天津市深层淡水井的水质咸化分类——以东丽区为例

第四系第Ⅱ含水组地下水经长期开采,早已完成主固结过程;开采Ⅱ组地下水可使上覆咸水淡化越流,最终加快各类地表水的入渗,多年来在适宜地段大幅恢复Ⅱ组地下水的开采。经调查大部分水井水质恶化非含水层水质变化,绝大多数地区咸水底界没有下移趋势。笔者认为在滨海平原区能使咸、淡水保持数10万年高浓度差的粘土层,具有半透膜特性。由于部分观点与前人研究结果相左,澄清"井水咸化"与地下水咸化污染的区分就显得尤为重要。为此,将多年地下水水质调查资料进行分类,推进咸化污染机理研究推进。

Classification of Water Saltilization in the Deep Fresh-water Well in Tianjin-Take Dongli District for Example

For a long exploitation of groundwater in the aquifer II of Tertiary period,the stratum concretion process has been finished.Rationally increasing the mining the groundwater of aquifer II will lead to the leakage recharge from salty layers to fresh aquifers.According to investigation,most well pollution reports was not caused by the aquifer pollution and most area didn't have the direction of salt water bottom moving down.It is considered by the writer that the clay stratum which can keep high concentration...