Subsidence Evolution of the Leizhou Peninsula, China, Based on InSAR Observation from 1992 to 2010
Over the past two decades, the Leizhou Peninsula has suffered from many geological hazards and great property losses caused by land subsidence. However, the absence of a deformation map of the whole peninsula has impeded the government in making the necessary decisions concerning hazard prevention a...
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MDPI AG
2017-04-01
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| Series: | Applied Sciences |
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| Online Access: | http://www.mdpi.com/2076-3417/7/5/466 |
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| author | Yanan Du Guangcai Feng Xing Peng Zhiwei Li |
| author_facet | Yanan Du Guangcai Feng Xing Peng Zhiwei Li |
| author_sort | Yanan Du |
| collection | DOAJ |
| description | Over the past two decades, the Leizhou Peninsula has suffered from many geological hazards and great property losses caused by land subsidence. However, the absence of a deformation map of the whole peninsula has impeded the government in making the necessary decisions concerning hazard prevention and mitigation. This study aims to provide the evolution of land deformation (subsidence and uplift) in the whole peninsula from 1992 to 2010. A modified stacking procedure is proposed to map the surface deformation with JERS, ENVISAT, and ALOS1 images. The map shows that the land subsidence mainly occurs along the coastline with a maximum velocity of 32 mm/year and in a wide range of inland arable lands with a velocity between 10 and 19 mm/year. Our study suggests that there is a direct correlation between the subsidence and the surface geology. Besides, the observed subsidence in urban areas, caused by groundwater overexploitation for domestic and industrial use, is moving from urban areas to suburban areas. In nonurban areas, groundwater extraction for aquaculture and arable land irrigation are the main reason for land subsidence, which accelerates saltwater intrusion and coastline erosion if regular surface deformation measurements and appropriate management measures are not taken. |
| first_indexed | 2024-04-14T06:14:33Z |
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| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-14T06:14:33Z |
| publishDate | 2017-04-01 |
| publisher | MDPI AG |
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| spelling | doaj.art-f2f0869c13cd474bb3de04272c07e3072022-12-22T02:08:16ZengMDPI AGApplied Sciences2076-34172017-04-017546610.3390/app7050466app7050466Subsidence Evolution of the Leizhou Peninsula, China, Based on InSAR Observation from 1992 to 2010Yanan Du0Guangcai Feng1Xing Peng2Zhiwei Li3School of Geosciences and Info-Physics, Central South University, Changsha 410083, ChinaSchool of Geosciences and Info-Physics, Central South University, Changsha 410083, ChinaSchool of Geosciences and Info-Physics, Central South University, Changsha 410083, ChinaSchool of Geosciences and Info-Physics, Central South University, Changsha 410083, ChinaOver the past two decades, the Leizhou Peninsula has suffered from many geological hazards and great property losses caused by land subsidence. However, the absence of a deformation map of the whole peninsula has impeded the government in making the necessary decisions concerning hazard prevention and mitigation. This study aims to provide the evolution of land deformation (subsidence and uplift) in the whole peninsula from 1992 to 2010. A modified stacking procedure is proposed to map the surface deformation with JERS, ENVISAT, and ALOS1 images. The map shows that the land subsidence mainly occurs along the coastline with a maximum velocity of 32 mm/year and in a wide range of inland arable lands with a velocity between 10 and 19 mm/year. Our study suggests that there is a direct correlation between the subsidence and the surface geology. Besides, the observed subsidence in urban areas, caused by groundwater overexploitation for domestic and industrial use, is moving from urban areas to suburban areas. In nonurban areas, groundwater extraction for aquaculture and arable land irrigation are the main reason for land subsidence, which accelerates saltwater intrusion and coastline erosion if regular surface deformation measurements and appropriate management measures are not taken.http://www.mdpi.com/2076-3417/7/5/466The Leizhou Peninsulaland subsidencestacking Interferometric SARgroundwater pumping |
| spellingShingle | Yanan Du Guangcai Feng Xing Peng Zhiwei Li Subsidence Evolution of the Leizhou Peninsula, China, Based on InSAR Observation from 1992 to 2010 Applied Sciences The Leizhou Peninsula land subsidence stacking Interferometric SAR groundwater pumping |
| title | Subsidence Evolution of the Leizhou Peninsula, China, Based on InSAR Observation from 1992 to 2010 |
| title_full | Subsidence Evolution of the Leizhou Peninsula, China, Based on InSAR Observation from 1992 to 2010 |
| title_fullStr | Subsidence Evolution of the Leizhou Peninsula, China, Based on InSAR Observation from 1992 to 2010 |
| title_full_unstemmed | Subsidence Evolution of the Leizhou Peninsula, China, Based on InSAR Observation from 1992 to 2010 |
| title_short | Subsidence Evolution of the Leizhou Peninsula, China, Based on InSAR Observation from 1992 to 2010 |
| title_sort | subsidence evolution of the leizhou peninsula china based on insar observation from 1992 to 2010 |
| topic | The Leizhou Peninsula land subsidence stacking Interferometric SAR groundwater pumping |
| url | http://www.mdpi.com/2076-3417/7/5/466 |
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