STUDI KEDALAMAN DAN POLA GERUSAN LOKAL YANG TERJADI DI HILIR BENDUNG DENGAN KOLAM OLAKAN TIPE BUCKET DAN USBR III

-, Wisafri and Agus, Indra and -, Apwiddhal (2014) STUDI KEDALAMAN DAN POLA GERUSAN LOKAL YANG TERJADI DI HILIR BENDUNG DENGAN KOLAM OLAKAN TIPE BUCKET DAN USBR III. Rekayasa Sipil, 11 (2). pp. 57-68. ISSN 1858-3695

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Abstract

Most of spillways failure in Indonesia are caused by local scouring that happens continuously at downstream, and at time local scouring get the foot of spillway will dangerous for its operational. This scour occurs because of advanced value of specific energy overflow with high head relatively so that it appear unbalance velocity flow and turbulence flow. An effort to protect foot spillway is build the structure energy dissipator. From this concept at foot spillway is designed with one, two, or more energy dissipator agree with condition and many variables at deform process mechanism appropriately. At laboratory two dimensional physical test had done the consideration of spillway with bucket of type stilling basin to conventional spillway and having USBR III stilling basin at many discharges pattern and its influence for hydraulic jump bucket flow, energy reduction, along with local scour at downstream. This local scouring was caused by major water flowing passing the dam where there is a high difference level between the top and the end of the dam. Furthermore, it generates inbalancing water flow speed and additional water turbulence. There are different approachs to prevent such damage, and for example by providing one or more additional construction at the end part of the dam. This structure is designed and installed at the bottom part of the dam. Various empirical functions have been developed to design this structure, and one of them is developed by Lacey, Laursen, Froehlich, Mellvile and so on. However, that function has some limitation. For examples are the local river and dam construction characteristics. Therefore, it is required to be validated by developing a model of dam contructed in a laboratory. Experiments was undertaken by using the model with different characteristics of water flow in order to investigate the scouring pattern

Item Type:Article
Subjects:G Technology > GA Engineering (General). Civil engineering (General)
Divisions:Jurusan Teknik Sipil > Prog.Studi Teknik Sipil-D3 > Jurnal/Karya Ilmiah
ID Code:197
Deposited By:Mr. OP Repo-2 Puskom
Deposited On:11 Oct 2016 08:35
Last Modified:09 Nov 2016 14:10

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