• Achmad Syarifudin Department of Civil and Environment Engineering,Universitas Bina Darma, Palembang, Indonesia



Design discharge, irrigation channel, HEC-RAS program, Water level


This research was conducted to obtain the right discharge plan in the irrigation area with a study of the amount of discharge that can be used upstream of the weir so that the water supply at the intake does not lack water. The Deras II Irrigation Area covering an area of 928 hectares, has 2 weirs as a source of irrigation water, namely the Moyan weir and Aur Weir. The upstream part of the Moyan weir is a sleeping area in the form of a swamp which farmers use to become a paddy field whose source of water comes from the swift river (upstream Moyan weir). With this water uptake, the impact on the flow of water entering the Moyan intake will be reduced, so it needs to be done with the numerical method approach of the HEC-RAS program. The results of this study are graphically depicted at each review station in the channel and the existing discharge obtained from the measurement of the speed with the current meter and water level from each cross-section along the irrigation channel. The simulation results are obtained with the condition of the river crossing, which is not filled, and the discharge is 0.024 m3/sec. The water level at the downstream cross-section is filled as high as 75 cm with a flow velocity of 0.783 m/sec, and the water level downstream of the irrigation channel is as high as 40 cm.


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F. Aureli and P. Mignosa, "Comparison between experimental and numerical results of 2D flows due to levee-breaking," in Proceedings of the Congress-International Association for Hydraulic Research, 2001, pp. 252–258.

C. Sucipta, H. Wibowo, and D. Gunarto, "Analysis of river geometry on flow discharge in alluvial channels." JeLAST, 2019.

D. Daoed, B. Rusman, B. Istijono, A. Hakam, and M. Syukur, "Evaluation of drought vulnerability on watersheds in West Sumatera Province by using Cropwat-8 and GIS," Int. J. Adv. Sci. Eng. Inf. Technol., vol. 8, no. 6, pp. 2443–2449, 2018.

A. Syarifudin and D. Sartika, "A Scouring Patterns Around Pillars of Sekanak River Bridge," in Journal of Physics: Conference Series, 2019, vol. 1167, no. 1, p. 12019.

M. S. Yalin, Theory of hydraulic models. Macmillan International Higher Education, 1971.

A. K. Chakraborti, "Strategies for Watershed Management planning using remote sensing technique," J. Indian Soc. Remote Sens., vol. 21, no. 2, pp. 87–97, 1993.

C. Poleto and R. Tassi, "Sustainable urban drainage systems," Drain. Syst., pp. 55–72, 2012.

M. Islam, K. Okubo, Y. Muramoto, and H. Morikawa, "Experimental Study on Sedimentation over the Floodplain due to River Embankment Failure," Bull. Disaster Prev. Res. Inst., vol. 44, no. 2, pp. 69–92, 1994.

A. Syarifudin and H. R. Destania, "IDF Curve Patterns for Flood Control of Air Lakitan river of Musi Rawas Regency," in IOP Conference Series: Earth and Environmental Science, 2020, vol. 448, no. 1, p. 12054.

C. Ikhsan, "The effect of variations in flow rate on the bottom of an open channel with uniform flow," Civ. Eng. Media, 2017.

V. Te Chow, Applied hydrology. Tata McGraw-Hill Education, 2010.

G. A. M. S. Adjinacou, "Flood Modeling and Floodplain Mapping Based on Geographical Information System (GIS) and HEC-RAS in Oued Fez Watershed (Morocco)." 2016.




How to Cite

Syarifudin, A. (2022). DETERMINATION OF FLOOD DISCHARGE OF MOYAN WEIR WITH HEC-RAS PROGRAM. Indonesian Journal of Engineering and Science, 3(2), 047–059.