Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSAR
Groundwater variation can cause land-surface movement, which in turn can cause significant and recurrent harm to infrastructure and the water storage capacity of aquifers. The capital cities in the England (London) and India (Delhi) are witnessing an ever-increasing population that has resulted in e...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-11-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/13/23/4741 |
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| author | Vivek Agarwal Amit Kumar David Gee Stephen Grebby Rachel L. Gomes Stuart Marsh |
| author_facet | Vivek Agarwal Amit Kumar David Gee Stephen Grebby Rachel L. Gomes Stuart Marsh |
| author_sort | Vivek Agarwal |
| collection | DOAJ |
| description | Groundwater variation can cause land-surface movement, which in turn can cause significant and recurrent harm to infrastructure and the water storage capacity of aquifers. The capital cities in the England (London) and India (Delhi) are witnessing an ever-increasing population that has resulted in excess pressure on groundwater resources. Thus, monitoring groundwater-induced land movement in both these cities is very important in terms of understanding the risk posed to assets. Here, Sentinel-1 C-band radar images and the persistent scatterer interferometric synthetic aperture radar (PSInSAR) methodology are used to study land movement for London and National Capital Territory (NCT)-Delhi from October 2016 to December 2020. The land movement velocities were found to vary between −24 and +24 mm/year for London and between −18 and +30 mm/year for NCT-Delhi. This land movement was compared with observed groundwater levels, and spatio-temporal variation of groundwater and land movement was studied in conjunction. It was broadly observed that the extraction of a large quantity of groundwater leads to land subsidence, whereas groundwater recharge leads to uplift. A mathematical model was used to quantify land subsidence/uplift which occurred due to groundwater depletion/rebound. This is the first study that compares C-band PSInSAR-derived land subsidence response to observed groundwater change for London and NCT-Delhi during this time-period. The results of this study could be helpful to examine the potential implications of ground-level movement on the resource management, safety, and economics of both these cities. |
| first_indexed | 2024-03-10T04:46:21Z |
| format | Article |
| id | doaj.art-54b54d83771840a38485f92fb796f506 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-10T04:46:21Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-54b54d83771840a38485f92fb796f5062023-11-23T02:55:39ZengMDPI AGRemote Sensing2072-42922021-11-011323474110.3390/rs13234741Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSARVivek Agarwal0Amit Kumar1David Gee2Stephen Grebby3Rachel L. Gomes4Stuart Marsh5Faculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UKSchool of Geography, University of Nottingham, Nottingham NG7 2RD, UKTerra Motion Limited, Ingenuity Centre, Nottingham NG7 2TU, UKFaculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UKFaculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UKFaculty of Engineering, University of Nottingham, Nottingham NG7 2RD, UKGroundwater variation can cause land-surface movement, which in turn can cause significant and recurrent harm to infrastructure and the water storage capacity of aquifers. The capital cities in the England (London) and India (Delhi) are witnessing an ever-increasing population that has resulted in excess pressure on groundwater resources. Thus, monitoring groundwater-induced land movement in both these cities is very important in terms of understanding the risk posed to assets. Here, Sentinel-1 C-band radar images and the persistent scatterer interferometric synthetic aperture radar (PSInSAR) methodology are used to study land movement for London and National Capital Territory (NCT)-Delhi from October 2016 to December 2020. The land movement velocities were found to vary between −24 and +24 mm/year for London and between −18 and +30 mm/year for NCT-Delhi. This land movement was compared with observed groundwater levels, and spatio-temporal variation of groundwater and land movement was studied in conjunction. It was broadly observed that the extraction of a large quantity of groundwater leads to land subsidence, whereas groundwater recharge leads to uplift. A mathematical model was used to quantify land subsidence/uplift which occurred due to groundwater depletion/rebound. This is the first study that compares C-band PSInSAR-derived land subsidence response to observed groundwater change for London and NCT-Delhi during this time-period. The results of this study could be helpful to examine the potential implications of ground-level movement on the resource management, safety, and economics of both these cities.https://www.mdpi.com/2072-4292/13/23/4741PS-InSARSentinel-1surface subsidencegroundwaterLondonNCT-Delhi |
| spellingShingle | Vivek Agarwal Amit Kumar David Gee Stephen Grebby Rachel L. Gomes Stuart Marsh Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSAR Remote Sensing PS-InSAR Sentinel-1 surface subsidence groundwater London NCT-Delhi |
| title | Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSAR |
| title_full | Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSAR |
| title_fullStr | Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSAR |
| title_full_unstemmed | Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSAR |
| title_short | Comparative Study of Groundwater-Induced Subsidence for London and Delhi Using PSInSAR |
| title_sort | comparative study of groundwater induced subsidence for london and delhi using psinsar |
| topic | PS-InSAR Sentinel-1 surface subsidence groundwater London NCT-Delhi |
| url | https://www.mdpi.com/2072-4292/13/23/4741 |
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