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This study assess the effectiveness of groundwater pressure extraction in Beijing since the opening of the first phase of the South-to-North Water Diversion Project, using survey and evaluation methods. Firstly, an analysis of water consumption structure and the usage of diverted river water in Beijing in recent years was conducted. Secondly, the volume of groundwater pressure extraction in Beijing after the project's inauguration was examined, revealing a decrease from 1.96 billion m3 in 2014 to 1.35 billion m3 in 2020. The proportion of water supply reduced from 52.3% in 2014 to 33.3% in 2020, leading to an optimized water supply structure. By the end of 2020, groundwater pressure extraction in Beijing is estimated at 446 million m3, with a substantial reduction in over-exploitation of groundwater. Groundwater resources have been effectively replenished, and the strategic reserve capacity has been enhanced. Furthermore, this study evaluates the change in groundwater levels as an indicator of the effectiveness of pressure extraction. The declining trend of groundwater levels in Beijing has been effectively mitigated, and there has been a consistent rebound in groundwater levels over the past five years.


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Effectiveness of groundwater extraction in Beijing since the ingauration of the first phase of the South-to-North Water Diversion Project, China

Show Author's information Yuan-yuan Gao1Qing-yu Sun1Ai-xin Wen2Yan-pei Cheng2( )
Bureau of South to North Water Transfer of Planning, Designing and Management, Ministry of Water Resources, Beijing 100038, China
Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang 050061, China

Abstract

This study assess the effectiveness of groundwater pressure extraction in Beijing since the opening of the first phase of the South-to-North Water Diversion Project, using survey and evaluation methods. Firstly, an analysis of water consumption structure and the usage of diverted river water in Beijing in recent years was conducted. Secondly, the volume of groundwater pressure extraction in Beijing after the project's inauguration was examined, revealing a decrease from 1.96 billion m3 in 2014 to 1.35 billion m3 in 2020. The proportion of water supply reduced from 52.3% in 2014 to 33.3% in 2020, leading to an optimized water supply structure. By the end of 2020, groundwater pressure extraction in Beijing is estimated at 446 million m3, with a substantial reduction in over-exploitation of groundwater. Groundwater resources have been effectively replenished, and the strategic reserve capacity has been enhanced. Furthermore, this study evaluates the change in groundwater levels as an indicator of the effectiveness of pressure extraction. The declining trend of groundwater levels in Beijing has been effectively mitigated, and there has been a consistent rebound in groundwater levels over the past five years.

Keywords: Groundwater Over-exploitation, South-to-North Water Diversion, Beijing City, Groundwater Pressure Extraction

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DOI

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Publication history

Received: 25 October 2022
Accepted: 27 June 2023
Published: 15 September 2023
Issue date: September 2023

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2305-7068/© 2023 Journal of Groundwater Science and Engineering Editorial Office

Acknowledgements

Acknowledgements

This study was funded by the projects ''Impacts of water transfer from the western route of the South-to-North Water Diversion Project on the ecological environment of the Yangtze and Yellow Rivers and coping strategies'' (No. 2022YFC3202400) and ''Ecological Compensation Mechanism and Biological Invasion Risk Analysis of Water Transfer from the Western Route Project'' (No. 2022YFC3202404).

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This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0)

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