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eISSN: 2083-5906
ISSN: 1230-1485
ISSN: 1230-1485
ORIGINAL RESEARCH
Analysis of Groundwater Dynamic Change
and Influencing Factors in Rizhao
Coastal Plain Area
1
No. 8 Institute of Geology and Mineral Resources Exploration of Shandong Province, Rizhao, Shandong, 276826, China
2
Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences,
Beijing, 100010, China
3
Key Laboratory of Nonferrous Metal Ore Exploration and Resource Evaluation of Shandong Provincial Bureau
of Geology and Mineral Resources, Rizhao, Shandong, 276826, China
4
Rizhao Big Data Research Institute of Geology and Geographic Information, Rizhao, Shandong, 276826, China
5
Rizhao Key Laboratory of Land Quality Evaluation and Pollution Remediation, Rizhao, Shandong, 276826, China
Submission date: 2025-06-24
Final revision date: 2025-07-25
Acceptance date: 2025-08-10
Online publication date: 2025-12-01
Corresponding author
Wei Tongzheng
No. 8 Institute of Geology and Mineral Resources Exploration of Shandong Province, Rizhao, Shandong, 276826, China
No. 8 Institute of Geology and Mineral Resources Exploration of Shandong Province, Rizhao, Shandong, 276826, China
KEYWORDS
TOPICS
ABSTRACT
Groundwater dynamics in the Rizhao Coastal Plain, primarily Quaternary porous phreatic aquifers,
exhibit complex spatiotemporal variability driven by natural and anthropogenic factors. Using 2018-2020
monitoring data from 20 wells, the dynamic variation of groundwater in the Rizhao Coastal Plain
was studied by applying empirical orthogonal function (EOF) decomposition, spatial analysis,
and correlation analysis. EOF decomposition revealed distinct seasonal patterns: groundwater level
fluctuations demonstrated lower interquartile ranges in summer-autumn than in winter-spring
(p<0.05). Spatial analysis identified four principal components explaining 83.2% of the total variance
(PC1 = 36.7%, P C2 = 2 4.2%, P C3 = 13.4%, P C4 = 8 .9%). P recipitation a ccounted for 45.6% of l evel
variations, with anthropogenic activities (e.g., groundwater extraction) contributing 54.4%. By 2020,
intensive extraction displaced the piezometric centroid southwestward, forming a new depression
cone. To maintain aquifer equilibrium and prevent seawater intrusion, integrated management
strategies are imperative: 1) Optimizing socio-economic spatial planning to reduce extraction pressure;
2) Implementing dynamic water allocation systems; 3) Establishing cross-sectoral governance
frameworks for coordinated aquifer protection. This study provides a scientific basis for sustainable
groundwater utilization in coastal plains undergoing rapid development.
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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| eISSN: | 2083-5906 |
| ISSN: | 1230-1485 |
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