Statistical Analysis of Annual Maximum Flows of a Controlled River: A Study on the Kangsabati River, India

By : Sahidul Karim , Soumik Das , Sunil Kumar De

Page No: 234-254

Abstract
This aim of the present work is to analyze the maximum flows of six-gauge sites of the Kangsabati river basin by using Flood Frequency Analysis (FFA) approach. Four probability distribution, namely Log-normal (LN), Gumbel maximum (EV1), Generalized Extreme Value (GEV), and Log Pearson Type 3 (LP3) have been applied. Annual maximum discharge data have been collected from the office of the K.D. Sub-division of Central Water Commission (CWC, India), Medinipur. The logarithmic method of Rating Curve Extension is applied to fill the missing data records. Two goodness-of-fit tests, namely Kolmogorov-Smirnov (KS) and Anderson-Darling (AD), have been used for distributions at 5% significance level. Flow magnitude of 2, 5, 10, 25, 50, and 100-years return periods have been estimated on the basis LP3 distribution. The observed and estimated peak flow magnistude have been recorded highest at the downstream gauge site Mohanpur among the six-gauge sites.

Authors :
Sahidul Karim
Department of Geography, A. B. N. Seal College, Cooch Behar

Soumik Das
Department of Humanities and Social Sciences, Indian Institute of Technology, Kharagpur

Sunil Kumar De
Department of Geography, North-Eastern Hill University, Shillong, Meghalaya.

 

DOI: https://doi.org/10.32381/ATNAGI.2021.41.02.2