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Krishna River Downstream Temporal Channel Variations
savitribai phule pune universiy

Corresponding Author:das.sumeli@gmail.com

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All rivers undergo changes in channel geometry downstream systematically. A river adjusts its channel geometry (width,depth,cross-sectional area)within the limitations imposed by discharge, channel lithology. As not much studies on channel geometry on large monsoon-fed rivers. Therefore, in this study an attempt will be made to understand the fluvial geomorphological characteristics and variation for 2 decades of major Indian Peninsular River namely Krishna, in terms of channel geometry, discharge. Present study focusses on channel geometry changes downstream for a large Peninsular River . The Krishna River is the third largest river in India.Cross-sectional data for a downstream gauging sites during 1990-2010is downloaded from India Water Resources Information System (India-WRIS) WebGIS. portal. Channel Geometry parameters in terms of Channel Cross-Section Area,Width,Depth,Wetted Perimeter,Hydraulic Radius,Form Ratio are derived from the data involving 9 sites on main river. The Graphs indicate as the maximum discharge increases with corresponding increase in Cross-Sectional Area,Width,Depth,Wetted Perimeter,Form Ratio,Velocity,Hydraiulic Radius is observed with corresponding decrease in Mean Velocity downstream.Channel forms upstream to downstream becomes less steep.APower-log regression equation carried out to evaluate the level of confidence between the parameters.