Purnama, N. and Jayadi, R. and Istiarto, Istiarto (2021) Dam break analysis using 1D geometry at Jatigede Dam, Sumedang. In: ICWRDEP 2021.
Purnama_2021_IOP_Conf._Ser.__Earth_Environ._Sci._930_012088.pdf
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Abstract
Dam breaks can result in flash floods which have enormous destructive power. This destructive force becomes even more significant when the dam break occurs in a dam with a large capacity. An example is the Jatigede Dam, which has a capacity of 1,060 million m3. To determine the flash flood characteristics and potential impact of the collapse of the Jatigede Dam, an analysis of the dam break was carried out using HEC-RAS software. The dam break scenario uses a Probable Maximum Flood (PMF) inflow with the partial opening of two spillway gates in the middle, which causes the dam overtopping. The Froehlich and Von Thun, and Gillette regression methods were used to defining the breach parameters. Based on the dam break analysis, the simulated flash flood of the Von Thun-Gillette method resulted in a higher velocity and lower water surface elevation than the Froehlich method. The difference in the velocity, dimension of the breach shape, water surface elevation, and discharge is caused by the breaching shape and breach formation time.
Item Type: | Conference or Workshop Item (Paper) |
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Additional Information: | Library Dosen |
Uncontrolled Keywords: | Dam break, flash flood, dam overtopping, breach parameters, breaching shape |
Subjects: | T Technology > TA Engineering (General). Civil engineering (General) T Technology > TA Engineering (General). Civil engineering (General) > Environmental engineering |
Divisions: | Faculty of Engineering > Civil Engineering & The Enviromental Department |
Depositing User: | Sri JUNANDI |
Date Deposited: | 18 Sep 2024 02:35 |
Last Modified: | 18 Sep 2024 02:35 |
URI: | https://ir.lib.ugm.ac.id/id/eprint/4949 |