摘要
为了探究咸淡水交互带空间分布和动态变化特征,基于莱州湾南岸某典型剖面的地下水实测数据,建立二维变密度地下水数值模型,并采用电阻率层析成像技术进行校正;选用咸淡水交互带宽度、咸水趾和2个典型监测井水头数据作为评价指标,分析不同地下水开采情景、极端气候情景下典型剖面咸淡水交互带动态变化特征。结果表明:在现状条件下,研究区地下水淡水区水位下降,卤水区水位上升,咸水入侵有所减缓并呈向海边后退的趋势;在不同地下水开采情景下,随着开采量的增加,上部交互带宽度逐渐减小,下部交互带宽度快速减小到某一宽度后缓慢增加,咸水趾呈现向内陆入侵的趋势;在极端气候情景下,降雨补给使淡水区水头在初期上升后逐渐下降,而持续干旱导致淡水区水头持续下降,降雨量变化显著影响上部交互带宽度,且极端降雨情景对减缓咸水入侵的作用更为显著。
To investigate the spatial distribution and dynamic characteristics of the saltwater-freshwater interaction zones,a two-dimensional variable-density groundwater numerical model was established based on the measured groundwater data of a typical section on the south coast of Laizhou Bay,and calibrated by using the resistivity tomography method.By selecting the width of the brackish water interaction zone,the position of saltwater toe,and the water level data of two typical monitoring wells as evaluation indicators,the dynamic variation characteristics of the saltwater-freshwater interaction zone under different groundwater extraction scenarios and extreme climate scenarios were analyzed.The results show that under current conditions,the water level in the freshwater zone in the study area declines,while the water level in the brine zone rises,the saltwater intrusion is alleviated and shows a retreating trend toward the seaside.Under different groundwater extraction scenarios,with the increase of extraction volume,the width of the upper interaction zone gradually decreases,while the width of the lower interaction zone decreases rapidly to a certain width and then increases slowly,and the saltwater toe shows a trend of intrusion toward inland.Under extreme climate scenarios,rainfall recharge causes the water head in the freshwater zone to rise initially and then gradually decline,while continuous drought leads to a continuous decline of the water head in the freshwater zone.The variation in rainfall significantly affects the width of the upper interaction zone,and extreme rainfall scenarios have a more significant effect in alleviating saltwater intrusion.
作者
李嘉兴
吴光伟
董玉龙
王晓玮
胡晓农
支传顺
杨帆
赵云平
LI Jiaxing;WU Guangwei;DONG Yulong;WANG Xiaowei;HU Xiaonong;ZHI Chuanshun;YANG Fan;ZHAO Yunping(School of Water Conservancy and Environment,University of Jinan,Jinan 250022,Shandong,China;Shandong Provincial Territorial Spatial Ecological Restoration Center,Jinan 250014,Shandong,China)
出处
《济南大学学报(自然科学版)》
北大核心
2026年第2期194-204,共11页
Journal of University of Jinan(Science and Technology)
基金
山东省自然科学基金项目(ZR2024QD169)
山东大学“新高校20条”引进创新团队项目(2021GXRC070)
山东省高等学校青创科技支持计划项目(2023KJ318)
山东省国土空间生态修复中心项目(SDGP370000000202402001402001)。
关键词
地下水
咸水入侵
咸淡水交互带
数值模拟
电阻率层析成像
莱州湾南岸
groundwater
saltwater intrusion
saltwater-freshwater interaction zone
numerical simulation
electrical resistance tomography
southern coast of Laizhou Bay
