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白洋淀湿地地下水系统水化学变化特征及演化模式
投稿时间:2020-08-03  修订日期:2020-10-18  点此下载全文
引用本文:
DOI:10.19762/j.cnki.dizhixuebao.2021061
摘要点击次数: 52
全文下载次数: 65
作者单位地址
郭小娇 中国地质科学院水文地质环境地质研究所 河北省石家庄市中华北大街268号
王慧玮 中国地质科学院水文地质环境地质研究所 
石建省 中国地质科学院水文地质环境地质研究所 河北省石家庄市中华北大街268号
王伟 中国地质调查局自然资源航空物探遥感中心 
中文摘要:在气候变化和人类活动影响下探究区域地下水系统水化学特征及演化规律,对于揭示地下水循环变化、水资源安全与管理、区域生态环境保护等具有重要作用。本研究以白洋淀湿地地区为研究对象,通过对比分析地表水、地下水水化学特征及空间分布规律,研究了白洋淀地区地下水系统水化学演化作用及分区模式。研究结果表明白洋淀地区地表水、地下水水化学具有明显的空间变化特征,河流水化学及水动力条件很大程度上控制着湿地、浅层地下水水化学类型、分布规律及演化作用。与瀑河、府河、白沟引渠水力联通较好的藻窄淀、宋庄淀、留通淀TDS较低,水化学类型主要为HCO3-Ca·Na·Mg、HCO3·Cl-Na·Ca、HCO3·Cl-Na·Mg·Ca型水;沿径流流动方向,湿地水化学类型由HCO3·Cl-Na·Mg型演化为HCO3·Cl-Na型;湿地水化学主要受到蒸发作用、阳离子交换和碳酸盐沉淀作用的影响。浅层地下水水化学类型主要为HCO3-Mg?Na、HCO3-Na?Mg,受人类活动影响严重的地区浅层地下水水化学类型为Cl?HCO3-Na?Mg、Cl?HCO3-Ca?Mg?Na;局部地下水降落漏斗区水化学类型为HCO3·SO4-Na、HCO3·SO4·Cl-Na、SO4·HCO3-Na·Mg、SO4-Na,与人类活动和地下水越流补给咸水混合作用有关。白洋淀湿地浅层地下水系统具有分区演化模式,存在七个亚区系统。Ⅰ?Ⅳ区浅层地下水水质较好,TDS较低,地下水离子主要来源于碳酸岩、蒸发岩和硅酸盐岩矿物风化溶解,受到水-岩相互作用、蒸发作用、阳离子交换和碳酸盐沉淀作用的影响。西南部及下游地区Ⅴ?Ⅶ区受到人类活动污染影响,地下水TDS较高,地下水离子主要来源于蒸发岩、硅酸盐矿物风化溶解和人类活动污染输入,蒸发浓缩、混合作用、碳酸盐沉淀和阳离子交换作用是控制地下水演化的主要因素。
中文关键词:白洋淀湿地  水化学类型  空间变化  水化学分区  演化模式
 
Hydrochemical characteristics and evolution pattern of groundwater system in Baiyangdian Wetland, North China Plain
Author NameAffiliationAddress
Guo Xiaojiao Institute of Hydrogeology and Environmental Geology, CAGS 河北省石家庄市中华北大街268号
Wang Huiwei Institute of Hydrogeology and Environmental Geology 
Shi Jiansheng Institute of Hydrogeology and Environmental Geology 河北省石家庄市中华北大街268号
Wang Wei Institute of Hydrogeology and Environmental Geology 
Abstract:To examine the hydrochemical characteristics and evolution patterns of regional groundwater system under the influence of climate change and human activies, it plays an important role in revealing groundwater cycle changes, water resource safety and management, and regional eco-environmental conservation. In this study, We analyzed and compared the hydrochemical characteristics and spatial distribution between surface water and groundwater, and investigated the hydrochemical evolution and zoning patterns of groundwater system in Baiyangdian Wetland, North China Plain. The results show that hydrochemistry of both surface water and groundwater has a significant spatial variation characteristics. Hydrochemical characteristics and hydrodynamic condition of river water largely control the hydrochemical types and evolution of wetlands and shallow groundwater. Wetlands water in Zhaozai, Songzhuang and Liutong has low TDS, which have good hydraulic connection with inflow river of Puhe, Fuhe and Baigou, and the hydrochemical facies are of HCO3-Ca·Na·Mg, HCO3·Cl-Na·Ca, HCO3·Cl-Na·Mg·Ca water types. Alone flow paths from north to south, the major hydrochemical types of wetland water change from HCO3·Cl-Na·Mg to HCO3·Cl-Na type in the southern wetlands, due to the intense evaporation. Wetland chemical evolution is mainly controlled by evaporation, cation exchange processes and calcite precipitation. The major hydrochemical facies of shallow groundwater are HCO3-Mg?Na, HCO3-Na?Mg type, while it is dominated by the Cl?HCO3-Na?Mg, Cl?HCO3-Ca?Mg?Na water type in the areas seriously affected by human activities. In the local groundwater depression area, groundwater belongs to the HCO3·SO4-Na, HCO3·SO4·Cl-Na, SO4·HCO3-Na·Mg, SO4-Na water types, which is closely related to anthropogenic activities and saline water mixing effect drived from groundwater overflow recharge. The shallow groundwater system of Baiyangdian Wetland was characterized by hydrochemical zoning evolution patterns, which was divided into seven subzone system. The major ions inⅠ?Ⅳ suzones were mainly derived from the dissolution of carbonate, evaporite and silicate mineral weathering dissolution, characterized by good water quality and low TDS values. The groundwater evolution was primarily controlled by water-rock interaction, evaporation, cation exchange and calcite precipitation. The shallow groundwater subzone system of Ⅴ?Ⅶ in the southwest wetlands and the lower reaches had been influenced by human activities, the major ions were the most attributed to evaporite, silicate weathering dissolution and contamination inputs from anthropogenic activities. Evaporation concentration, mixing effect, calcite precipitation and cation exchange are the main factors in controlling the groundwater evolution process.
keywords:Baiyangdian Wetland  Hydrochemical facies  Spatial variation  Hydrochemical zoning  Evolution pattern
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