LAND SUBSIDENCE STUDY USING GEODETICS GPS AND GAMIT/GLOBK SOFTWARE (Case Study : Banjarasri Village and Kedungbanteng Village, Tanggulangin District, Sidoarjo Regency)

Ryanda, Kevin and Handoko, Eko Yuli and Maulida, Putra (2021) LAND SUBSIDENCE STUDY USING GEODETICS GPS AND GAMIT/GLOBK SOFTWARE (Case Study : Banjarasri Village and Kedungbanteng Village, Tanggulangin District, Sidoarjo Regency). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Banjir merupakan salah satu bencana alam yang selalu
terjadi di berbagai Wilayah Negara Kesatuan Republik
Indonesia. Tercatat beberapa titik banjir terjadi di Desa
Banjarasri dan Desa Kedungbanteng, Kecamatan Tanggulangin,
Kabupaten Sidoarjo. Terdapat dugaan bahwa salah satu faktor
penyebab banjir di kedua desa tersebut disebabkan oleh adanya
penurunan tanah (land subsidence). Oleh karena itu, perlu
dilakukan studi untuk memantau besarnya penurunan tanah di
kawasan tersebut. Dalam penelitian ini digunakan metode
pengamatan Global Positioning System (GPS). Penelitian
dilakukan dengan pengambilan data sebanyak enam titik yang
dilakukan selama tiga kala kala, yaitu pada tanggal pada 22 – 27
Oktober 2020, 24 - 29 November 2020, dan 24 – 29 Maret 2021.
Berdasarkan hasil pengolahan dan analisis data GPS, diperoleh
nilai pergeseran dan pergerakan vektor pengamatan. Tercatat
lima titik mengalami penurunan tanah secara signifikan yang
meliputi BM02, BM03, BM04, BM05, dan BM06 dengan nilai
masing-masing sebesar 3,6 cm, 7,3 cm. 5,9 cm, 4,8 cm, dan 5,2
cm. Vektor pergerakan lokal posisi horisontal bergerak secara
beragam dimana BM01 dan BM04 mengalami pergerakan ke
arah barat daya dengan pergeseran 2,5 cm dan 1,4 cm, BM 02
dan BM03 bergerak ke arah barat laut dengan pergeseran 1,0 cm
vi
dan 1,3 cm, BM05 bergerak ke arah tenggara dengan pergeseran
2,5 cm, dan BM06 bergerak ke arah timur laut dengan
pergeseran sebesar 3,8 cm.
Kata Kunci—GPS, Deformasi, Penurunan Tanah
==================================================================================================================
Floods are one of the natural disasters that always occur
in various regions in the Republic of Indonesia. Several flood
points were recorded in Banjarasri Village and Kedungbanteng
Village, Tanggulangin District, Sidoarjo Regency. There is an
allegation that one of the factors causing the flooding in the two
villages was caused by land subsidence. Therefore, it is necessary
to conduct a study to monitor the magnitude of land subsidence in
the area. In this study, the Global Positioning System (GPS)
observation method was used. The research was carried out by
collecting data from six points which were carried out over three
periods of time, namely on 22 – 27 October 2020, 24 – 29
November 2020, and 24 – 29 March 2021. Based on the results of
processing and analyzing GPS data, the observed values for shift
and motion vectors are obtained. Five points that experienced
significant land subsidence, including BM02, BM03, BM04,
BM05, and BM06 with values of 3.6 cm, 7.3 cm, 5.9 cm, 4.8 cm,
and 5.2, cm respectively. The local movement vectors of
horizontal positions move in various ways, where BM01 and
BM04 move to the southwest with a displacement of 2.5 cm and
1.4 cm, BM 02 and BM03 move to the northwest with a
displacement of 1.0 cm and 1.3 cm, BM05 moves to the southeast
viii
with a displacement of 2.5 cm, and BM06 moves to the northeast
with a displacement of 3.8 cm.
Keywords —GPS, Deformation, Land Subsidence

Item Type:	Thesis (Undergraduate)
Uncontrolled Keywords:	GPS, Deformation, Land Subsidence GPS, Deformasi, Penurunan Tanah
Subjects:	Q Science Q Science > QE Geology Q Science > QE Geology > QE604 Deformation
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geomatics Engineering > 29202-(S1) Undergraduate Thesis
Depositing User:	Kevin Ryanda
Date Deposited:	20 Aug 2021 07:37
Last Modified:	20 Aug 2021 07:37
URI:	http://repository.its.ac.id/id/eprint/86421

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