Ayuningsih, Ayuningsih and Utomo, Puji (2022) PEMODELAN SPASIAL DAMPAK KERUNTUHAN BENDUNGAN SEMPOR KABUPATEN KEBUMEN SPATIAL MODELING OF THE IMPACT OF THE SEMPOR DAM COLLAPSE, KEBUMEN REGENCY. Tugas Akhir thesis, University Technology Yogyakarta.
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Abstract
Disamping pembangunan bendungan yang memberikan banyak manfaat, ada bahaya yang mengancam jika terjadi keruntuhan pada bendungan. Tujuan dalam penelitian ini yaitu untuk mengetahui debit banjir rancangan kala ulang, peta wilayah banjir serta kedalaman banjir untuk setiap wilayah yang disebabkan oleh keruntuhan Bendungan Sempor. Dalam perhitungan debit banjir rancangan menggunakan HSS Nakayasu, penggambaran DAS menggunakan ArcGIS 10.3 dan untuk analisis hidraulika menggunakan program HEC-RAS 5.0.7. Dari hasil perhitungan didapatkan debit banjir rancangan kala ulang Q2 400.85 m³/det, Q5 513.52 m³/det, Q10 586.70 m³/det, Q20 659.88 m³/det, Q50 751.36 m³/det, Q100 820.88 m³/det, Q200 890.40 m³/det, Q500 981.87 m³/det, Q1000 1005.68 m³/det dan QPMF 2439.91 m³/det. Dari hasil pemodelan keruntuhan didapatkan 65 desa yang terdampak banjir dengan kedalaman yang berbeda yaitu Tunjungseto 3,579 m, Jatinegara 0,960 m, Benyiruyung 0,943 m, Sidayu 0,530 m, Wonosigro 0,528 m, Semanding 1,094 m, Gombong 0,550 m, Wonokriyo 0,631 m, Kalitengah 0,673 m, Gunungmuji 1,097 m, Semondo 0,728 m, Wonoyoso 0,872 m, Margosono 0,740 m, Banyumudal 0,966 m, Regodono 0,841 m, Karangsari 0,807 m, Sikayu 1,020 m, Buayan 0,635 m, Kamulyan 0,612 m, Tambaksari 1,061 m, Lemahduwur 1,500 m, Gemawang 0,805 m, Madureso 0,732 m, Harjodowo 1,202 m, Sidomukti 0,637 m, Wero 0,411 m, Kemukus 0,554 m, Banjarsari 0,443 m, Patemon 0,754 m, Panjangsari 0,476 m, Kedungpuji 0,313 m, Sawangan 0,724 m, Serut 0,913 m, Arjomulyo 1,206 m, Jatimulyo 0,629 m, Ori 0,674 m, Pondok Gebang Sari 1,217 m, Sukartejo 0,990 m, Bonjok 0,447 m, Purwodadi 1,798 m, Kalipurwo 1,417 m, Kuwarasan 0,737 m, Gandusari 0,741 m, Mangli 1,766 m, Kuwaru 1,281 m, Bendungan 1,416 m, Banjarejo 1,305 m, Sidodadi 0,883 m, Sidobunder 0,586 m, Regodadi 0,870 m, Geblug 0,692 m, Rangkah 0,504 m, Pesuruhan 0,752 m, Adiwarno 0,306 m, Weton Wetan 0,386 m, Kedaleman Kulon 0,547 m, Tegalsari 1,449 m, Kedaleman Wetan 0,121 m, Semampir 0,647 m, Purbowangi 0,644 m, Jatiroto 0,808 m, Sekomulyo 0,558 m, Sidoharum 0,790 m, Kalibeji 1,000 m dan Sempor 1,966 m. Kata kunci: Keruntuhan Bendungan Sempor, Debit Banjir Rancangan, HSS Nakayasu, HEC- RAS 5.0.7. In addition to the construction of dams that provide many benefits, there is an imminent danger in a dam collapse. This study aims to determine the design of flood discharge during the return period, a map of the flood area, and the flood depth for each area caused by the collapse of the Sempor Dam. In calculating the design flood discharge using the Nakayasu HSS, the depiction of the watershed using ArcGIS 10.3 and for hydraulic analysis using the HEC-RAS 5.0.7 program. From the calculation results, the design flood discharge during the return period Q2 is 400.85 m/s, Q5 513.52 m/s, Q10 586.70 m/s, Q20 659.88 m/s, Q50 751.36 m³/sec, Q100 820.88 m³/sec, Q200 890.40 m³/sec, Q500 981.87 m³/s, Q1000 1005.68 m³/s and QPMF 2439.91 m³/s. From the results of the collapse modeling, it was found that 65 villages were affected by floods with different depths. They are namely Tunjungseto 3,579 m, Jatinegara 0,960 m, Benyiruyung 0,943 m, Sidayu 0,530 m, Wonosigro 0,528 m, Semanding 1,094 m, Gombong 0,550 m, Wonokriyo 0,631 m, Kalitengah 0.673 m, Gunungmuji 1.097 m, Semondo 0.728 m, Wonoyoso 0.872 m, Margosono 0.740 m, Banyumudal 0.966 m, Regodono 0.841 m, Karangsari 0.807 m, Sikayu 1,020 m, Buayan 0.635 0.635 m, Lemah 0.612 , Gemawang 0.805 m, Madureso 0.732 m, Harjodowo 1.202 m, Sidomukti 0.637 m, Wero 0.411 m, Kemukus 0.554 m, Banjarsari 0.443 m, Patemon 0.754 m, Panjangsari 0.476 m, Kedung Puji 0,137 m, Sawanganyo 1,206 m, Jatimulyo 0.629 m, Ori 0.674 m, Pondok Gebang Sari 1.217 m, Sukartejo 0.990 m, Bonjok 0.447 m, Purwodadi 1.798 m, Kalipurwo 1.417 m, Kuwarasan 0.737 m, Gandusari 0.741 m, Mangli 1.766 m 1,416 m, Banjarejo 1,305 m, Sidodadi 0.883 m, Sidobunder 0.586 m, Regodadi 0.870 m, Geblug 0.692 m, Rangkah 0.504 m, Pesuruhan 0.752 m, Adiwarno 0.306 m, Weton Wetan 0.386 m, Kedaleman , Kulonsari 1.449 m Wetan 0.121 m, Semampir 0.647 m, Purbowangi 0.644 m, Jatiroto 0.808 m, Sekomulyo 0.558 m, Si doharum 0.790 m, Kalibeji 1,000 M and Sempor 1,966 m. Keywords: Sempor Dam Collapse, Design Flood Discharge, HSS Nakayasu, HEC-RAS 5.0.7.
| 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: | 21 Oct 2022 08:38 |
| Last Modified: | 21 Oct 2022 08:38 |
| URI: | http://eprints.uty.ac.id/id/eprint/11062 |
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