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All Journal Jurnal Scientia Journal of Scientech Research and Development Jurnal Teknik Sipil Macca Innovative: Journal Of Social Science Research
Ali Mallombasi
Universitas Muslim Indonesia
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mathematics Public Health Social Sciences Other

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Journal : Jurnal Scientia

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Olak pool capacity study on ameroro dam overflow building Sukma Ma’ri Fatullah; Ratna Musa; Ali Mallombasi; Mas’ud SAR
Jurnal Scientia Vol. 13 No. 01 (2024): Education, Sosial science and Planning technique, 2024
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/scientia.v13i01.2299

Abstract

Dams, constructed using various materials such as earth fill, stone fill, concrete, and/or stone masonry, serve the primary function of water storage. However, they can also be designed to retain sediment, forming reservoirs. Central to dam infrastructure is the spillway, tasked with regulating water release downstream. This research aims to assess the magnitude of outflow discharge by conducting flood tracing calculations through the spillway and evaluating the effectiveness of stilling ponds in channeling design flood discharge at Ameroro Dam. Employing HEC-RAS for stilling pond modeling, the study reveals that the stilling pond effectively manages flood discharges corresponding to Q100, Q1000, and QPMF events. Analysis using HEC-RAS further indicates that while the stilling pond adequately handles flow conditions during the Q100 return period, it proves ineffective in reducing the flow from the launch channel. Notably, the resulting Froude number of 6.40 signifies supercritical flow, prompting the inclusion of a beacon at the end sill. Consequently, the modified stilling pond configuration reduces flow velocity, transitioning the launch channel flow to subcritical with a Froude value of 0.18.
Study of the addition of overflow doors as flood control (study of ameroro dam case) Anwar Sanusi; Ratna Musa; Ali Mallombasi; Mas’ud SAR
Jurnal Scientia Vol. 13 No. 01 (2024): Education, Sosial science and Planning technique, 2024
Publisher : Sean Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58471/scientia.v13i01.2300

Abstract

Floods are a natural phenomenon that can cause damage to people, property and lives. Floods become a cause for concern when losses are incurred, as rivers usually take up their channel space before they reach human habitation. Floods can be caused by a variety of factors, including the state of the rain-catchment area, the length and intensity of the rainfall, soil cover, topographical conditions and the drainage network's storage capacity. One of the structures that can be used for flood control and prevention is a dam. This study aimed to analyze the return flood discharge and flood tracing through the spillway with the addition of 2 spillway gates at the Ameroro Dam. The study was carried out by analyzing secondary data and primary data obtained through data collection and field surveys. The data analysis stage determines the size of the Design Watershed Hydrograph from the design rainfall calculation using the Snyder Unit Hydrograph method in HEC-HMS 4.11 software. The return period flood discharge in the Ameroro dam for the return period Q 2th = 224.26 m3/s, Q 5th = 270.26 m3/s, Q 10th = 301.73 m3/s, Q 25th = 340.71 m3/s, Q 50th = 369.65 m3 /s, Q 100th = 398.34 m3/s, Q 1000th 493.21 m3/s, and Q PMF = 1222.66 m3/s. When two spillway gates are used to trace floodwaters through the spillway, the outflow discharge is less or the flood is reduced when there are no spillway gates used. Therefore, it is safer for the structure of the dam body and more effective to reduce floods at the Ameroro Dam to use two spillway gates.
Co-Authors Abdul Munir Aldi Sahitua Anwar Sanusi Hanafi Ashad Mas’ud Sar Muhammad Yadi Anugrah Muhlisa Amalia Ilyas Ratna Musa Rusmawati Rusmawati Sukma Ma’ri Fatullah