摘要
从研究应用背景、基础理论及模型、实验模拟等方面就微咸水灌溉过程,侵入界面土壤渗透性变化进行分析研究。以衡水典型研究区微咸水分布及水质矿化度分析数据为基础,应用地球化学模式PHREEQC,结合水敏性机理分析矿物迁移的存在形式及各种形式之间的转化关系。结果表明:含高价离子农灌微咸水加快粘土胶体颗粒絮凝沉降能力强于低价离子,侵入过程矿化度梯度增加的同时渗透性降低,反向地球化学模拟表明粘土矿物大量参与水岩反应发生迁移转化。
The permeability variation of the invasion interface of saltwater-freshwater was studied by the basic theory,application analysis and experiment simulation.We analyzed the division and salinity of brackish water in Hengshui region.According to the water sensitivity analysis,PHREEQC was applied to simulate the processes of mineral transport and transformation.The results indicated that high valence ion in brackish water exhibits better performance in the aspect of flocculation sedimentation for colloidal particles.With the permeability reducing,salinity gradient increases.The inverse geochemical modeling of the water-rock interaction shows massive clay minerals participate in the process.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2011年第3期161-165,共5页
Journal of Arid Land Resources and Environment
基金
国家重点基础研究发展计划("973"子课题)(2010CB428802)
所控基金(SK07010)资助
关键词
侵入界面
胶体絮凝
水岩反应
PHREEQC反向模拟
invasion interface
colloid flocculation
water-rock interaction
PHREEQC inverse modeling
