Flood Hazard Mapping and 1 D Hydraulic Module for Damanganga River, Valsad district, Gujarat, India

International Journal of Civil Engineering
© 2021 by SSRG - IJCE Journal
Volume 8 Issue 5
Year of Publication : 2021
Authors : Akshay Lad, Prof. Jagruti Shah
How to Cite?

Akshay Lad, Prof. Jagruti Shah, "Flood Hazard Mapping and 1 D Hydraulic Module for Damanganga River, Valsad district, Gujarat, India," SSRG International Journal of Civil Engineering, vol. 8,  no. 5, pp. 45-51, 2021. Crossref, https://doi.org/10.14445/23488352/IJCE-V8I5P105


This research represents the application of Arc GIS and HEC-RAS interface for 1D flood modeling of Damanganga River. Floods are among the most devastating and recurring natural hazard. It caused extensive economic losses and human lives around the word. Damanganga River in south Gujarat is prone to unexpected floods in 1994, 1997, 2001, 2003, 2004, 2006, 2013, 2016 and 2019. This paper presents a model development to determine the water level along the Damanganga River from Arabian Sea using HEC-RAS hydrodynamic model.The first phase for the modeling was done in Arc-GIS environment and function like GEO-referencing, creating Shape file, Mosaic extract by mask, etc. GIS file exported to HEC-RAS. In HEC-RAS RAS Mapper open to create terrain file and generate river center line, bank line, Flow path and cross section cut provide and save geometric data. The second phase for model execute to provide steady / unsteady flow data inserted for the result obtained to show water surface elevationfor peak discharge, need of flood gates on the storm drains are also assessed. The recommendations are done based on this study either to increase height of bank or build a retaining wall at certain section along the study reach.


Damanganga River, Flood Analysis, DEM, Arc-GIS, HEC-RAS, Hydrodynamic modeling, steady / unsteady Flow


[1] Azazkhan I. Pathan, P. G. Agnihotri, 2-D Unsteady Flow Modelling and Inundation Mapping for Lower Region of Purna Basin Using HEC-RAS in 2020. In Nature Environment and Pollution Technology (2020).
[2] Azazkhan I. Pathan, P. G. Agnihotri, A Combined Approach For 1-D Hydrodynamic Flood Modeling by using Arc-Gis, Hec-Georas, Hec-Ras Interface - A Case Study on Purna River of Navsari City, Gujarat in 2019. International Journal of Recent Technology and Engineering (IJRTE) ISSN: 2277-3878, 8(1)(2019).
[3] Muhammad Farooq, Muhammad Shafique, Flood hazard assessment and mapping of River Swat using HEC-RAS 2D model and high-resolution 12-m TanDEM-X DEM (WorldDEM) in natural hazard (2019).
[4] Vinay Ashok Rangari, N. V. Umamahesh, Assessment of inundation risk in urban floods using HEC RAS 2D in Modeling Earth Systems and Environment 5(2019) 1839–1851.
[5] DasallasLea , Kim Yeonsu, Case Study of HEC-RAS 1D–2D Coupling Simulation: 2002 Baeksan Flood event in Krea in water( 2019).
[6] Sumit B. Patel, Darshan J. Mehta, One dimensional hydrodynamic flood modeling for ambica river, south gujarat in 2018 JETIR , 5( 4) ( 2018).
[7] Azhar Husain, Mohammed Sharif, Simulation of Floods in Delhi Segment of River Yamuna Using HEC-RAS. American Journal of Water Resources, 6 ( 4)(2018) 162-168.
[8] Noor SurayaRomali, ZulkifliYusop, Application of hec-ras and arc gis for floodplain mapping in segamat town, malaysia International Journal of GEOMATE,15( 47)( 2018) 7 -13.
[9] Dhruvesh P Patel,Jorge A. Ramirez, Assessment of flood inundation mapping of Surat city by coupled 1D/2D hydrodynamic modeling: a case application of the new HEC-RAS 5 Nat Hazards 89(2017) 93–130.
[10] V. Moya Quirogaa, S. Kurea, K. Udoa& A. Manoa, Application of 2D numerical simulation for the analysis of the February 2014 Bolivian Amazonia flood: Application of the new HEC-RAS version 5. Ribagua, 3:1, 25-33, DOI: 10.1016/j.riba.2015.12.001.
[11] HeenaIngale, R. V. Shetkar, Flood Analysis of Wainganga River by using HEC-RAS model International Journal of Scientific Engineering and Technology., 6( 7)(2017) 211-215.
[12] Rahul Agrawal, Regulwar D.G. Flood Analysis of Dhudhana River in Upper Godavari Basin Using HEC-RAS. International Journal of Engineering Research., 5( 1)( 2016) 188-191.
[13] Vahdettin Demir & Ozgur Kisi, Flood Hazard Mapping by Using Geographic Information System and Hydraulic Model: Mert River, Samsun, Turkey Hindawi Publishing Corporation Advances in Meteorology., (2016) Article ID 4891015.
[14] Darshan j mehta, Manthan Ramani, application of 1D HEC-RAS model in design of channels (IJIRAE)., 1( 7) ( 2014).
[15] Dhruvesh P. Patel, Prasant K. Srivastava, Flood Hazards Mitigation Analysis Using Remote Sensing and GIS: correspondence with town planning scheme Water Resources Management.,(2013)DOI: 10.1007/s11269-013-0291-6
[16] P. V. Timbadiya, P. L. Patel, Hec-ras based hydrodynamic model in Prediction of stages of lower tapi river ISH Journal of Hydraulic Engineering (2012).
[17] P.G. Agnihotri, Patel J.N. Improving carrying capacity of river tapi (surat, india) by channel modification. International Journal of Advanced Engineering Technology E-ISSN 0976-3945.
[18] Jie Yang, Ronald D. Townsend. Applying the HEC-RAS model and GIS techniques in river network floodplain delineation. Can. J. Civ. Eng., 33(2006).
[19] M.R. Knebl, Z.-L. Yang, Regional scale flood modelling using NEXRAD rainfall, GIS, and HEC-HMS/RAS: a case study for the San Antonio River Basin Summer 2002 storm event.Journal of Environmental Management., 75 (2005) 325–336.
[20] Muhammad ShahzadKhattak, Faizan Anwar, Floodplain Mapping Using HEC-RAS and ArcGIS: A Case Study of Kabul River. Arab J SciEng 41 (2016)1375–1390. DOI 10.1007/s13369-015-1915-3.
[21] HEC-RAS river analysis system, Hydraulics reference manual, version 5.0, (2016)., U S Army corps of engineers.
[22] Vapi development plan( 2016 – 2020) report.
[23] Patel CG, Gundaliya PJ Floodplain delineation using HECRAS, model—a Case Study of Surat City. Open J Mod Hydrol 6(01) (2016) 34.
[24] Remo JW, Carlson M, Pinter N Hydraulic and flood-loss modeling of levee, floodplain, and river management strategies,
Middle Mississippi River, USA. Nat Hazards 61(2) (2012) 551–575.