ORIGINAL RESEARCH
Integrated Hydrogeochemical Assessment of Groundwater Resources for Sustainable Management in the Southwest Dongping Lake Region
Feng Zhang 1,2,3
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Hua Xiao 1,2
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1
Shandong Provincial Lunan Geology and Exploration Institute (Shandong Provincial Bureau of Geology and Mineral Resources No. 2 Geological Brigade), Jining 272100, China
 
2
Shandong Engineering Research Center of Geothermal Energy Exploration and Development, Jining 272100, China
 
3
Shandong Provincial Key Laboratory of Geothermal Clean Energy, Jining 272000, China
 
4
Petro China Zhejiang Oil field Company Limited, Hangzhou 310023, China
 
5
Liangshan County Natural Resources and Planning Bureau, Jining 272600, China
 
 
Submission date: 2025-07-11
 
 
Final revision date: 2025-10-29
 
 
Acceptance date: 2025-11-24
 
 
Online publication date: 2026-03-04
 
 
Corresponding author
Huiming Zheng   

Shandong Provincial Lunan Geology and Exploration Institute (Shandong Provincial Bureau of Geology and Mineral Resources No. 2 Geological Brigade), Jining 272100, China
 
 
 
KEYWORDS
TOPICS
ABSTRACT
In order to characterize the groundwater characteristics in the southwestern region of Dongping Lake, statistics, Piper plot, Gibbs plot, and ion comparison were used to analyze 48 samples, evaluate the drinkability and irrigation suitability of groundwater in the SDLR area, and assess the human health risks associated with nitrate and fluoride pollution. The groundwater in the SDLR area is weakly alkaline, hard freshwater. Karst water shows the SO4·Cl-Ca·Mg type, while pore water is mainly composed of HCO3-Ca·Mg and SO4·Cl-Ca·Mg. Rock weathering is mainly caused by carbonate dissolution, with a small amount of silicate and gypsum input being the main factors dominating the hydrochemical characteristics; cation exchange is also an important hydrochemical mechanism. All samples of NO₃⁻ meet the Class III limit (≤88.6mg/L), mainly from feces and sewage. The evaluation of irrigation water quality shows that salinization is more harmful than alkalinity, and most water samples are suitable for irrigation. Poor quality water is limited to the north. The human health risk model shows that 60% of the samples pose a non-carcinogenic threat, with children being more affected than adults; oral intake is the main route. High-risk areas are concentrated in the north and southwest. The research results provide a scientific basis for sustainable groundwater management in SDLR.
CONFLICT OF INTEREST
The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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