Flood Flow Modelling and Embankment Protection of Mahanadi River using HEC-RAS

Dhiman Kumar*, Vinod Kumar Tripathi**, Prabeer Kumar Parhi***
* Senior Research Fellow, ICAR-Indian Institute of Water Management, Bhuabaneswar, Odisha, India.
** Assistant Professor, Department of Farm Engineering, Institute of Agricultural Science, IIT-BHU, Varanasi, Uttar Pradesh, India.
*** Assistant Professor, Centre for Water Engineering and Management, Central University of Jharkhand, Ranchi, Jharkhand, India.
Periodicity:May - July'2018
DOI : https://doi.org/10.26634/jfet.13.4.14470


India has such a diverse geographical area that there are floods in some parts and droughts in other parts of the country and same time they co-exist. Large numbers of severe and devastating floods are endangering life and properties. In the state of Odisha, flooding is caused primarily due to Mahanadi River. The flow of water and its level in the river Mahanadi having a catchment area 141000 km2 is controlled by Hirakud dam. The entire deltaic region of Mahanadi River intercepting a catchment of 48700 km2 gets affected by medium to severe flood almost every year causing immense loss to life and property. Study was done to find out reduced level of flood water in different locations of Mahanadi river reach between Hirakud dam and Naraj for 10, 25, 50, and 100 years return period using Hydrologic Engineering Center-River Analysis System (HEC-RAS) model. The study has been accomplished by preparing the basin map for Mahanadi river in HEC-RAS readable format and computing the peak flood for 10 years, 25 years, 50 years, and 100 years return period using Gumbel's distribution. Improvements for the channel cross-section, bank embankment modification, height of flood protection structure such as dikes, levees in the flooded zone were suggested. The peak flood discharge of Mahanadi river at 10 years, 25 years, 50 years, 100 years return have been calculated as 37535.026 m3/s, 45067.19m3/s, 50656.19 m3/s, and 56203.24 m3/s, respectively. Flood flow hydrograph has been prepared for the year 2008 by unsteady flood flow simulation. Around 10 marked location of river stations are prone to flood under 20 year return period. Eight such points were observed to be overtopping the existing banks with a varying height of 1 m to 10 m with reference to existing banks reduced level in subsequent 10 years to 100 years return period in increasing order. The findings of present study suggest the minimum height of dikes, levees to provide protection from flood at different locations of existing banks to be 2 m to 10 m.


Flood Modelling, Hydrologic Engineering Center-River Analysis System (HEC-RAS),Gumbel's Method, Flood Hazard, Mahanadi River

How to Cite this Article?

Kumar, D., Tripathi, V. K., & Parhi, P. K. (2018). Flood Flow Modelling and Embankment Protection of Mahanadi River Using HEC-RAS. i-manager’s Journal on Future Engineering and Technology, 13(4), 1-13. https://doi.org/10.26634/jfet.13.4.14470


[1]. Asia’s Disaster Toll. (2013). Climate Change in Asia [Websites]. Konrad-Adenauer-Stiftung Media Programme Asia. Retrieved from http://ejap.org/environmental-issues-in- asia/natural-disasters-asia.html
[2]. Choudhury, P., Sandbhor, J., & Satapathy, P. (2012, August). Floods, fields and factories: Towards Resolving Conflicts around the Hirakud Dam. Forum for Policy Dialogue on Water Conflicts in India.
[3]. D'Oria, M., Mignosa, P., & Tanda, M. G. (2013). Bayesian estimation of inflow hydrographs in ungauged sites of multiple reach systems. Advances in Water Resources, 63, 143-151.
[4]. Dilley, M., Chen, R. S., Deichmann, U., Lerner-Lam, A. L., & Arnold, M. (2005). Natural Disaster Hotspots: A Global Risk Analysis. The World Bank.
[5]. Fritz, et al. (2003). Harmonising, Mosaicing and Production of the Global Land Cover 2000 Database. Brussels: European Commission.
[6]. Ghanbarpour, M. R., Saravi, M. M., & Salimi, S. (2014). Floodplain inundation analysis combined with contingent valuation: Implications for sustainable flood risk management. Water Resources Management, 28(9), 2491-2505.
[7]. Jena, P. P., Chatterjee, C., Pradhan, G., & Mishra, A. (2014). Are recent frequent high floods in Mahanadi basin in eastern India due to increase in extreme rainfalls? Journal of Hydrology, 517, 847-862.
[8]. Jonkman, S. N. (2005). Global perspectives on loss of human life caused by floods. Natural Hazards, 34(2), 151- 175.
[9]. Kumar, D. N., Baliarsingh, F., & Raju, K. S. (2011). Extended Muskingum method for flood routing. Journal of Hydro-environment Research, 5(2), 127-135.
[10]. Mahanad: Basin. (2014). Ministry of Water Resources, Government of India. Retrieved from http://india-wris.nrsc.gov.in/Publications/BasinReports/ Mahanadi%20Basin.pdf
[11]. Mosquera-Machado, S., & Ahmad, S. (2006). Flood hazard assessment of Atrato river in Colombia. Water Resources Management, 21(3), 591-609.
[12]. Mouri, G., Minoshima, D., Golosov, V., Chalov, S., Seto, S., Yoshimura, K., ... & Oki, T. (2013). Probability assessment of flood and sediment disasters in Japan using the Total Runoff-Integrating Pathways model. International Journal of Disaster Risk Reduction, 3, 31-43.
[13]. National Disaster Management Guidelines- Management of Floods. (2009). Retrieved from https://ndma.gov.in/images/guidelines/flood.pdf
[14]. Panda, D. K., Kumar, A., Ghosh, S., & Mohanty, R. K. (2013). Streamflow trends in the Mahanadi River basin (India): Linkages to tropical climate variability. Journal of Hydrology, 495, 135-149.
[15]. Pappenberger, F., Beven, K., Horritt, M., & Blazkova, S. (2005). Uncertainty in the calibration of effective roughness parameters in HEC-RAS using inundation and downstream level observations. Journal of Hydrology, 302(1-4), 46-69.
[16]. Pappenberger, F., Matgen, P., Beven, K. J., Henry, J. B., & Pfister, L. (2006). Influence of uncertain boundary conditions and model structure on flood inundation predictions. Advances in Water Resources, 29(10), 1430- 1449.
[17]. Parhi, P. K. (2012). HEC-RAS model for Mannnig's Roughness: A case study. Open Journal of Modern Hydrology, 3(3), 97-101.
[18]. Parhi, P. K., Sankhua, R. N., & Roy, G. P. (2012). Calibration of channel roughness for Mahanadi River, (India) using HEC-RAS model. Journal of Water Resource and Protection, 4(10), 847-850.
[19]. Report of Working Group on Flood Management and Regional Specific issues for XII plan, Planning Commission India, 2011.
[20]. Sapir, G., D. (2011). Annual Disaster Statistical Review 2010. Centre for Research on the Epidemiology of Disasters.
[21]. Song, S., Schmalz, B., & Fohrer, N. (2014). Simulation and comparison of stream power in-channel and on the floodplain in a German lowland area. Journal of Hydrology and Hydromechanics, 62(2), 133-144.
[22]. The Indian Express. (2014). Odisha floods kill 34, affect nearly 10 lakh people. Retrieved from http://indian express.com/article/india/india-others/odisha-floods-kill- 34-affect-nearly-10-lakh-people
[23]. Timbadiya, P. V., Patel, P. L., & Porey, P. D. (2011). Calibration of HEC-RAS model on prediction of flood for lower Tapi River, India. Journal of Water Resource and Protection, 3(11), 805-811.

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