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
Azazkhan I. Pathan1, P. G Agnihotri2
1Azazkhan I. Pathan, PhD Research Scholar at Civil Engineering Department, S V National Institute of Technology, Surat, India.
2Dr. P.G Agnihotri, Professor at Civil Engineering, S V National Institute of Technology, Surat, India.

Manuscript received on 08 April 2019 | Revised Manuscript received on 14 May 2019 | Manuscript published on 30 May 2019 | PP: 1410-1417 | Volume-8 Issue-1, May 2019 | Retrieval Number: A3260058119 /19©BEIESP
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: This research work represents the application of ArcGIS, HEC-RAS and HEC-GeoRAS interface for 1-D flood modeling of Purna River. The research expectation is to disaster authorities and organizers in the advancement of flood control actions for the Purna River, which experience unexpected floods in 1976, 1977 and 2004, resulting in loss of life and property in the surrounding region. Due to free availability and good accuracy, Digital Elevation Model (DEM) was preferred from open sources, for the extraction of geometrical data for the river. Research represent methodology of combined application of Arc-GIS and HEC-RAS. The first phase for modeling was done in Arc-GIS environment and functions like Geo-referencing, creating Shapefile, Mosaic, extract by mask, etc., were done. From the first phase, geometric parameters like river centerline, bank line, flow path lines, cross section cut lines were extracted into a data file with HEC-GeoRAS extension provided in Arc-GIS. This geometric data file is exported from Arc-GIS to HEC-RAS environment for model execution. The Second phase for model execution is done in HEC-RAS environment to which the geometry data were imported to generate a HEC-RAS model. Results obtained from the HEC-RAS model show the water surface elevation for peak discharge, the cross-section details at various points along the length of the river and certain cross-sections at specific points along the length of the river which experience flooding due to high discharge during monsoon season are shown. Through this approach, research application can be used at Purna River near Navsari district, so that we can identified the cross-sections where flooding phenomenon is prominent and contain the flood within the river by providing embankments, flood wall, etc.
Index Terms: DEM, Arc-GIS, HEC-RAS, HEC-Geo RAS, Hydrodynamic Modeling, Flood

Scope of the Article: Artificial Intelligence Approaches to Software Engineering