GROUNDWATER POLLUTION DYNAMIC RISK ASSESSMENT BASED ON NUMERICAL SIMULATION AND RISK SCREENING

YIN Leyi; HUANG Guoxin; NIU Haobo; CHEN Jian; XIE Yueqing; YANG Lihu; LIU Ling

doi:10.13205/j.hjgc.202401026

Volume 42 Issue 1

Jan. 2024

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2024 > 42(1): 199-205

YIN Leyi, HUANG Guoxin, NIU Haobo, CHEN Jian, XIE Yueqing, YANG Lihu, LIU Ling. GROUNDWATER POLLUTION DYNAMIC RISK ASSESSMENT BASED ON NUMERICAL SIMULATION AND RISK SCREENING[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 199-205. doi: 10.13205/j.hjgc.202401026

Citation:

YIN Leyi, HUANG Guoxin, NIU Haobo, CHEN Jian, XIE Yueqing, YANG Lihu, LIU Ling. GROUNDWATER POLLUTION DYNAMIC RISK ASSESSMENT BASED ON NUMERICAL SIMULATION AND RISK SCREENING[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 199-205. doi: 10.13205/j.hjgc.202401026

Citation:

YIN Leyi, HUANG Guoxin, NIU Haobo, CHEN Jian, XIE Yueqing, YANG Lihu, LIU Ling. GROUNDWATER POLLUTION DYNAMIC RISK ASSESSMENT BASED ON NUMERICAL SIMULATION AND RISK SCREENING[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(1): 199-205. doi: 10.13205/j.hjgc.202401026

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GROUNDWATER POLLUTION DYNAMIC RISK ASSESSMENT BASED ON NUMERICAL SIMULATION AND RISK SCREENING

doi: 10.13205/j.hjgc.202401026

1. Center for Ecological Environment in Yangtze River Economic Belt, Chinese Academy of Environmental Planning, Beijing 100041, China;
2. School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China;
3. Key Laboratory of Water Cycle and Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100049, China

Received Date: 2023-02-16
Available Online: 2024-04-29

Abstract

Abstract

Since the traditional groundwater risk assessment of contaminated sites ignored the risk of pollution spreading risk, a groundwater contaminated site and its surroundings in Hunan were selected as the research area for groundwater pollution dynamic risk assessment and trend prediction. A combination of quantitative and qualitative methods was used to establish a dynamic assessment method based on numerical simulation and risk screening through index screening and determination. The simulation prediction shows that the pollutants in the soil and groundwater of the site gradually diffuse downstream over time. The concentration of Cr(Ⅵ) in groundwater reaches a maximum of 1239.5 mg/L on the 38th day. Pollutants migrate to the river on the 585 day, and the groundwater pollution plume reaches its maximum on the 917th day. The total groundwater pollution risk scores of the site calculated by the two methods are 76.2 and 72.4, both belong to high risks, indicating that qualitative analysis of migration in the vadose zone and the water-saturated zone may tend to be conservative compared to quantitative analysis. The dynamic risk assessment results show that the site is always at high-risk throughout its lifetime, and the groundwater pollution risk first rises and then declines, reaching the highest risk of 95.2 points from the 500th day to the 700th day. It is suggested that groundwater risk control or restoration should be carried out to avoid greater risk.
- groundwater pollution,
- contaminated site,
- numerical simulation,
- risk screening,
- dynamic risk assessment

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References(21)

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