Utomo Prasetyo, Suryo and Utomo, Puji (2021) ANALISIS DEBIT BANJIR RANCANGAN DAN PEMODELAN KERUNTUHAN BENDUNGAN SERMO KABUPATEN KULON PROGO MENGGUNAKAN PROGRAM HEC-RAS 5.0.7 ANALYSIS OF DESIGN FLOOD DISCHARGE AND THE SERMO DAM COLLAPSE MODELING IN KULON PROGO DISTRICT USING HEC-RAS 5.0.7. Tugas Akhir thesis, University Technology Yogyakarta.
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Abstract
ABSTRAK Bendungan juga memiliki risiko yang tinggi. Salah satunya yaitu jika terjadi keruntuhan bendungan. Keruntuhan bendungan pastinya akan mengakibatkan terjadinya bencana banjur. Oleh karena itu, dilakukan penelitian yang bertujuan untuk mendapatkan debit banjir rancangan dan mengetahui wilayah yang terdampak jika Bendungan Sermo mengalami keruntuhan. HSS Gama I digunakan untuk perhitungan debit banjir rancangan. Penentuan parameter dan penggambaran DAS menggunakan program ArcGIS 10.3. Pada analisis hidraulika, digunakan program HEC-RAS 5.0.7 untuk pemodelan keruntuhan bendungan. Dari hasil perhitungan debit banjir rancangan diperoleh nilai debit banjir rancangan kala ulang dan PMF berturut-turut adalah Q2; 91,033 m3/s, Q5; 127,020 m3/s, Q10; 144,283 m3/s, Q20; 158,600 m3/s, Q50; 174,511 m3/s, Q100; 183,793 m3/s, Q200; 190,422 m3/s; Q500; 198,378 m3/s, Q1000; 203,682 m3/s, QPMF; 1016,698 m3/s. Dari pemodelan keruntuhan Bendungan Sermo diketahui 16 Desa yang terdampak beserta karakteristik (kedalaman) banjir rata-rata yaitu Hargowilis; 6,891 m, Karangsari; 8,111 m, Sendangsari; 4,384 m, Banyuroto; 3,380 m, Pengasih; 2,135 m, Margosari; 3,227 m, Wates; 2,326 m, Giripeni; 1,760 m, Triharjo; 2,205 m, Bendungan; 3,383 m, Tayuban; 2,795 m, Gotakan; 1,856 m, Karangwuni; 1,307 m, Plumbon; 4,198 m, Kalidengen; 2,312 m, Glagah; 1,814 m. Kata kunci: Keruntuhan, Bendungan Sermo, HSS Gama I, HEC-RAS. ABSTRACT Dams also have a high risk. One of them is if there is a dam collapse. A dam collapse would inevitably lead to catastrophic events. Therefore, a study was carried out aimed at obtaining the planned flood discharge and the affected area if the Sermo Dam collapsed. HSS Gama I is used for design flood discharge calculations. Determination of parameters and delineation of watersheds using the ArcGIS 10.3 program. In the hydraulic analysis, the HEC-RAS 5.0.7 program is used for dam failure modeling. From the results of the calculation of the design flood discharge, the value of the design flood discharge and PMF is Q2; 91,033 m3 / s, Q5; 127,020 m3 / s, Q10; 144,283 m3 / s, Q20; 158,600 m3 / s, Q50; 174,511 m3 / s, Q100; 183,793 m3 / s, Q200; 190,422 m3 / s; Q500; 198,378 m3 / s, Q1000; 203,682 m3 / s, QPMF; 1016,698 m3 / s. From the modeling of the collapse of the Sermo Dam, it was found that 16 villages were affected along with the average flood depth, namely Hargowilis; 6,891 m, Karangsari; 8.111 m, Sendangsari; 4,384 m, Banyuroto; 3,380 m, Pengasih; 2,135 m, Margosari; 3,227 m, Wates; 2,326 m, Giripeni; 1,760 m, Triharjo; 2,205 m, Dam; 3,383 m, Tayuban; 2,795 m, Gotakan; 1,856 m, Karangwuni; 1,307 m, Plumbon; 4,198 m, Kalidengen; 2,312 m, Glagah; 1,814 m. Keywords: collapse, Sermo Dam, HSS Gama I, HEC-RAS.
| Item Type: | Thesis (Skripsi, Tugas Akhir or Kerja Praktek) (Tugas Akhir) |
|---|---|
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Fakultas Sains dan Teknologi > S1 Teknik Sipil |
| Depositing User: | Kaprodi S1 Teknik Sipil UTY |
| Date Deposited: | 30 Dec 2021 08:39 |
| Last Modified: | 30 Dec 2021 08:39 |
| URI: | http://eprints.uty.ac.id/id/eprint/7307 |
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