Volume : V, Issue : XII, December - 2016

Flood Hazard Mapping of Karuvannur river basin of Kerala, India

Drissia T K, Binny C P, Anitha A B

Abstract :

 Frequent occurrence of floods causes destruction to life and property. Flood hazard maps are created for identifying the flood prone area. Morphometry based flood hazard zone delineation is an indirect method. In this study morphometry based flood hazard zone was identified in Karuvannur river basin of Kerala using geographic Information System (GIS). ?e riverbasin was divided into five subbasins according to the location of the stream gauge stations. ?e morphometric parameters are divided into two groups as to how they affect floods. ?e group I include morphometric parameters like basin area (A), drainage number (Nu), total stream length (Lu), drainage density (Dd), stream frequency (Fs), circulatory ratio (Rc), basin slope (Bh) which are directly proportional to flood. Group II includes elongation ratio (Re), mean bifurcation ratio (Rb), infiltration number (If), and Ruggedness Coefficient (Rn) which are inversely proportional to flood. ?e summation of the parameters in each group after normalization divides this area into five groups of flood zones; very high risk, high risk, medium risk, low and very low risk area. ?e study reveals that about 6.75% of area is prone to high flood risk and 57.28% medium flood risk. ?is study will help in the planning of flood management

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Drissia T K, Binny C P, Anitha A B, Flood Hazard Mapping of Karuvannur river basin of Kerala, India, International Journal of Scientific Research, Volume : 5 | Issue : 12 |December 2016

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