CAJ | 학술논문

在广东省湛江市深层承压水开采过程中,在开采区内形成了区域水位降落漏斗.降落漏斗的形成对深层承压水的化学特性产生了一些影响,具体表现为:西部和西北部铁含量低,北部铁含量高,降落漏斗附近铁含量中等.对降落漏斗内深层承压水铁分布进行演化模拟计算,结果表明,降落漏斗内深层承压水的补给可能来自北部高铁承压水、西部和西北部低铁承压水以及浅层承压水.深层承压水由这些地下水混合而成,高铁地下水是主要补给来源.降落漏斗中心区深层承压水的大量人工开采导致其铁含量升高.地下水在向降落漏斗中心区的径流过程中,不但发生了方解石、白云石和赤铁矿的溶解作用以及菱铁矿和水绿矾的沉淀作用,而且发生了Na~+与Ca~(2+)的交换、铁氧化-还原反应等一系列复杂的水-岩作用.
재광동성담강시심층승압수개채과정중,재개채구내형성료구역수위강락루두.강락루두적형성대심층승압수적화학특성산생료일사영향,구체표현위:서부화서북부철함량저,북부철함량고,강락루두부근철함량중등.대강락루두내심층승압수철분포진행연화모의계산,결과표명,강락루두내심층승압수적보급가능래자북부고철승압수、서부화서북부저철승압수이급천층승압수.심층승압수유저사지하수혼합이성,고철지하수시주요보급래원.강락루두중심구심층승압수적대량인공개채도치기철함량승고.지하수재향강락루두중심구적경류과정중,불단발생료방해석、백운석화적철광적용해작용이급릉철광화수록반적침정작용,이차발생료Na~+여Ca~(2+)적교환、철양화-환원반응등일계렬복잡적수-암작용.
A regional depression cone exists in groundwater level in the deep confined water owing to a long-term exploitation of groundwater in Zhanjiang, Guangdong. The formation of the depression cone has a certain effect on the chemical nature of groundwater in the deep confined water, resulting in low concentration of Fe in the western and northwestern parts, high concentrations of Fe in the northern part and medium concentrations of Fe near the center of the depression cone. Geochemical simulation was carried out for the Fe occurrence in groundwater in the depression cone. The results show that groundwater in the depression cone in the deep confined water may be supplied from groundwater in the north, northwest and west, or from groundwater in the shallow confined aquifers.Groundwater in the deep confined water is a mixture of the supplied groundwater, and the high Fe groundwater is a main source. Groundwater exploitation of large quantity in the deep confined water causes an increase in Fe contents in the groundwater. In the course of groundwater towards the center of the depression cone, not only the dissolution of calcite, dolomite and hematite, the precipitation of siderite and melanterite may occur, but also the cation exchange between Na~+ and Ca~(2+), Fe oxidation-reduction of Fe may occur.