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Attenuation of the contribution of groundwater to a wetland caused by groundwater overexploitation
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  • Tianyu Zhou,
  • Longcang Shu,
  • Chengpeng Lu,
  • Bo Liu
Tianyu Zhou
Hohai University College of Hydrology and Water Resources
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Longcang Shu
Hohai University College of Hydrology and Water Resources

Corresponding Author:[email protected]

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Chengpeng Lu
Hohai University College of Hydrology and Water Resources
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Bo Liu
Hohai University College of Hydrology and Water Resources
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Abstract

The continuous exploitation of groundwater has made wetland degradation an ecological and geological environmental problem that cannot be ignored and which has had impacts on the ecological environment and human production and life. In this study, with the help of Visual MODFLOW software, we used numerical simulation technology to simulate the wetland–aquifer interaction during the multiyear pumping process, establish a quasi-ideal model of wetlands based on the actual area of the Baiyangdian Basin, simulate the relationship of water quantity change between wetlands and piedmont plain aquifers during groundwater exploitation and its natural recovery process, and quantify the attenuation of the contribution of groundwater to wetlands caused by groundwater overexploitation. The results show that the impact of groundwater overexploitation on wetland degradation is mainly divided into two parts: one is the reduced base flow from the piedmont plain to the wetland, and the other is the induced infiltration caused by the reverse recharge of groundwater from the wetland due to the pumping effect. At the beginning of pumping, the effect of reduced base flow on wetland degradation is dominant, but with a longer pumping time, the effect of induced infiltration on wetland degradation exceeds the effect of reduced base flow. After stopping pumping, the effect of induced infiltration on wetland degradation responds instantly and decreases rapidly, while the effect of reduced base flow on wetland degradation continues for a long time. The total water reduction of wetlands increases with increasing hydraulic conductivity, and in actual wetland areas, if groundwater overexploitation is not restricted or artificial supply measures are not taken, the amount of wetland water will gradually decrease until it is exhausted.
30 Mar 2023Submitted to Hydrological Processes
30 Mar 2023Submission Checks Completed
30 Mar 2023Assigned to Editor
05 Apr 2023Reviewer(s) Assigned
07 Apr 2023Reviewer(s) Assigned
04 May 2023Review(s) Completed, Editorial Evaluation Pending
10 May 2023Editorial Decision: Revise Major
18 Jun 20231st Revision Received
18 Jun 2023Submission Checks Completed
18 Jun 2023Assigned to Editor
18 Jun 2023Reviewer(s) Assigned
19 Jun 2023Reviewer(s) Assigned
13 Jul 2023Review(s) Completed, Editorial Evaluation Pending
14 Jul 2023Editorial Decision: Revise Minor
20 Jul 20232nd Revision Received
24 Jul 2023Submission Checks Completed
24 Jul 2023Reviewer(s) Assigned
24 Jul 2023Assigned to Editor
24 Jul 2023Review(s) Completed, Editorial Evaluation Pending
11 Aug 2023Editorial Decision: Revise Minor
27 Aug 20233rd Revision Received
27 Aug 2023Assigned to Editor
27 Aug 2023Submission Checks Completed
27 Aug 2023Reviewer(s) Assigned
27 Aug 2023Review(s) Completed, Editorial Evaluation Pending
04 Sep 2023Editorial Decision: Revise Minor
16 Oct 20234th Revision Received
16 Oct 2023Submission Checks Completed
16 Oct 2023Assigned to Editor
16 Oct 2023Reviewer(s) Assigned
16 Oct 2023Review(s) Completed, Editorial Evaluation Pending
18 Oct 2023Editorial Decision: Accept