摘要
上海地区地下水流系统是长江三角洲系统的一个子系统,但由于河口三角洲这一独特环境,使其独具特征.第四纪海平面的升降与河口三角洲沉积两种作用此消彼长,成为主导本区地下水流系统形成与演化的重要因素,地下水主要通过大气降水的淡化稀释作用、越流混合作用和阳离子交换作用进行化学演化.研究表明,各含水层无论封闭程度、水动力特征、水化学特征及其演化方式,均有明显不同,据此在研究区划分出三个地下水流系统.
Groundwater flow system of Shanghai area is part of regional flow system of Yangtze River delta;however,it has its own characteristics due to special environment of estuarine delta.Interaction of Quaternary sea-level fluctuation and estuarine delta sendimentation had played important roles in affecting formation and chemical evolution of groundwater.There are mainly three ways of groundwater chemical evolution: dilution by atmospheric precipitation,mixture of different waters through leaky system,and exchange of cation.Study reveals that the obvious differences exist for different aquifers in term of deepness,hydraulic dynamic,and chemical characteristics and evolution,so three groundwater flow system is divided in study area.
出处
《石家庄师范专科学校学报》
2004年第6期57-61,共5页
Journal of Shijiazhuang Teachers College
关键词
上海
地下水流系统
水化学
水动力
第四系
groundwater flow system
water chemical evolution
Shanghai region
