Cahyanti, Amalia Hari (2023) Analisis Kapasitas Pengendali Banjir Bendungan Bagong dengan Penambahan Pintu pada Spillway. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Spillway merupakan bangunan hidrolik yang dibangun untuk menyalurkan aliran banjir lewat bendungan dengan tanpa membahayakan keamanan bendungan. Dari kelebihan kapasitas yang sudah meluap (overtopping) tersebut nantinya akan dialirkan ke bagian hilir. Bendungan dengan tambahan pintu pada pelimpah terbukti memiliki kemampuan mengurangi debit banjir dibandingkan dengan bendungan sejenis tanpa pintu atau pelimpah tetap. Kedudukan bangunan pelimpah sebagai tombak bangunan pengaman bendungan dari limpasan mengharuskan ketelitian dalam perencanannya. Waduk yang dibangun nantinya harus mampu menyimpan kapasitas air guna memenuhi kebutuhan air dan aman terhadap banjir yang direncanakan, sehingga diperlukan perencanaan pintu air spillway yang mampu mereduksi banjir. Dalam proyek akhir ini dilakukan analisis hidrologi yang nantinya akan digunakan sebagai dasar perencanaan. Setelah itu, direncanakan penambahan pintu spillway. Sistem operasi pintu yang dilakukan dengan menggunakan bantuan software HEC-HMS. Analisis yang dilakukan dengan membuat 5 skenario yang akan diterapkan menjadi beberapa kondisi. Pada sistem operasi pintu ini ditinjau sesuai perencanaan menggunakan debit banjir rancangan Q1000 dan sebagai kontrol menggunakan QPMF. Hasil perhitungan didapatkan perencanaan pintu spillway dengan desain tipe pintu slide gate. Dimensi pintu dengan lebar 6.3 m, tinggi pintu 3.5 m, dan lebar pilar 1.6 m. Kemudian hasil pemodelan menunjukkan bahwa pola operasi pintu yang memenuhi syarat jagaan minimum untuk Q1000 menghasilkan prosentase retensi tebesar yaitu 67.88% pada skenario 4 dengan bukaan 1 m. Sedangkan hasil pemodelan pola operasi pintu yang memenuhi syarat jagaan minimum untuk QPMF menghasilkan prosentase retensi terbesar yaitu 42.16% pada skenario 4 dengan bukaan pintu 3 m.
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Spillway is a hydraulic structure built to drain flood waters through a dam without compromising the safety of the dam. The excess capacity that has already overflowed (overtopped) will later be channeled downstream. Dams with additional gates on the spillway have been shown to have the ability to reduce flood discharge compared to similar dams without gates or fixed spillways. The position of the spillway building as the piers of the dam from runoff requires careful planning. The reservoir that will be built later must be able to store water capacity to meet water needs and be safe from planned floods, so it is necessary to plan a spillway sluice that is able to reduce floods. In this final project a hydrological analysis is carried out which will later be used as a basis for planning. After that, added the addition of a spillway gates. The gates operating system is carried out using the help of the HEC-HMS software. The analysis was carried out by making 5 scenarios that will be applied to several conditions. In this gate operating system, it is reviewed according to the plan using the Q1000 flood discharge design and as a control using QPMF. The results of the calculation of the spillway gates planning with the design of the slide gates type. The dimensions of the gates are 6.3 m wide, 3.5 m high, and 1.6 m wide pillars. Then the modeling results show that the gates operating pattern that meets the minimum guard requirements for Q1000 produces the largest retention percentage, namely 67.88% in scenario 4 with an opening of 1 m. Meanwhile, the results of modeling the gates operating pattern that meets the minimum guard requirements for QPMF produce the largest retention percentage, namely 42.16% in scenario 4 with a gate opening of 3 m.
Item Type: | Thesis (Other) |
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Uncontrolled Keywords: | spillway, pintu spillway, sistem operasi, retensi |
Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC167 Dams, reservoirs T Technology > TC Hydraulic engineering. Ocean engineering > TC555 Spillways. Energy dissipation. Hydraulic jump. |
Divisions: | Faculty of Vocational > Civil Infrastructure Engineering (D4) |
Depositing User: | Amalia Hari Cahyanti |
Date Deposited: | 29 Aug 2023 07:16 |
Last Modified: | 29 Aug 2023 07:16 |
URI: | http://repository.its.ac.id/id/eprint/103896 |
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