| 衡水市桃城区浅层地下水咸化成因 |
| 摘要点击 1217 全文点击 445 投稿时间：2022-08-15 修订日期：2022-11-04 |
| 查看HTML全文
查看全文 查看/发表评论 下载PDF阅读器 |
| 中文关键词 浅层地下水 水化学 同位素 咸化成因 衡水市 |
| 英文关键词 shallow groundwater hydrochemistry isotope salinization mechanism Hengshui City |
|
| 中文摘要 |
| 为了解衡水市桃城区浅层咸水特征及成因,通过分析典型钻孔易溶盐以及浅层地下水(井深 ≤ 100 m)的水化学及氢氧稳定同位素数据,对浅层地下水补给来源和咸化过程进行了研究. 结果表明:研究区浅层地下水为弱碱性咸水,TDS变化范围176.06~17569.65 mg ·L-1,钻孔全盐量为1.830~6.509 g ·kg-1,易溶盐水化学与浅层水化学类型相似,均为SO4 ·Cl-Na ·Mg型和Cl ·SO4-Na ·Ca型.不同时期的大气降水是浅层地下水的主要补给来源.地下水中盐分主要来源于岩盐及硫酸盐矿物的溶解; 同时蒸发作用和还原环境对于地下水盐分的积累也有一定贡献,但地下水咸化过程受到人类活动及海水入侵的影响较小. |
| 英文摘要 |
| In order to understand the characteristics and origin of groundwater salinization in Taocheng district of Hengshui City, the recharge and salinization procession of shallow groundwater were analyzed with isotopic and geochemical data of the shallow groundwater (buried depth ≤ 100 m) and the soluble salt in boreholes. The results showed that the shallow groundwater was weak alkaline salt water, with the total dissolved solid (TDS) in the groundwater ranging from 176.06 to 17569.65 mg·L-1and the soil total salinity in unconsolidated sediments ranging from 1.830 to 6.509 g·kg-1. The hydrochemical types were mainly SO4·Cl-Na·Mg and Cl·SO4-Na·Ca in the shallow groundwater and the soluble salt. The main recharge resource of shallow groundwater was precipitation with different geological periods. The hydrochemical compositions of shallow groundwater mainly came from the dissolution of halite and sulfate weathering and experienced intense evaporation and the reduction environment. Meanwhile, the groundwater salinization was barely affected by human activities and seawater intrusion. |
|
|
|
