Prioritization, Characterization and Geo-spatial Location of River Training Structures for Vrishabhavathi River using GIS Techniques

Bengaluru drainage characteristics of natural catchments have drastically altered due to unplanned urbanization, increasing volume and rate of surface runoff. The frequent blockage of drainage system due to indiscriminate disposal of solid waste, encroachment of wetlands and increasing volume of flow makes coping up and worsening the present drainage systems. These problems of urban floods can be prevented by taking necessary precautions in places where these urban floods could occur. Remote sensing and geographical information system plays a major role in recognizing the flood prone area. Using Arc-GIS software and Google Earth images, critical bed characteristics are identified. In order to analyse physico-chemical characteristics of ground water along the banks of the river, eight water samples were collected and tested. A temporal analysis on surface water of Vrishabhavathi reservoir was made. The geo-spatial location of varying ground water quality and flood prone areas was identified by weighted overlay analysis through GIS application. Bad river bed characteristics, poor ground water quality, flood prone areas and variation in surface water quality were identified in the study. This work is concluded by suggesting corrective measures that can be carried out in these identified locations to avoid urban floods. Keywords: GIS, river bed characteristics, physico-chemical characteristics, ground water quality, river training, geo-spatial location, flood prone areas Cite this Article Gajalakshmi K, Joshi Ashwin M, Sneha AR. Prioritization, Characterization and Geo-spatial Location of River Training Structures for Vrishabhavathi River using GIS Techniques. Journal of Remote Sensing & GIS . 2017; 8(3): 33–45p.