摘要
新疆焉耆盆地平原区地下水呈碱性环境,用PHREEQC软件中反向水文地球化学模拟的方法对此演化机理做了水-岩作用模拟。模拟结果表明:研究区潜水、浅层承压水及深层承压水在地下水流动方向上由上游至下游的演化过程中基本以石膏、方解石等矿物的溶解;白云石等的沉淀以及阳离子交换作用为主。从研究区上游往下,水中矿物相迁入、迁出的数量逐渐增大,水-岩作用逐渐增强。得到的结论有:矿物相的溶解析出和阳离子交换作用共同控制着演化,焉耆盆地平原区地下水由浅至深阳离子交换作用越来越强烈;各模拟路径物质转移量阳离子交换作用比溶解沉淀作用多2~5个数量级,说明阳离子交换作用强于溶解沉淀作用。
Groundwater environment in the plain area of Yanqi Basin of Xinjiang were alkaline.The water-rock interaction was simulated by method of reverse simulation in PHREEQC software to study its mechanism.The simulation results indicate that the process of phreatic water,shallow and deep confined water evolution from upstream to downstream mainly contains the dissolution of gypsum and calcite,the sediment of dolomite and cation exchange.The dissolution/precipitation amount of min-erals in groundwater increases gently in study area from upstream to downstream.The water-rock interaction gradually increases.It got the two conclusions that the dissolution/precipitation of minerals and positive ion exchange control the evolution;cation exchange function of groundwater is more and more strong from shallow to deep in the plain area of Yanqi Basin,and cation exchange effect is stronger than dissolving precipitation effect because of magnitude of cation exchange effect is 2~5 orders more than dissolving precipitation effect.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2017年第10期65-70,共6页
Journal of Arid Land Resources and Environment
基金
中国地质调查局项目(1212011220982)
新疆自治区水文学及水资源重点学科基金(xjswszyzdxk20101202)资助
关键词
反向水文地球化学模拟
水-岩作用
地下水
新疆焉耆盆地平原区
reverse hydrogeochemical simulation
water - rock interaction
groundwater
plain area of YanqiBasin of Xinjiang
