Study of Drainage Characteristics and its Implications for Watershed Management—A Case Study of the Dharma River Basin, Karnataka State, India

Umesh J Madolli, Jagadish T Gudagur, MALLAPPA J. MADOLLI


The present study is carried out to understand the hydro-geological process over the Dharma watershed by using drainage network characteristics and morphometric analysis. Aster DEM, NBSS & LUP soil data has been used in the present study. Morphometric parameters were estimated by using standard methods and Arc hydro extension tool of ArcGIS is used for the morphometric analysis. Fourth stream order basins from five sub-basin in the Dharma watershed were selected to understand the drainage characteristics. Results reveal that, watershed has elongated shape, gentle slope, low stream frequency, very low drainage density and coarse drainage texture. Morphometric parameters of Dharma watershed indicate that produced surface runoff requires longer duration to achieve the peak rate and runoff has lower peak. Further, study results reveal that Dharma watershed is less prone to soil erosion and flood hazards.


Dharma watershed, drainage characteristics, morphometric analysis, geomorphology


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