface dams under different layered heterogeneous conditions was simulated by a site-scale numerical model.The effects of different layered heterogeneous conditions on the desalination process of residual saltwater and groundwater discharge process are discussed by taking the wedge regression rate of residual saltwater,the removal rate of re-sidual total salt and the percentage of groundwater discharge as indexes.The results show that the change of hydraulic conductivity of the lower aquifer has a significant influence on the regression effect of residual saltwater.The larger the value of low permeability layer,the faster the regression rate.However,the thickness of low permeability layer has little influence on the desalination process of resid-ual saltwater.关键词
海水入侵/层状非均质/地下坝/残留咸水/地下水排泄/数值模拟Key words
seawater intrusion/layered heterogeneity/subsurface dam/residual saltwater/groundwa-ter discharge/numerical simulation分类
天文与地球科学引用本文复制引用
曹燃,郑天元,张博,郑西来..地下坝上游非均质含水层残留咸水淡化过程研究[J].中国海洋大学学报（自然科学版）,2025,55(3):104-115,12.基金项目
国家自然科学基金项目(42272282,42202270)资助Supported by the National Natural Science Foundation of China(42272282,42202270) （42272282,42202270）
