Table of Contents
Geography Journal
Volume 2013 (2013), Article ID 214140, 11 pages
http://dx.doi.org/10.1155/2013/214140
Research Article

Estimation of Peak Flood Discharge for an Ungauged River: A Case Study of the Kunur River, West Bengal

1University of Kalyani, Nadia, West Bengal 741235, India
2The University of Burdwan, Burdwan, West Bengal 713101, India

Received 10 September 2013; Revised 21 October 2013; Accepted 29 October 2013

Academic Editor: Achim A. Beylich

Copyright © 2013 Suvendu Roy and Biswaranjan Mistri. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Due to unavailability of sufficient discharge data for many rivers, hydrologists have used indirect methods for deriving flood discharge amount, that is, application of channel geometry and hydrological models, for the estimation of peak discharge in the selected ungauged river basin(s) in their research/project works. This paper has studied the estimation of peak flood discharge of the Kunur River Basin, a major tributary of the Ajay River in the lower Gangetic plain. To achieve this objective, field measurements, GIS technique, and several channel geometry equations are adopted. Three important geomorphic based hydrological models—manning’s equation, kinematic wave parameter (KWP), and SCS curve number (CN) method—have been used for computing peak discharge during the flood season, based on daily rainfall data of September, 2000. Peak discharges, calculated by different given models, are 239.44 m3/s, 204.08 m3/s, and 146.52 m3/s, respectively. The hydrograph has demonstrated the sudden increase with heavy rainfall from the 18th to the 22nd of September, 2000. As a result, a havoc flood condition was generated in the confluence zone of Ajay and Kunur Rivers. This hydrograph might be not only successful application for flood forecasting but also for management of the lower Ajay River Basin as well as the downstream area of Kunur Basin.