| 吐鲁番市高昌区南部绿洲区低水位期地下水化学变化规律及来源解析 |
| 摘要点击 1026 全文点击 155 投稿时间：2024-01-12 修订日期：2024-04-05 |
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| 中文关键词 地下水 来源解析 水化学特征 绝对主成分-多元线性回归（APCS-MLR）模型 氢氧同位素 高昌区 |
| 英文关键词 groundwater source analysis hydrochemical characteristics absolute principal component-multiple linear regression （APCS-MLR） model hydrogen and oxygen isotopes Gaochang District |
| 作者 | 单位 | E-mail | | 任乐 | 新疆农业大学水利与土木工程学院, 乌鲁木齐 830052
新疆水文水资源工程技术研究中心, 乌鲁木齐 830052
新疆水利工程安全与水灾害防治重点实验室, 乌鲁木齐 830052 | 916125884@qq.com | | 丁启振 | 新疆农业大学水利与土木工程学院, 乌鲁木齐 830052
新疆水文水资源工程技术研究中心, 乌鲁木齐 830052
新疆水利工程安全与水灾害防治重点实验室, 乌鲁木齐 830052 | | | 周殷竹 | 中国地质调查局水文地质环境地质调查中心, 天津 300304 | | | 周金龙 | 新疆农业大学水利与土木工程学院, 乌鲁木齐 830052
新疆水文水资源工程技术研究中心, 乌鲁木齐 830052
新疆水利工程安全与水灾害防治重点实验室, 乌鲁木齐 830052 | zjzhoujl@163.com |
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| 中文摘要 |
| 为探明地下水超采治理前后吐鲁番市高昌区南部绿洲区低水位期地下水水化学变化规律及来源影响,基于2016年12组水样（潜水3组、承压水9组）和2023年18组水样（潜水5组、承压水13组）,综合运用数理统计法、水化学图解法、氢氧同位素手段和APCS-MLR（绝对主成分-多元线性回归）模型,分析地下水水化学变化规律和来源. 结果表明,受地下水动力条件影响,研究期内潜水优势阳离子由Na+变化为Ca2+,阴离子由HCO3-变化为SO42-；承压水优势阳离子由Ca2+变化为Na+,优势阴离子为SO42-不变. 潜水和承压水的主要补给源均为大气降水,同时受到蒸发作用影响,潜水蒸发作用影响大于承压水. 地下水化学组分主要受岩石风化作用和阳离子交换作用控制；Na+、Ca2+和Mg2+主要来源于蒸发盐岩和硅酸盐岩的溶解；NO3-主要来源于农用化肥、人畜粪便和生活污水. 溶滤-富集作用（F1）、农业活动-原生地质作用（F2）和工业活动作用（F3）是影响研究区地下水化学的主要因素,贡献率分别为58.41%、18.12%和9.12%. |
| 英文摘要 |
| To explore the changes in groundwater hydrochemistry and its source influence in the low water level period of the southern oasis area of Gaochang District, Turpan City before and after the management of groundwater overexploitation, based on 12 groups of water samples in 2016 （three groups of unconfined water, nine groups of confined water） and 18 groups of water samples in 2023 （five groups of unconfined water, thirteen groups of confined water）, mathematical statistics, hydrochemical diagraph, hydrogen and oxygen isotope means, and an absolute principle component-multiple linear regression （APCS-MLR） model were used to analyze the changes and sources of groundwater hydrochemistry. The results showed that due to the dynamic conditions of groundwater, the dominant cation changed from Na+ to Ca2+, and the anion changed from HCO3- to SO42-. The dominant cation of confined water changed from Ca2+ to Na+, and the dominant anion remained unchanged as SO42-. The main supply source of both unconfined water and confined water was atmospheric precipitation, which was affected by evaporation, and the effect of evaporation of unconfined water was greater than that of confined water. The chemical composition of groundwater was mainly controlled by rock weathering and cation exchange. Na+, Ca2+, and Mg2+ were mainly derived from the dissolution of evaporative salt rock and silicate salt rock. NO3- was mainly derived from agricultural fertilizers, human and animal manure, and domestic sewage. Leaching and enrichment （F1）, agricultural activity and primary geological activity （F2）, and industrial activity （F3） were the main factors affecting groundwater chemistry in the study area, and the contribution rates were 58.41%, 18.12%, and 9.12%, respectively. |
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