Research on water source protection based on Visual MODFLOW groundwater numerical simulation

CAO Zhendong<sup>1; 3</sup>; TAN Tingjing<sup>1; 3</sup>; YANG Mingxing<sup>2</sup>; SONG Xiaoqing<sup>1; 3</sup>; PU Xiuchao<sup>1; 3</sup>

doi:10.19388/j.zgdzdc.2023.05.11

2023 Vol. 10, No. 5

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Article navigation > Geological Survey of China > 2023 > 10(5): 91-98

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CAO Zhendong1, 3, TAN Tingjing1, 3, YANG Mingxing2, SONG Xiaoqing1, 3, PU Xiuchao1, 3. 2023. Research on water source protection based on Visual MODFLOW groundwater numerical simulation. Geological Survey of China, 10(5): 91-98. doi: 10.19388/j.zgdzdc.2023.05.11

Citation:

CAO Zhendong^{1, 3}, TAN Tingjing^{1, 3}, YANG Mingxing², SONG Xiaoqing^{1, 3}, PU Xiuchao^{1, 3}. 2023. Research on water source protection based on Visual MODFLOW groundwater numerical simulation. Geological Survey of China, 10(5): 91-98. doi: 10.19388/j.zgdzdc.2023.05.11

Research on water source protection based on Visual MODFLOW groundwater numerical simulation

1. No. 111 Geological Party, Guizhou Bureau of Geology and Mineral Exploration & Development, Guizhou Guiyang 550081, China;
2. School of Resource and Environment Engineering, Guizhou Institute of Technology, Guizhou Guiyang 550003, China;
3. Guizhou Geological Engineering Survey, Design and Research Institute Co., Ltd., Guizhou Guiyang 550081, China

Received Date: 12 June 2023

Revised Date: 02 September 2023

Abstract

Abstract

Clarifying the migration conditions of groundwater is the key basis for the protection of urban groundwater sources. In order to serve the sustainable development of the groundwater source in Shenyang, the authors constructed the hydrogeological conceptual model and groundwater numerical model according to the hydrogeological conditions of the study area. The Visual MODFLOW software was used to solve the model, and the model parameters were identified and verified based on the water level data of observation well. The range of groundwater funnel and the depth of water level drop after water source operation were analyzed according to the corrected numerical model, and the water level recovery after the stop-mining of water source was simulated and predicted. The results showed that the total recharge of groundwater aquifer in the study area was 62 230 m³/d, and the total discharge was 63 400 m³/d, with equilibrium difference of -1 170 m³/d. And groundwater dynamic was in a negative equilibrium state for many years. Through the prediction of the confined aquifer situation after 2 a, 5 a and 10 a of water source exploitation, the water level decreased by an average of 6 m, 8 m and 9 m respectively, and the area of the central funnel area was 54.56 km², 65.04 km² and 65.80 km² respectively. The funnel expanded rapidly in the early stage of mining, and then the speed gradually slowed down. The exploitation of confined aquifer in the water source had a certain impact on the surrounding flow field, but this impact was mainly obvious during the mining period, and the funnel area gradually recovered after one year of stop-pumping. It is suggested that the exploitation amount should be strictly controlled and the monitoring and management of groundwater should be strengthened for the sustainable utilization and protection of water source. The prediction results could provide some technical support for water source protection.
- groundwater /
- water source protection /
- numerical simulation /
- Visual MODFLOW

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References

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