An Interpretation of Reversed Flow Curve In Hec-RAS 2D Time Based Cross Section

Authors

  • Bambang Eko Widyanto Civil Engineering Program Study, Faculty of Engineering, Widyatama University, Bandung, Indonesia Author
  • Sandy Radhitya Akbar Civil Engineering Program Study, Faculty of Engineering, Widyatama University, Bandung, Indonesia Author
  • Fuad Hasan Civil Engineering Program Study, Faculty of Engineering, Widyatama University, Bandung, Indonesia Author

DOI:

https://doi.org/10.61841/epcag091

Keywords:

HEC-RAS, Flood, Discharge

Abstract

 Modelling software is important nowadays, especially in a country which troubled with a flood. Flood can be happened from various cautions from the Dam failure, heavy rain, tidal and etc. HEC RAS is one of modelling software that often used by an engineer to create a flood model. It even can calculate an unsteady flow in 2D simulation and use a discharge calculation as an initial boundary data and use a Digital Elevation Model as flow areas. The modelling results is a flood plain area, a flow in cross section area, velocity and etc. Some of flow results that shown in graphic area is reversed and sometime make a miss interpretation. The reversed graphic is caused by negative value of Velocity which is a part of flow equation. Based the velocity equation the possible negative value is come from the Slope value which can be read negative by the system. To interpret it, we need to see how the long section is and change the value to positif. 

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References

[1] .., HEC-RAS River Analysis System 2D Modeling User’s Manual. US Army Coprs Of engineers.2018

[2] Casulli.2008. A high-resolution weeting and drying algorithm for free-surface hydrodynamics. Int. J. Numer. Meth.

Fluids. 2008

[3] Widyanto, B. E., Agustian, Y., Sidiq, R. A., & Hasan, F. (2019). The Effect of Land Use Towards the increasing

number of Reynold and Sediment’s Transport Distribution in Cikapundung River. International Journal of

Advanced Science and Technology, 28(6), 31 - 35

[4] Yen, B.C., Tsai, C.W.-S. 2000. On Non Inertia Wave Versus Diffusion Wave In Flood Routing. Journal Of

Hydrology, 244 (2001) 97-104

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Published

29.02.2020

Issue

Vol. 24 No. 1 (2020): 24 (1) 2020

Section

Articles

License

Copyright (c) 2020 AUTHOR

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How to Cite

Eko Widyanto, B., Radhitya Akbar, S., & Hasan, F. (2020). An Interpretation of Reversed Flow Curve In Hec-RAS 2D Time Based Cross Section. International Journal of Psychosocial Rehabilitation, 24(1), 4397-4404. https://doi.org/10.61841/epcag091