Abstract
The Diyung river descends in Nagaon district of Assam. After its confluence with main channel Kopili it causes enormous losses to life and property due to floods. Appropriate watershed treatment measures are, therefore, required for moderating the flood damage. In the present study landscape information viz., the hypsometric integral has been analysed. The Diyung watershed has been subdivided into 23 sub-watersheds for hypsometric analysis. The hypsometric integral for the entire Diyung watershed ranged from 0.14 to 0.56. According to the present study there are two stages of geologic/geomorphologic development, namely equilibrium stage and monadnock stage. The hypsometric integral indicates that surface runoff is the dominant process. Although static, the topographic characteristics indicate response of watershed to various natural phenomenon and dominant processes such as runoff and erosion. Based on the intensity of the processes sub-watershed can be prioritized for taking up appropriate conservation measures. The study also highlights the use of hypsometric integral for prioritizing watershed for planning engineering measures to mitigate the impact.
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Kusre, B.C. Hypsometric analysis and watershed management of Diyung watershed in north eastern India. J Geol Soc India 82, 262–270 (2013). https://doi.org/10.1007/s12594-013-0148-x
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DOI: https://doi.org/10.1007/s12594-013-0148-x