A national-scale assessment of land subsidence in China’s major cities.
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| Title: | A national-scale assessment of land subsidence in China’s major cities. |
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| Authors: | Zurui Ao, Xiaomei Hu, Shengli Tao, Xie Hu, Guoquan Wang, Mingjia Li, Fang Wang, Litang Hu, Xiuyu Liang, Jingfeng Xiao, Yusup, Asadilla, Wenhua Qi, Qinwei Ran, Jiayi Fang, Jinfeng Chang, Zhenzhong Zeng, Yongshuo Fu, Xue, Baolin, Ping Wang, Kefei Zhao |
| Source: | Science (pre-March 2025). 4/19/2024, Vol. 384 Issue 6693, p301-306. 6p. 4 Diagrams. |
| Subjects: | Land subsidence, Metropolis, Synthetic aperture radar, Radar interferometry, Absolute sea level change, Coastal wetlands |
| Geographic Terms: | China |
| Abstract: | China’s massive wave of urbanization may be threatened by land subsidence. Using a spaceborne synthetic aperture radar interferometry technique, we provided a systematic assessment of land subsidence in all of China’s major cities from 2015 to 2022. Of the examined urban lands, 45% are subsiding faster than 3 millimeters per year, and 16% are subsiding faster than 10 millimeters per year, affecting 29 and 7% of the urban population, respectively. The subsidence appears to be associated with a range of factors such as groundwater withdrawal and the weight of buildings. By 2120, 22 to 26% of China’s coastal lands will have a relative elevation lower than sea level, hosting 9 to 11% of the coastal population, because of the combined effect of city subsidence and sea-level rise. Our results underscore the necessity of enhancing protective measures to mitigate potential damages from subsidence. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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| Abstract: | China’s massive wave of urbanization may be threatened by land subsidence. Using a spaceborne synthetic aperture radar interferometry technique, we provided a systematic assessment of land subsidence in all of China’s major cities from 2015 to 2022. Of the examined urban lands, 45% are subsiding faster than 3 millimeters per year, and 16% are subsiding faster than 10 millimeters per year, affecting 29 and 7% of the urban population, respectively. The subsidence appears to be associated with a range of factors such as groundwater withdrawal and the weight of buildings. By 2120, 22 to 26% of China’s coastal lands will have a relative elevation lower than sea level, hosting 9 to 11% of the coastal population, because of the combined effect of city subsidence and sea-level rise. Our results underscore the necessity of enhancing protective measures to mitigate potential damages from subsidence. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 00368075 |
| DOI: | 10.1126/science.adl4366 |
