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Updated: Jun 18, 2025
Watershed Planning within a Quantitative Scenario Analysis Framework
Published on: July 24, 2016
Evaluation of groundwater quality with multi-source pollution based on source identification and health risks
Dong Yu1, Jiayi Deng1, Qing Jiang1
1State Key Laboratory of Geohazard Prevention and Geoenvironment Protection (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China; State Environmental Protection Key Laboratory of Synergetic Control and Joint Remediation for Soil&Water Pollution (Chengdu University of Technology), 1#, Dongsanlu, Erxianqiao, Chengdu 610059, Sichuan, PR China.
Groundwater pollution in Chengdu is mainly from domestic waste and geological factors, posing significant health risks, especially from arsenic. Urgent monitoring and management are needed for sustainable water use.
Area of Science:
- Environmental Science
- Hydrogeology
- Public Health
Background:
- Chengdu City faces water scarcity, making groundwater a critical resource.
- Inorganic pollutants in groundwater pose significant health risks.
- Understanding pollutant sources is vital for water resource management.
Purpose of the Study:
- To characterize groundwater hydrochemistry in Chengdu.
- To identify sources of inorganic pollutants.
- To quantify health risks associated with groundwater contamination.
Main Methods:
- Analysis of 156 groundwater samples collected in 2021.
- Application of the Positive Matrix Factorization (PMF) model for source apportionment.
- Integration of Monte Carlo Simulation (MCS) and Health Risk Evaluation Model (HREM) for risk assessment.
Main Results:
- Groundwater types are predominantly Ca·Na-SO4·HCO3, Ca·Na-HCO3·SO4, and Ca-HCO3·SO4.
- Key pollution sources include domestic pollution (25.6%), dissolution-filtration-evaporation-concentration (22.8%), and hydrogeochemical evolution (15.8%).
- Arsenic poses a significant carcinogenic risk, exceeding acceptable levels by 23 times for adults and 109 times for children. Chloride contributes most to non-carcinogenic risks.
Conclusions:
- Domestic pollution and geological background are major contributors to health risks.
- Arsenic contamination presents a critical public health concern.
- Establishing robust groundwater monitoring and management strategies is essential for sustainable water resource utilization in Chengdu.
