Journal of Jilin University(Earth Science Edition) ›› 2023, Vol. 53 ›› Issue (6): 1864-1879.doi: 10.13278/j.cnki.jjuese.20230047

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Risk Assessment and Zoning of Seawater Intrusion Hazard in Coastal Region of Laizhou City Based on AHP-EWM Method

Shu Longcang1,2，Huang Lei1,2，Chen Huawei3，Lu Chengpeng1,2，Liu Bo1,2   

  1. 1. College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China
    2. State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China
    3. Water Resources Research Institute of Shandong Province, Jinan 250000, China
  • Online:2023-11-26 Published:2023-12-13
  • Supported by:
    the National Key R&D Program of China （2021YFC3200502） and the National Natural Science Foundation of China （41971027）

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Abstract: Based on the chain transfer process of seawater intrusion hazard, this study established a risk assessment index system of coastal region in Laizhou City according to the risk of disaster causing factors, vulnerability of disaster bearing body, disaster loss and disaster prevention and mitigation capability and ascertained the weight of each index by combined method of the analytic hierarchy process (AHP) and the entropy weight method (EWM) based on the minimum information entropy, ultimately the total risk value and corresponding ranking were obtained by the comprehensive weighted evaluation method to figure the hazard degree and influencing factors of seawater intrusion in Laizhou City. The calculation result of the total risk index showed that Chenggang Road had the highest risk, with a value of 5.76, and Jincang Street had the lowest risk, with a value of 4.03. According to the total risk value, research zone was divided into the highest risk, high risk and lower risk zone. Pearson correlation test and comparison of risk value of indexes presented that groundwater exploitation intensity with correlation index of 0.917 is the control index of regional seawater intrusion risk assessment and the key factor to prevent seawater intrusion disaster.
Key words: seawater intrusion; AHP; EWM; risk evaluation; Laizhou City

Key words: seawater intrusion, AHP, EWM, risk evaluation, Laizhou City

CLC Number: 

  • P694
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