Spatial Distribution and Monitoring of Land Subsidence Using Sentinel-1 SAR Data in Java, Indonesia
Java Island, located in Indonesia, is the country’s main island, with a population of 150 million, more than half the population of the country. There are at least four big cities located on the island that have seen fast development in the last 30 years. The land subsidence (LS) issue caused by gro...
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2025-03-01
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| author | Teguh P. Sidiq Irwan Gumilar Hasanuddin Z. Abidin Irwan Meilano Ayu Purwarianti Rahayu Lestari |
| author_facet | Teguh P. Sidiq Irwan Gumilar Hasanuddin Z. Abidin Irwan Meilano Ayu Purwarianti Rahayu Lestari |
| author_sort | Teguh P. Sidiq |
| collection | DOAJ |
| description | Java Island, located in Indonesia, is the country’s main island, with a population of 150 million, more than half the population of the country. There are at least four big cities located on the island that have seen fast development in the last 30 years. The land subsidence (LS) issue caused by groundwater overexploitation, compaction, and geological setting, has been known on the island for more than 20 years. However, past studies have mostly focused on one particular important area, while the big picture of LS on the whole island is often overlooked. This study utilized Sentinel-1 Synthetic Aperture Radar (SAR) data from 2017 to 2023, analyzed using Small Baseline Subset (SBAS) interferometry, to map LS across Java Island. We used DEMNAS to eliminate the topographic signal. We found ten regions with a noticeable LS rate, affecting nearly 60 million people who reside in the LS zones, namely, Serang, Greater Jakarta, Cianjur, Bandung, Cirebon, Brebes and Tegal, Pekalongan, Greater Semarang, Surabaya, and Sidoardjo. The highest rates and the large coverage of LS were observed in Greater Jakarta (up to 150 mm/year), Bandung (200 mm/year), Semarang (160 mm/year), and Pekalongan (up to 110 mm/year). LS was also detected in smaller areas or districts, such as Serang, Cianjur, Cirebon, Brebes, Tegal, Surabaya, and Sidoarjo, with rates ranging from 60 to 140 mm/year. The two areas of Cianjur and Brebes, which have never been mentioned in previous studies, show LS rates of about 80 mm/year and 70 mm/year, respectively. The LS rate in all areas was shown to be linear over time, except in Pekalongan, which shows rate deflation after 2021. We also found that most affected regions are urban and industrial zones, indicating a strong correlation with anthropogenic activities. LS leads to widespread socioeconomic and environmental impacts, including damage to infrastructure, increased flooding, and reduced groundwater capacity. |
| format | Article |
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| institution | DOAJ |
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| language | English |
| publishDate | 2025-03-01 |
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| spelling | doaj-art-6b11f4b17da84b4e9c3abd1a4496f0a62025-08-20T03:08:44ZengMDPI AGApplied Sciences2076-34172025-03-01157373210.3390/app15073732Spatial Distribution and Monitoring of Land Subsidence Using Sentinel-1 SAR Data in Java, IndonesiaTeguh P. Sidiq0Irwan Gumilar1Hasanuddin Z. Abidin2Irwan Meilano3Ayu Purwarianti4Rahayu Lestari5Faculty of Earth Science and Technonology, Institut Teknologi Bandung, Bandung 40132, IndonesiaFaculty of Earth Science and Technonology, Institut Teknologi Bandung, Bandung 40132, IndonesiaFaculty of Earth Science and Technonology, Institut Teknologi Bandung, Bandung 40132, IndonesiaFaculty of Earth Science and Technonology, Institut Teknologi Bandung, Bandung 40132, IndonesiaSchool of Electrical Engineering and Informatics, Institut Teknologi Bandung, Bandung 40132, IndonesiaFaculty of Earth Science and Technonology, Institut Teknologi Bandung, Bandung 40132, IndonesiaJava Island, located in Indonesia, is the country’s main island, with a population of 150 million, more than half the population of the country. There are at least four big cities located on the island that have seen fast development in the last 30 years. The land subsidence (LS) issue caused by groundwater overexploitation, compaction, and geological setting, has been known on the island for more than 20 years. However, past studies have mostly focused on one particular important area, while the big picture of LS on the whole island is often overlooked. This study utilized Sentinel-1 Synthetic Aperture Radar (SAR) data from 2017 to 2023, analyzed using Small Baseline Subset (SBAS) interferometry, to map LS across Java Island. We used DEMNAS to eliminate the topographic signal. We found ten regions with a noticeable LS rate, affecting nearly 60 million people who reside in the LS zones, namely, Serang, Greater Jakarta, Cianjur, Bandung, Cirebon, Brebes and Tegal, Pekalongan, Greater Semarang, Surabaya, and Sidoardjo. The highest rates and the large coverage of LS were observed in Greater Jakarta (up to 150 mm/year), Bandung (200 mm/year), Semarang (160 mm/year), and Pekalongan (up to 110 mm/year). LS was also detected in smaller areas or districts, such as Serang, Cianjur, Cirebon, Brebes, Tegal, Surabaya, and Sidoarjo, with rates ranging from 60 to 140 mm/year. The two areas of Cianjur and Brebes, which have never been mentioned in previous studies, show LS rates of about 80 mm/year and 70 mm/year, respectively. The LS rate in all areas was shown to be linear over time, except in Pekalongan, which shows rate deflation after 2021. We also found that most affected regions are urban and industrial zones, indicating a strong correlation with anthropogenic activities. LS leads to widespread socioeconomic and environmental impacts, including damage to infrastructure, increased flooding, and reduced groundwater capacity.https://www.mdpi.com/2076-3417/15/7/3732land subsidenceInSARrecursive least squares |
| spellingShingle | Teguh P. Sidiq Irwan Gumilar Hasanuddin Z. Abidin Irwan Meilano Ayu Purwarianti Rahayu Lestari Spatial Distribution and Monitoring of Land Subsidence Using Sentinel-1 SAR Data in Java, Indonesia Applied Sciences land subsidence InSAR recursive least squares |
| title | Spatial Distribution and Monitoring of Land Subsidence Using Sentinel-1 SAR Data in Java, Indonesia |
| title_full | Spatial Distribution and Monitoring of Land Subsidence Using Sentinel-1 SAR Data in Java, Indonesia |
| title_fullStr | Spatial Distribution and Monitoring of Land Subsidence Using Sentinel-1 SAR Data in Java, Indonesia |
| title_full_unstemmed | Spatial Distribution and Monitoring of Land Subsidence Using Sentinel-1 SAR Data in Java, Indonesia |
| title_short | Spatial Distribution and Monitoring of Land Subsidence Using Sentinel-1 SAR Data in Java, Indonesia |
| title_sort | spatial distribution and monitoring of land subsidence using sentinel 1 sar data in java indonesia |
| topic | land subsidence InSAR recursive least squares |
| url | https://www.mdpi.com/2076-3417/15/7/3732 |
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