Studi Perencanaan Dan Uji Model Hidrolika Fishway Pada Bendung Gerak Sembayat

Aziza, Mona Is (2014) Studi Perencanaan Dan Uji Model Hidrolika Fishway Pada Bendung Gerak Sembayat. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bendung adalah bangunan air yang dibuat melintang sungai, membendung aliran sungai dan menaikkan level muka air di bagian hulu. Konstruksi bendung menyebabkan sifat kemenerusan (flow) sungai akan terinterupsi. Akibatnya, sungai menjadi alur aliran yang terpotong-potong. Alur yang terpotong ini menyebabkan perubahan keseimbangan alam, baik abiotik (fisik) maupun biotik (bio-ekologis). Keseimbangan abiotik akan terganggu, misalnya sedimen akan tertahan di bagian hulu dan erosi terjadi di bagian hilir dan terjadi defisit air di bagian hilir. Keseimbangan biotik juga terganggu, misalnya dengan terputusnya alur nutrisi dan jalur migrasi fauna air sungai. Dengan permasalahan yang ada maka diharapkan ikan dan habitat akuatik lainnya dapat melalui rintangan tersebut (tubuh bendung). Fishway didesain sesuai kapasitas ekologi serta kapasitas kriteria bendung itu sendiri. Dari hasil analisa,desain vertical slot dengan bentuk saluran bersekat dianggap memenuhi kriteria-kriteria tersebut. Sesuai kebutuhan migrasi ikan dan kesesuaian deesain maka didapatkan saluran fishway dengan ukuran panjang 23,75 m, lebar 1,5 m dan tinggi sekat bervariasi secara berjenjang dari ukuran 1 m hingga 1,35 (terdapat 20 sekat). Fishway ini memiliki debit aliran sebesar 0,115 m3 /det sehingga dapat dilalui oleh ikan-ikan jenis perenang sedang hingga cepat. ============================================================================================================= The barrage is a dam built across the river, used to block the water stream and raise the water level in the upstream portion of the river. The barrage construction causes the natural tidal and river flow to disrupted. As a result, the river flow becomes intermittent. This interrupted water flow causes a change of the natural balance, both abiotic (physical) and biotic (bio-ecologic). The natural balance of abiotic will be disrupted, for example, the sediment will be retained in the upstream and downstream erotion will occur, and this causes a water deficit in the downstream. The natural balance of biotic will also be disrupted, for example, a dissolution of the nutrients flow and the migration routes of water fauna. With this existing problems, it is expected that fish and the other aquatic habitats would be able to go through this blockade (the barrage). Fishway is designed in accordance to the ecological capacity and the barriage capacity itself. The analysis result shows that the pool passage design with sectional channels is considered to meet these criterias. In accordance with the need of fish migration and the suitability of the design, a fishway with a length of 23.75 m, a width of 1.5 m and the tiered bulkhead varies from 1 m to 1.35 (there are 20 bulkhead) is obtained. This fishway has a flow rate of 0.115 m 3 /sec so it can be passed by medium to fast swimmer types of fish.

Item Type: Thesis (Undergraduate)
Additional Information: RSS 627.82 Azi s 3100014056219
Uncontrolled Keywords: Bendung, Bendung Gerak, Ekosistem, Fishway, Vertical Slot
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
T Technology > TC Hydraulic engineering. Ocean engineering > TC167 Dams, reservoirs
Divisions: Faculty of Civil Engineering and Planning > Civil Engineering > 22201-(S1) Undergraduate Thesis
Depositing User: Yeni Anita Gonti
Date Deposited: 12 Oct 2020 01:46
Last Modified: 12 Oct 2020 01:46
URI: https://repository.its.ac.id/id/eprint/82106

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