CAJ | 학술논문

广西北海市滨海平原松散沉积物中分布有潜水含水层和承压含水层,天然条件下地下水的pH 值普遍偏低,一般为4.5～6.5,最低3.33,且地下水的pH值在时空上呈现出一定规律的分布:在垂向上呈现由潜水-浅部承压水-深部承压水逐步降低的序列,在平面上地下水的pH值向海域方向略为减小;在时间上,pH值随季节上下波动,一般在雨季略高于旱季.一定酸度的大气降水,土壤矿物与化学成分,含水层的岩性、介质成分和结构等,是偏酸性地下水形成的物质基础,水循环状况则是偏酸性地下水形成的动力条件.
엄서북해시빈해평원송산침적물중분포유잠수함수층화승압함수층,천연조건하지하수적pH 치보편편저,일반위4.5～6.5,최저3.33,차지하수적pH치재시공상정현출일정규률적분포:재수향상정현유잠수-천부승압수-심부승압수축보강저적서렬,재평면상지하수적pH치향해역방향략위감소;재시간상,pH치수계절상하파동,일반재우계략고우한계.일정산도적대기강수,토양광물여화학성분,함수층적암성、개질성분화결구등,시편산성지하수형성적물질기출,수순배상황칙시편산성지하수형성적동력조건.
Phreatic and confined aquifers are found in the unconsolidated sediments in coastal plain of Beihai, Guangxi. Under natural condition,pH of groundwater in the aquifers is low,ranging commonly from 4.5 to 6.5, and the minimum value is 3.33. It is found that the pH value of groundwater presents the regularity distribution with time and space. In vertical direction, pH value presents the sequence of gradually decrease from phreatic water,shallow confined water to deep-confined water. It decreases from land-area to sea-area. The pH value presents the characteristics of seasonal fluctuation. Usually it is higher in rainy season than in dry season. The genesis of the weak acidic groundwater is a certain acidity of atmospheric precipitation,lithology, media components and frame of aquifer,mineral and chemical composition in soil.The water circulation is the dynamic factor of acidic groundwater.