• Dr.Dipak Baruah

The Pahumara River is one of the most important northern tributary rivers of the Brahmaputra river. The amount of discharge and impact of flood of this river vary spatio- temporally due to the various determining factors including the release of excess water from neighbouring dams. The frequent disastrous flood impacts of this river are mostly common in the entire Bajali area of Barpeta District of Assam affecting the academic atmosphere, the agrarian economy and existing infrastructural facilities. The ongoing variation and fluctuation in the nature of flood as well as the impact of flood in this area needs proper study and analysis on some aspect pertaining to nature, frequency, probability and magnitude of flooding. The present paper assumes much significance in understanding the fluctuations of discharge and flood estimation of the river Pahumara. The record of annual flood series of the Pahumara river at N. T. road crossing site for the duration of twenty three years (1982 to 2004) has been analyzed to examine the annual discharge fluctuation and probability of flood occurrence using the Gumbel’s Extreme Value Distribution Method. The record of monthly peak discharge for the year 2013, 2019 and 2021 has also been analysed to have the better understanding of varied nature of hydrograph.

Key words: Pahumara, spatio-temporal, probability, magnitude, Extreme.

"“STAGE DISCHARGE HYDROGRAPH AND FLOOD FREQUENCY ANALYSIS OF PAHUMARA RIVER, ASSAM, INDIA”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 10, page no.e238-e245, October-2023, Available :http://www.jetir.org/papers/JETIR2310345.pdf

"“STAGE DISCHARGE HYDROGRAPH AND FLOOD FREQUENCY ANALYSIS OF PAHUMARA RIVER, ASSAM, INDIA”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 10, page no. ppe238-e245, October-2023, Available at : http://www.jetir.org/papers/JETIR2310345.pdf