摘要
利用廊坊城区2019年水质、历史水质及典型监测点水质水位数据,结合水文地质条件、开采活动等对研究区水质演化特征进行分析。结果表明:①研究区深层地下水偏碱性,属于淡水,TDS空间分布稳定,深层地下水中可能存在局部氮素污染,污染较轻。氟化物含量普遍较高,且空间分布不均匀。耗氧量空间差异性较强,可能存在局部有机污染。②自有监测资料以来至今,研究区深层地下水由重碳酸氯化物型向重碳酸型水转变;水化学类型、TDS及氟化物的变化主要发生在深层承压含水层开采漏斗区。③深层地下水典型监测点中的总硬度和TDS随时间总体呈缓慢上升再趋于平稳的演变规律,氟化物呈波动变化上升。地下水开采与深层地下水咸化、硬化及氟化物含量增加密切相关。
Using groundwater quality data from 2019,historical water quality data,and water level data from typical monitoring points in the urban area of Langfang,this study analyzes the evolution characteristics of groundwater quality in the study area considering hydrogeological conditions and mining activities.The results show that:The deep groundwater in the study area is alkaline,classified as fresh water,with stable spatial distribution of TDS.There may be localized nitrogen pollution in deep groundwater,but it is relatively mild.Fluoride content is generally high and unevenly distributed spatially.Oxygen consumption shows strong spatial variability,indicating potential localized organic pollution.②Since the availability of monitoring records,the deep groundwater in the study area has shifted from a bicarbonate-chloride type to a bicarbonate type;changes in water chemistry types,TDS,and fluoride mainly occur in the funnel areas of deep confined aquifers due to over-extraction.In typical monitoring points of deep groundwater,total hardness and TDS have generally shown a pattern of slow increase followed by stabilization over time,while fluoride levels have fluctuated upward.Groundwater extraction is closely related to the salinization,hardening,and increased fluoride content of deep groundwater.
作者
李堃正
张凯
张旭虎
朱小龙
王子逸
Li Kunzheng;Zhang Kai;Zhang Xuhu;Zhu Xiaolong;Wang Ziyi(Hebei Institute of Environmental Geology Exploration,Shijiazhuang 050021,Hebei;Hebei Key Laboratory of Geological Resources and Environmental Monitoring and Protection,Shijiazhuang 050021,Hebei;Langfang Ecological Environment Bureau,Langfang 065000,Hebei;Hebei Institute of Geophysical Exploration,Langfang 065000,Hebei)
出处
《陕西水利》
2025年第3期100-103,共4页
Shaanxi Water Resources
基金
国家科技基础资源调查专项(2017FY100405)。
关键词
水质演化
开采条件
氟化物
Water quality evolution
mining conditions
fluoride
