Resmi, Awalina Lukmana Cita Resmi (2016) Analisis Land Subsidence Menggunakan Teknik Differential Interferometric Synthetic Aperture Radar (Dinsar) (Studi Kasus : Kota Surabaya, 2009-2011). Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.
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Abstract
Penggunaan air tanah yang berlebihan sebagai akibat dari
pertumbuhan penduduk yang sangat pesat di kota Surabaya, telah
menimbulkan efek negatif terhadap perkembangan aktivitas
masyarakat setempat, salah satunya adalah penurunan muka
tanah (land subsidence). Adanya proses dinamika bumi dan
kondisi geologi kota Surabaya turut memicu terhadap laju
kecepatan land subsidence. Terjadinya proses land subsidence ini
juga menyebabkan semakin membesarnya daerah intrusi air laut
di kota Surabaya.
Dalam penelitian ini digunakan teknik Differential
Interferometric Synthetic Aperture Radar (DInSAR). DInSAR
merupakan teknologi pencitraan radar yang menghasilkan citra
interferogram, dimana citra interferogram digunakan untuk
melakukan proses pemantauan terhadap laju pergerakan tanah
dengan ketelitian sub-sentimeter. Dalam penelitian land
subsidence kota Surabaya dilakukan proses pengolahan DInSAR
dari tiga buah citra satelit ALOS PALSAR tahun 2009, 2010, dan
2011 menggunakan metode two-pass interferometric. Metode twopass
interferometric merupakan metode yang menggunakan dua
buah citra SAR dan Digital Elevation Model (DEM).
Hasil processing menunjukkan terjadinya land subsidence
selama 3 tahun (2009-2011) berdasarkan displacement Line of
Sight (LOS) kota Surabaya berkisar antara 0 sampai -25 mm
untuk Surabaya Utara, 0 sampai -25 mm di Surabaya Selatan, 0
sampai -100 mm di Surabaya Timur, 0 sampai -25 mm di
Surabaya Barat, dan 0 sampai -25 mm di Surabaya Pusat,
sehingga rata-rata besar nilai subsidence kota Surabaya sebesar
0 sampai -25 mm. Sedangkan rata-rata laju subsidence di kota
Surabaya antara tahun 2009-2011 berkisar antara -5 mm/tahun.
Namun dalam pengolahan masih menunjukkan error
displacement, dikarenakan nilai koherensi antar citra yang
rendah, noise, distorsi geometrik dari sinyal radar dan besar
baseline pada pasangan citra. Untuk itu diperlukan analisa
dengan membandingkan beberapa penelitian yang terkait
subsidence di kota Surabaya.
=========================================================================================The use of excessive ground water as a result of rapid
population growth in the Surabaya city can triger, surface
deformations on the affected area, one of which is land
subsidence. The presence of the dynamic processes of the Earth
and geological conditions of the Surabaya city, also can the speed
rate of land subsidence. The process of land subsidence also
cause the enlargement area of sea water intrusion in the
Surabaya city.
In this research, the technique of Differential Interferometric
Synthetic Aperture Radar (DInSAR) is used to infer the surface
deformation in the Surabaya city . DInSAR is a radar imaging
technology that produces the interferogram image, that the result
can be used to monitor the rate of soil movement with subcentimeter
accuracy. The DInSAR processing utilized three
PALSAR ALOS satellite images from 2009, 2010, and 2011 using
two-pass interferometric. Two-pass interferometric method is a
method that uses two SAR imagery and Digital Elevation Model
(DEM).
The results indicate the occurrence of land subsidence based
on the displacement Line of Sight (LOS) Surabaya city. The
values are ranged from 0 to -25 mm for North Surabaya, 0 to -25mm in South Surabaya, 0 to -100 mm in East Surabaya, 0 to -25
mm in West Surabaya, and 0 to -25 mm in Surabaya Center. As
such, the average subsidence in Surabaya city has a value
between 0 and -25 mm. While average velocity subsidence in
Surabaya city has value -5 mm/year. However, the result still
contain an error from the processing of displacement, due to the
value of coherence between the image, noise, geometric distortion
of a radar signal and large baseline on image pair
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSG 551.307 Res a |
| Uncontrolled Keywords: | Land Subsidence, ALOS PALSAR, DInSAR, air tanah. |
| Subjects: | H Social Sciences > HT Communities. Classes. Races > HT133 City and Towns. Land use,urban |
| Divisions: | Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 11 Mar 2020 01:32 |
| Last Modified: | 11 Mar 2020 01:32 |
| URI: | http://repository.its.ac.id/id/eprint/75433 |
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