| Citation: | PEI Hongjun，XIE Hao，CHENG Tianshun，et al. Simulation on fault effects on CODMn migration in groundwater at landfill site：A case study of Longhua Energy Ecological Park in Shenzhen City[J]. Bulletin of Geological Science and Technology，2025，44（5）：1-13 doi: 10.19509/j.cnki.dzkq.tb20240731
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As an important component of geological structure, faults significantly affect the diffusion range and tansport rate of pollutants within the groundwater systems by changing the groundwater flow paths, permeability distribution and solute transport mechanism. However, few studies have simulated the effect of faults on groundwater pollution migration in landfill sites, either domestically or internationally.
A groundwater flow and solute transport model incorporating fault permeability was developed using GMS software.
The model simulated the impact of characteristic landfill pollutant seepage on the groundwater environment and a water delivery tunnel under various conditions, considering enhanced fault permeability.
The simulation results show that: Under normal operating conditions, due to the anti-seepage measures at the bottom of the plant, the polluant diffusion range is largely confiend within the plant site, and the maximum pollutants concentration at the center iremains below 0.5 mg/L. Under abnormal conditions (leakage scenarios), pollutants from leakage source No. 1, No. 2 and No. 3 reached the water delivery tunnel location at 800 days,
The findings of this research provide scientific support for groundwater pollution prevention and risk assessment in the study area.
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