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The fluctuation of groundwater level under the background of Sponge City Construction in the pilot area in Tianjin, China

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Abstract

Urbanization has brought adverse effects on the groundwater. Increased consumption of groundwater and decreased groundwater recharge has led to groundwater decline. As a new urban management strategy, sponge city construction is an effective way to increase the permeable areas, promote the utilization of rainwater resources, and recharge groundwater in the urban area. Low impact development (LID) is the primary facility employed by sponge city construction. In this study, the feasibility of sponge city construction was quantitatively evaluated based on the long-term groundwater data. Three monitoring wells were drilled and installed within the aquifer to observe the fluctuations in water levels from September 2018 to January 2020 in the pilot area. Several LID measures were applied in Xinhua Middle School and Gediao block, where the monitoring wells were also located. According to a statistical analysis of the 50 real-time measurements, the groundwater level dropped by 0.89 m, 3.87 m, and 1.08 m at # well Xinhua, # well Tianfang, and # well Gediao, respectively, over the past 17 months. The simple linear regression was used to make trend estimation and correlation analysis. The results indicated that groundwater levels of three monitoring wells all declined during the dry season. However, all the water levels responded to the continual precipitation and showed obvious increases during the wet season. The groundwater level increased by 0.62 m, 0.74 m, and 0.90 m at # well Xinhua, # well Tianfang, and # well Gediao, respectively, during the wet season. The LID could reduce the impervious surface and increase the low soil permeability by amending soil texture in situ. The correlation analysis further verified that the rainfall affected the local groundwater recharge. So more rainwater should be intercepted at the source and then added to the aquifer through infiltration. The sponge city construction-low impact development is expected to maximize the use of the limited rainwater resources, improve the urban ecological environment, and mitigate the adverse impacts of urban sprawl.

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Funding

This work was supported by the China National Critical Project for Science and Technology on Water Pollution Prevention and Control (No. 2017ZX07106001).

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Correspondence to Tiantian Zhu.

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The authors declare no competing interests.

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Responsible Editor: Amjad Kallel

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Zhu, T., Liu, F., Li, Y. et al. The fluctuation of groundwater level under the background of Sponge City Construction in the pilot area in Tianjin, China. Arab J Geosci 15, 1602 (2022). https://doi.org/10.1007/s12517-022-10892-y

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  • DOI: https://doi.org/10.1007/s12517-022-10892-y

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