Citra, Yuli Yulia (2017) ANALISA PROBABLE MAXIMUM FLOOD (PMF) TERHADAP KAPASITAS TAMPUNGAN AIR WADUK JATIGEDE. S1 thesis, Universitas Pendidikan Indonesia.
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Abstract
Ada banyak manfaat bendungan, contohnya PLTA dan irigasi. Namun, bendungan juga dapat menimbulkan bahaya jika tidak dioperasikan dengan baik, termasuk kemungkinan terjadinya overtopping akibat Probable Maximum Flood (PMF). Agar terhindar dari bahaya overtopping yang disebabkan oleh debit PMF perlu dilakukan rekayasa terhadap debit release yang keluar melalui pintu spillway pada saat kondisi awal muka air waduk di elevasi tertentu. Penelitian ini melakukan rekayasa genangan waduk dengan mensimulasikan release melalui pintu spillway. Analisa memperhitungkan kondisi awal muka air waduk di elevasi +247 (mercu spillway), elevasi +258,25 (control water level), dan elevasi +260 (muka air normal). Hasil penelitian menunjukan apabila terjadi debit PMF pada saat kondisi awal muka air waduk di elevasi +247 (mercu spillway), akan terjadi kenaikan muka air waduk mencapai elevasi +253,47 m. Penurunan muka air waduk dapat dilakukan dengan release melalui tiga pintu tinggi bukaan 1,1 m, debit release maksimum sebesar 319,5 m3/det dan waktu yang diperlukan 7,4 hari. Pada awal muka air waduk di elevasi +258,25 (control water level), akan terjadi kenaikan muka air waduk mencapai elevasi +263,32 m. Penurunan muka air waduk dapat dilakukan dengan release melalui tiga pintu tinggi bukaan 0,83 m, debit release maksimum sebesar 399,7 m3/det dan waktu yang diperlukan 16,8 hari. Kemudian, untuk awal muka air waduk di elevasi +260 (muka air normal), akan terjadi kenaikan muka air waduk mencapai elevasi +264,67 m. Penurunan muka air waduk dapat dilakukan dengan release melalui empat pintu terbuka tinggi bukaan 0,598 m, debit release maksimum sebesar 399,5 m3/det dan waktu yang diperlukan 18,5 hari. ;--- There are many benefits of dams, for example hydropower and irrigation. However, dams can also be dangerous if not operated properly, including the possibility of overtopping due to the Probable Maximum Flood (PMF). To avoid overtopping caused by PMF discharge, release through the spillway needs to be adjusted, on the initial conditions of water level at a certain elevation. The calculation was done by engineering pool of reservoir with simulation the release passing through the spillway gate. The analysis was performed on the initial conditions of water level at elevation +247 (crest spillway), elevation of +258.25 (control water level), and the elevation +260 (normal water level). The results showed that when the initial conditions of water level at elevation +247 (crest spillway), PMF discharge will raise the water level to the elevation of +253.47 m. Reservoir water level decreased to the initial elevation with the release through three gates height of 1.1 m, the maximum discharge of 319.5 m3/sec and takes 7.4 days. When the initial conditions of water level at elevation +258,25 (control water level), PMF discharge will raise the water level to the elevation of +263,32 m. Reservoir water level decreased to the initial elevation with the release through three gates height of 0.83 m, the maximum discharge of 399.7 m3/sec and takes 16.8 days. When the initial conditions of water level at elevation +260 (normal water level), PMF discharge will raise the water level to the elevation of +264,67 m. Reservoir water level decreased to the initial elevation with the release through four gates height of 0,598 m, the maximum discharge of 399,5 m3/sec and takes 18,5 days.
| Item Type: | Thesis (S1) |
|---|---|
| Additional Information: | No. Panggil : S TS CIT a-2017 ; Pembimbing : I. Mardiani , II. Dedi Purwanto . |
| Uncontrolled Keywords: | probable maximum flood (PMF), overtopping, spillway, Release. |
| Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Fakultas Pendidikan Teknologi dan Kejuruan > Jurusan Pendidikan Teknik Sipil > Program Studi Teknik Sipil |
| Depositing User: | Mr. Arif Rezkyana Nugraha |
| Date Deposited: | 07 Feb 2018 09:04 |
| Last Modified: | 07 Feb 2018 09:04 |
| URI: | http://repository.upi.edu/id/eprint/29266 |
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