Arisandy, Akhmad Sigit (2016) Studi Penentuan Aliran Hidrologi Metode Steepest Slope Dan Lowest Height Dengan Aster GDEMV2 Dan Alos Palsar (Studi Kasus : Gunung Kelud, Jawa Timur). Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Gunung Kelud memiliki ketinggian 1.731 mdpl dengan
kemiringan lebih dari 40º. Gunung Kelud terletak di Kabupaten
Kediri, Jawa Timur memiliki tipe erupsi stratovulkan dengan
karakteristik letusan eksplosit. Mempunyai nilai volcanic explosive
index 4, dengan durasi letusan ± 12 menit. Letusan gunung kelud
salah satunya menghasilkan aliran hidrologi yaitu berupa lahar
dan lava yang dapat memberikan ancaman tinggi bagi masyarakat
sekitar.
Data yang digunakan untuk penentuan aliran hidrologi (lahar
dan lava) tersebut adalah DEM Aster GDEMV2 dan Alos Palsar.
DEM memiliki informasi data ketinggian yang dapat digunakan
untuk memodelkan penentuan arah aliran hidrologi. Hasil
pemodelannya menyerupai bentuk di lapangan, sehingga dapat
digunakan untuk mitigasi bencana. Teknik penentuan aliran
hidrologi pada penelitian ini menggunakan metode steepest slope
dan lowest height berdasarkan teori aliran hidrologi.
Dari hasil arah pemodelan aliran metode steepest slope, arah
aliran hidrologi yang dominan dari Puncak Gunung Kelud adalah
menuju ke arah barat (21%), utara (19%), dan selatan(16%).Sedangkan untuk Metode lowest height lebih dominan menuju ke
arah barat (19%), barat laut (18%), dan barat laut (19%). dapat
disimpulkan bahwa aliran dominan menuju arah barat, barat laut,
barat daya, selatan dan utara. Sedangkan hasil perbandingan
akumulasi aliran yang di overlay dengan data BNPB, pada metode
steepest slope dari data DEM Aster GDEMV2 memiliki kesalahan
hasil aliran sebesar 9,81% sedangkan data DEM Alos Palsar
7,29%. Sedangkan metode lowest height dari data DEM Aster
GDEMV2 memiliki kesalahan hasil aliran sebesar 12,18%
sedangkan data DEM Alos Palsar 11,25%. Desa yang terdampak
letusan gunung kelud yaitu untuk Kabupaten Kediri 29 desa, Blitar
26 desa dan Malang 2 desa.
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Mount Kelud has a height of 1,731 meters above sea level with
a slope of more than 40º. Mount Kelud in Kediri, East Java has a
characteristic type of eruption stratovulkan with an eksplosive
eruption. The volcanic explosive index has a value of 4, with the
duration of the eruption is ± 12 minutes. The eruption of Mount
Kelud one of which resulted in hidrology flow in the form of lava
and that lava can provide a high threat to the surrounding
community.
Data used for the determination of hidrology flow (lahar and
lava) is DEM Aster GDEMV2 and Alos PALSAR. DEM has
information elevation data that can be used to model the
determination of hidrology flow direction. The results of the
modeling resembles the shape of the field, so it can be used for
disaster mitigation. Mechanical determination of hidrology flow in
this study using the method of steepest slope and lowest height is
based on the theory of hidrology flow.
From the results of modeling the flow direction of the steepest
slope method, hidrology dominant flow direction of the summit of
Mount Kelud is heading west (21%), the north (19%) and South (16%). As for the method is more dominant Lowest height towards
the west (19%), northwest (18%), and the northwest (19%). it can
be concluded that the dominant flow towards the west, northwest,
southwest, south and north. While the results of the comparison of
accumulated flow in the overlay with BNPB data, the method of
steepest slope of Aster GDEMV2 DEM data has errors result of
9.81%, while the flow of DEM data Alos PALSAR 7.29%. While the
method Lowest height of Aster GDEMV2 DEM data has errors
result of 12.18%, while the flow of DEM data Alos PALSAR
11.25%. Villages affected by the eruption of Kelud are 29 villages
in Kediri, 26 villages in Blitar and 2 villages Malang.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSG 624.183 41 Ari s |
| Uncontrolled Keywords: | Aliran Hidrologi, DEM, Steepest slope, lowest heights |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) > TA683 Precast concrete construction. Prestressed concrete construction. |
| Divisions: | Faculty of Civil Engineering and Planning > Geomatics Engineering > 29202-(S1) Undergraduate Thesis |
| Depositing User: | ansi aflacha |
| Date Deposited: | 26 Feb 2020 04:28 |
| Last Modified: | 26 Feb 2020 04:28 |
| URI: | http://repository.its.ac.id/id/eprint/75193 |
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