Comparison of Water Level of Natural and Modified Section of Vishwamitri River using HEC-RAS

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
© 2017 by IJETT Journal
Volume-47 Number-6
Year of Publication : 2017
Authors : C.V.Padalia, T.A.Raval, F.P.Parekh, T.M.V.Suryanarayana
DOI :  10.14445/22315381/IJETT-V47P253


C.V.Padalia, T.A.Raval, F.P.Parekh, T.M.V.Suryanarayana "Comparison of Water Level of Natural and Modified Section of Vishwamitri River using HEC-RAS", International Journal of Engineering Trends and Technology (IJETT), V47(6),329-335 May 2017. ISSN:2231-5381. published by seventh sense research group

The flood coming within the city has many primary effect such as loss of life, damage to buildings and other structures, including bridges, sewerage systems, roadways, and canals. As a result of which the study of flood for the river passing through the city is very important and so the study area of the present study is as follows. The study area includes Vishwamitri River, which is been located within the heart of the Vadodara city. The specific area to be studied of the Vishwamitri River is from chainage 15200 metre to 0 metre starting from NH-8 Crossing beyond Atladra Bridge. The objective of the study is to analyse the water surface elevation of natural river reach and then modifying the natural river reach cross-section into trapezoidal cross-section for 805 cumecs discharge, which was maximum flood observed by Vadodara city in 2005. After modifying the natural river reach section to trapezoidal section its maximum discharge carrying capacity is been found out and all this analysis and modification is done using the software HEC-RAS. Then by using Gumble’s method flood frequency analysis is done to find the flood of specific return period for which modified river reach is safe. For maximum discharge carrying capacity of trapezoidal section and For maximum flood of 805 cumecs discharge observed by Vadodara city, Clearance between bottom of deck and water surface elevation available at all the bridges within the reach is been analysed for natural as well as modified trapezoidal section.


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Water level, flood, cross-section, river reach and HEC-RAS.