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All Journal Proceeding ISETH (International Summit on Science, Technology, and Humanity) Jurnal Teknik Sipil
Robby Yussac Tallar
Universitas Kristen Maranatha
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Medicine & Pharmacology Social Sciences Other

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Penggerusan Sedimen di Dasar Sungai Bagian Hilir Kolam Olak Suatu Bendung Tertentu Christine, Maria; Tallar, Robby Yussac
Jurnal Teknik Sipil Vol 1 No 1 (2003): Jurnal Teknik Sipil
Publisher : Universitas Kristen Maranatha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28932/jts.v1i1.10335

Abstract

In planning a water structure such as a weir, it is necessary to first study the problem of local scouring that occurs downstream of the structure. Local scouring problems occur as a result of water velocity and turbulence exceeding the resistance of the channel or river bed material. In this study, a square-shaped channel with a certain size and base slope was used to find the depth of local scouring along with the dry volume of sediment carried. Through 6 experiments by averaging the discharge on the 2 discharge gauges used, the deepest local scour that occurred was 3.8 cm; 4 cm; 4.3 cm; 4.5 cm, 4.8 cm; 5.1 cm and the dry volume of sediment carried was 8305 cm3; 12915 cm3; 18505.71 cm3; 23331.43 cm3; 28760 cm3, 29960.71 cm3. In this study, it can be concluded that Lacey's formula is the closest to laboratory results after reaching equilibrium. The amount of sediment volume carried, is strongly influenced by the diameter of sediment grains, flow discharge, flow velocity and channel slope. The greater the flowing discharge, at a certain time will produce constant scouring. This is because a balance has been reached. The deeper the local scour that occurs, it can be concluded that the more sediment volume is carried downstream of the weir.
Classification of Meandering Rivers: Interpreting the Morphological River by Using the Planimetric Characteristics Sukamto, Yuri; Tallar, Robby Yussac; Trisina, William
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2015: Proceeding ISETH (International Conference on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/iseth.2342

Abstract

It must be recognized that rivers differ among themselves, and through time,one river can vary significantly in itsdownstream direction. Most of the riversclassification was published by US or European researchers. In fact, these classifications of the river cannot be applied thoroughly to other regions such Asian Countries due to its differentcharacteristics and situations. Therefore, the general purpose of thisresearch is to establish a simple and easy-touse practice in interpreting the morphological aspect of river by using planimetric characteristics. We selected four major rivers to develop the conceptual model for classification of meandering rivers in Borneo (Kalimantan) Island. Further, we divided themeandering rivers in Borneo Island by three zones to get the informed data in detail. Based on the results, the variability variesin all planimetric characteristics except the slope, which is considered as conformity.
Co-Authors Maria Christine Sukamto, Yuri William Trisina