Analisis Time Series Penurunan Muka Tanah Kawasan Lahan Gambut Palangkaraya Berbasis PSDS-InSAR

Salsabila, Andini Azkiyatus (2025) Analisis Time Series Penurunan Muka Tanah Kawasan Lahan Gambut Palangkaraya Berbasis PSDS-InSAR. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penurunan muka tanah pada lahan gambut menjadi permasalahan yang berdampak cukup luas, contohnya pada gangguan ekosistem, peningkatan risiko banjir, dan kerusakan infrastruktur. Provinsi Kalimantan Tengah, khususnya kawasan Palangkaraya, merupakan salah satu wilayah dengan lahan gambut terluas yang mengalami ancaman ini. Studi ini bertujuan untuk menganalisis pola dan kecepatan deformasi vertikal menggunakan pendekatan Persistent Scatterer-Distributed Scatterer Interferometric Synthetic Aperture Radar (PSDS-InSAR) berbasis citra Sentinel-1 dan ALOS PALSAR-2 periode 2017-2022. Metode ini menggabungkan keunggulan teknik Persistent Scatterer (PS) untuk area urban dan Distributed Scatterer (DS) untuk area vegetasi untuk meningkatkan kepadatan piksel deformasi sehingga menghasilkan cakupan spasial yang lebih luas. Data diolah menggunakan perangkat lunak dari ISCE Framework, dengan validasi hasil menggunakan data ketinggian muka air tanah. Penurunan muka tanah yang terjadi pada kawasan lahan gambut Palangkaraya terjadi selaras dengan kondisi hidro-klimatologis di wilayah tersebut. Terlihatnya pola penurunan muka tanah ketika musim kemarau serta menurunnya kandungan air tanah. Kecepatan pergerakan muka tanah bervariasi dari -4,1 – 2,4 cm/tahun dan -1,53 – 1,08 cm/tahun untuk masing-masing satelit Sentinel-1 (RMSE = 0,3789) dan ALOS PALSAR-2 (RMSE = 0,6853) dengan nilai negatif menunjukkan adanya subsidence dan nilai positif menunjukkan adanya uplift.
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Land subsidence on peatlands is a problem with far-reaching impacts, such as ecosystem disruption, increased flood risk, and infrastructure damage. Central Kalimantan Province, especially the Palangkaraya area, is one of the areas with the largest peatland is also experiencing this threat. This research aims to analyze the pattern and speed of land subsidence in the area using the Persistent Scatterer-Distributed Scatterer Interferometric Synthetic Aperture Radar (PSDS-InSAR) method and radar imagery from Sentinel-1 and ALOS PALSAR-2 within 2017-2022 time period. This method combines the advantages of the Persistent Scatterer (PS) technique for urbanized areas and the Distributed Scatterer (DS) for vegetated areas to increase the deformation pixel density, resulting in wider spatial coverage. The data were processed using software from ISCE Framework, with validation of the results using groundwater level data. The subsidence happened in the peatland area of Palangkaraya is aligned with hydro-climatological properties in that area. A subsidence is observed happening in the dry season where the groundwater level is decreased. The vertical velocity varies from - 4,1 – 2,4 cm/year and -1,53 – 1,08 cm/year for Sentinel-1 (RMSE = 0,3789) and ALOS PALSAR-2 (RMSE = 0,6853), respectively. Negative values indicates subsidence meanwhile positive values indicates uplift.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Penurunan Tanah, Lahan Gambut, Kalimantan Tengah, PSDS-InSAR, ALOS PALSAR-2, Sentinel-1, Land Subsidence, Peatland, Central Kalimantan
Subjects:	G Geography. Anthropology. Recreation > G Geography (General) > G70.217 Geospatial data G Geography. Anthropology. Recreation > G Geography (General) > G70.5.I4 Remote sensing
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Andini Azkiyatus Salsabila
Date Deposited:	23 Jul 2025 08:38
Last Modified:	23 Jul 2025 08:38
URI:	http://repository.its.ac.id/id/eprint/120906

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