黄河刁口河湿地浅层地下水水化学分区及其形成过程

Chemical Zoning of Shallow Groundwater in the Diaokou River Wetland of the Yellow River and Its Formation Process

由于水文地质条件的差异,刁口河湿地浅层地下水水化学特征在空间分布上具有明显特征。本文对刁口河湿地220个地下水样本进行了水化学分析,通过离子比、Piper图、Gibbs图等方法,结合水文地质条件,确定了海水-混合区、蒸发-盐水区和风化-淡水区三种水文地质化学区。结果表明,海水-混合区水化学类型主要受蒸发和海水混合相互作用,水化学成分主要来自冲积海相平原区蒸发岩风化;蒸发-盐水区水化学类型主要受蒸发作用控制,水化学成分主要来自过渡区硅酸盐风化;风化-淡水区水化学类型主要受水-岩相互作用控制,水化学成分主要来自碳酸盐矿物和硅酸盐矿物溶解。研究成果可为刁口河水资源管理和湿地恢复方案的优化提供参考。

Due to differences in hydrogeological conditions,the chemical characteristics of shallow groundwater in the Diaokou River wetland exhibit distinct spatial distribution patterns.This paper analyzes the hydrochemical characteristics of 220 groundwater samples from the Diaokou River wetland using methods such as ion ratios,Piper diagrams,and Gibbs diagrams,combined with hydrogeological conditions.Three hydrogeochemical zones are identified:seawater-mixed zone,evaporation-saline zone,and weathering-freshwater zone.Results indicate that the seawater-mixed zone’s hydrochemical type is mainly influenced by evaporation and seawater mixing interactions,with chemical components primarily derived from the weathering of evaporites in the alluvial marine plain area.The evaporation-saline zone’s hydrochemical type is mainly controlled by evaporation,with components primarily from the weathering of silicates in the transition zone.The weathering-freshwater zone’s hydrochemical type is primarily controlled by water-rock interactions,with components mainly sourced from the dissolution of carbonate and silicate minerals.The findings can provide references for optimizing water resource management and wetland restoration plans in the Diaokou River area.