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- Title
Continuing Severe Water Shortage in the Water‐Receiving Area of the South‐To‐North Water Diversion Eastern Route Project From 2002 to 2020.
- Authors
Xu, Yuyue; Gun, Zhao; Zhao, Jianwei; Chen, Jianli; Liu, Qing; Cheng, Xing; Sutanudjaja, Edwin H.; Wang, Jida; Liu, Hehua; Zhan, Wenfeng
- Abstract
The water‐receiving area of the South‐to‐North Water Diversion Eastern Route Project (SNWDP‐ER) is one of the most severely affected water‐shortage areas in China, and no previous study has been conducted on the changes in water storage in this area. In this study, we combined the latest Gravity Recovery and Climate Experiment (GRACE) And GRACE Follow‐On products with global models for the first time to analyze changes in water storages in this area from 2002 to 2020, and to investigate the effects of climate change and human activity on changes in water storage. We found that SNWDP‐ER aided the recovery of surface water (nongroundwater) with a recovery rate of 9.44 ± 1.65 mm/yr after its implementation, but had little effect on the recovery of groundwater and terrestrial water storage in the water‐receiving area. Before the SNWDP‐ER was implemented, the rates of decrease of groundwater and terrestrial water storage were only −1.59 ± 0.58 and −5.18 ± 0.75 mm/yr, respectively. After implementation, the rates of decrease of groundwater and terrestrial water storage were −17.7 ± 1.27 and −8.16 ± 1.18 mm/yr, respectively. Groundwater decline, accelerated by human activity and climate change, has led to an accelerated decline in terrestrial water storage. Effects of SNWDP‐ER and stringent policies reducing groundwater use, along with largely increased precipitation in North China on groundwater storage after year 2020 need to be examined in the future. Our results have important implications for the management and evaluation of SNWDP‐ER. Plain Language Summary: The aim of this study was to uncover changes in water storage within the water‐receiving area of the South‐to‐North Water Diversion Eastern Route Project (SNWDP‐ER) before and after its implementation. This is significant due to the water scarcity in the SNWDP‐ER's water‐receiving area in China. The study found that SNWDP‐ER positively impacts the recovery of surface water after implementation. However, its influence on groundwater and terrestrial water storage recovery is limited. Prior to SNWDP‐ER implementation, the decline rate of groundwater and terrestrial water storage was comparatively lower than after implementation, influenced by climate variability and human activity. These findings hold implications for the management and assessment of SNWDP‐ER. Key Points: South‐to‐North Water Diversion Eastern Route Project (SNWDP‐ER) aids in the recovery of nongroundwater (9.44 ± 1.65 mm/yr) in the water‐receiving areaSNWDP‐ER had little effect on the recovery of groundwater (−17.7 ± 1.27 mm/yr) and terrestrial water storage (TWS; −8.16 ± 1.18 mm/yr)Groundwater decline, accelerated by human activity and climate variability, accelerated the decrease (−17.7 ± 1.27 mm/yr) in TWS
- Subjects
CHINA; WATER diversion; WATER shortages; WATER storage; GROUNDWATER; CLIMATE change
- Publication
Water Resources Research, 2023, Vol 59, Issue 10, p1
- ISSN
0043-1397
- Publication type
Article
- DOI
10.1029/2022WR034365