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Ira Mutiara Anjasmara

Departemen Teknik Geomatika Institut Teknologi Sepuluh Nopember

Author-ID : 2773625

Computer Science & IT Engineering

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Application of PS-InSAR Method for the Land Subsidence Analysis Using StaMPS (Case Study : Gresik Regency) Rizki Fahrudin Ulin; Muhammad Taufik; Ira Mutiara Anjasmara
IPTEK Journal of Proceedings Series No 2 (2019): The 3rd Geomatics International Conference (GEOICON) 2018
Publisher : Institut Teknologi Sepuluh Nopember

Land Subsudence often occurs in various regions around the world, especially big cities and coastal areas. The poor impact of land subsidence may the destruction of a region's infrastructure which caused by excessive water taking for industrial use and existing soil forming structures in the area. Therefore, it is necessary to find various inventions with the aim to mitigate natural disasters accurately. Along with the development of technology, then used adequate technology that has wide area capability. The selection of PS-InSAR method based on Radar becomes the best solution because it has good accuracy and decrease the decorrelation effect. The method used by PS-InSAR in the process of land subsidence in Gresik Regency using StaMPS at the same time with the decrease of ground level between -49.35 mm / year to 54,95 mm / year. Bungah Sub-district has the maximum value from the period before May 2015 to January 2016.

Deformation Analysis of Bromo Mountain Caused by Eruption Activity in December 2015-February 2016 Using Differential Interferometry Synthetic Aperture Radar (DInSAR) Imelda Vinny Aprillisa; Muhammad Taufik; Ira Mutiara Anjasmara
IPTEK Journal of Proceedings Series No 2 (2019): The 3rd Geomatics International Conference (GEOICON) 2018
Publisher : Institut Teknologi Sepuluh Nopember

Bromo mountain is one of the most active volcanoes in East Java. In December 2015 - January 2016 the Center for Volcanology and Geological Hazard Mitigation detected increased activities on Bromo mountain. The existence of volcanic activities cause a deformations on the surface of Bromo mountain. The existing deformations on the surface of Mount Bromo can be measured with various technologies such as using DInSAR. In this study, the analysis of deformation on the surface of Mount Bromo are done by DInSAR processing using two-pass method and using five Sentinel-1A satellite imagery in November 2015, December 2015, January 2016, February 2016, and March 2016 and DEM SRTM 30 meters. The results show that the two-pass method of DInSAR can reflect the increased activities in Bromo mountain that cause the deformation of the surface where the majority of deformations occur at the caldera of Bromo mountain. From this method, the result of LOS (Line of Sight) displacement value indicates that the maximum subsidence occured in December 2015 - January 2016 with the value -20 mm s / d -60 mm it indicates if there were some increased activities on the crater of Bromo mountain in December 2015 to January 2016. While the maximum uplift occurred in February 2016 - March 2016 with the value 0 mm s / d 40 mm it indicates if the activities on the crater of Bromo mountain was decreasing. However, in order validate the accurate value of deformation, it is necessary to compare with other measurements or measuring directly in the field

Analysing Peatland Subsidence in Pelalawan Regency, Riau Using DInSAR Method Ruli Dwi Susanti; Ira Mutiara Anjasmara
IPTEK Journal of Proceedings Series No 2 (2019): The 3rd Geomatics International Conference (GEOICON) 2018
Publisher : Institut Teknologi Sepuluh Nopember

Indonesia is known as a country that have the largest peatland in Southeast Asia. Peatland is often used in agricultural, plantation and settlement purposes. Before, peatland must be drained as one procedure of land clearing activity. However, an error during this process often comes and cause some problems such as drought, subsidence and even forest fire. A characteristic of peatland, irrewetable, making peatland is very hard to be wet after getting dry. This research is aiming to observe peatland subsidence in Pelalawan Regency, Riau using SAR data Sentinel 1-A. The method that we use is Differential Interferometry Synthetic Aperture Radar (DInSAR). Beside Sentinel 1-A, DEM STRTM is used to remove topographic effect. Temporal baseline in this research is about one year between two acquisition data. The first pair of data is acquired in June 2015 and June 2016. While the second pair of data is acquired in June 2016 and July 2017. By using two pass DInSAR method, the process will yield two images of Line of Sight (LOS) Displacement during each period. The first DInSAR (June 2015-June 2016) reveals that the highest subsidence that occur in peatland is about 109,113 mm and the highest uplift is about 108,089 mm. The second DInSAR (June 2016-July 2017) reveals that the highest peat subsidence is about 251,842 mm and the highest uplift is about 73,715 mm.

Co-Authors Andika Mauradhia Arifatul Mu'amalah Cindy Nandya Riastama Enira Suryaningsih Estu Kriswati Imelda Vinny Aprillisa Kurniawan, Akbar Muhammad Taufik Rani Fitri Febriyanti Rizki Fahrudin Ulin Ruli Dwi Susanti Sajidah Salsabil Susilo Susilo Tio Koeswoyo Wahyunan Andika

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