中新天津生态城孔隙水化学垂向分布及其成因

doi:10.13278/j.cnki.jjuese.20180076

吉林大学学报(地球科学版) ›› 2019, Vol. 49 ›› Issue (4): 1109-1120.doi: 10.13278/j.cnki.jjuese.20180076

中新天津生态城孔隙水化学垂向分布及其成因

曹阳¹, 申月芳¹, 焦志亮², 翟远征³, 杨耀栋¹

1. 天津市地质矿产测试中心, 天津 300191;
2. 天津市勘察院, 天津 300191;
3. 北京师范大学水科学研究院, 北京 100875

收稿日期:2018-05-12 出版日期:2019-07-26 发布日期:2019-07-26
通讯作者: 翟远征(1983-),男,副教授,博士,主要从事地下水水化学演化、同位素水文地质学和地下水污染风险相关研究,E-mail:diszyz@163.com E-mail:diszyz@163.com
作者简介:曹阳(1983-),女,博士,主要从事地下水环境演化、水文地球化学相关研究,E-mail:caoy84@163.com
基金资助:
国家自然科学基金项目（41877174）；中国地质科学院水文地质环境地质研究所联合开放基金（KF201510）；天津市矿产资源补偿费项目（国土房任[2014]22）

Pore Water Vertical Chemistry Distribution and Origin Analysis in Sino-Singapore Tianjin Eco-City

Cao Yang¹, Shen Yuefang¹, Jiao Zhiliang², Zhai Yuanzheng³, Yang Yaodong¹

1. Tianjin Geological Mineral Testing Center, Tianjin 300191, China;
2. Tianjin Institute of Geotechnical Investigation Surveying, Tianjin 300191, China;
3. College of Water Sciences, Beijing Normal University, Beijing 100875, China

Received:2018-05-12 Online:2019-07-26 Published:2019-07-26
Supported by:
Supported by National Natural Science Foundation of China(41877174),Joint Foundation of Key Laboratory of Institute of Hydrogeology and Environmental Geology, CAGS (KF201510) and Tianjin Mineral Resources Compensation Project(File[2014]22)

摘要/Abstract

摘要： 中新天津生态城是典型的海岸带建设城市，其复杂的水文地质条件制约着地下空间建设。为查清地下空间水质的垂向分布情况，利用中新天津生态城11个深度为40.0 m的钻孔采取不同深度的原状土样，并采用气体压榨法得到土样中的孔隙水样品，对孔隙水的pH值，总硬度，TDS、K⁺、Na⁺、Ca²⁺、Mg²⁺、CO₃^2-、HCO₃^-、SO₄^2-、Cl^-、Sr、Br质量浓度，Cl/Br，γNa/γCl及⁸⁷Sr/⁸⁶Sr等水化学和同位素参数进行了测试分析。结果显示，孔隙水中水化学成分的质量浓度存在显著的垂向差异（最大相差4倍）：受潮滩生卤影响，北部除HCO₃^-外，其他所有离子最大质量浓度出现在地下5.0 m左右；受地表水影响，中部与南部Cl^-最大质量浓度出现在埋深15.0 m左右，其余离子分布规律与Cl^-基本一致。水化学和同位素特征联合表明，埋深小于20.0 m的孔隙水表现出明显的现代海水特征，说明其主要受现代海水影响；埋深大于20.0 m的孔隙水化学特征受现代海水和水岩相互作用综合影响，且受古沉积水影响明显。

关键词: 孔隙水, 水化学特征, 垂向分布, 成因分析, 中新天津生态城

Abstract: The Sino-Singapore Tianjin Eco-city is a typical coastal city. Its complex hydrogeological conditions restrict the construction of underground space. In order to find out the vertical distribution of underground water quality, soil samples were collected from 40 m boreholes. The pore water in the core was obtained through gas squeezing. pH, total hardness, TDS, K⁺, Na ⁺, Ca^{2 +}, CO₃^2-, HCO₃^-, SO₄^2-, Cl^-, Sr, Br, Cl/Br,γNa/γCl and ⁸⁷Sr/⁸⁶Sr were used to discuss the chemical characteristics and influence factors of pore-water. The results show that the vertical mass concentration is significantly different in chemical composition of pore water, the highest value is four times of the lowest one. In the northern area, affected by brines formed by seawater evaporation on coastal beach, the ion maximum concentration (except HCO₃^-) appears in the depth of 5.0 m underground; while in the central and southern area, affected by surface water, the maximum of Cl^-appears in the depth of about 15.0 m, and those of other ions are similar. The pore water within 20.0 m shows the obvious characteristics of modern seawater. The pore water chemistry below 20.0 m is controlled by water and rock interactions, and is significantly affected by paleo-sedimentary seawater.

Key words: pore water, hydrochemistry characteristics, vertical distribution, genetic analysis, Sino-Singapore Tianjin Eco-City

中图分类号:

P641

曹阳, 申月芳, 焦志亮, 翟远征, 杨耀栋. 中新天津生态城孔隙水化学垂向分布及其成因[J]. 吉林大学学报(地球科学版), 2019, 49(4): 1109-1120.

Cao Yang, Shen Yuefang, Jiao Zhiliang, Zhai Yuanzheng, Yang Yaodong. Pore Water Vertical Chemistry Distribution and Origin Analysis in Sino-Singapore Tianjin Eco-City[J]. Journal of Jilin University(Earth Science Edition), 2019, 49(4): 1109-1120.

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中新天津生态城孔隙水化学垂向分布及其成因

Pore Water Vertical Chemistry Distribution and Origin Analysis in Sino-Singapore Tianjin Eco-City

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