REGIONAL FLOOD-FREQUENCY ANALYSIS OF OGUN-OSHUN RIVER BASINS
REGIONAL FLOOD-FREQUENCY ANALYSIS OF OGUN-OSHUN RIVER BASINS
No Thumbnail Available
Date
1989-08
Authors
ODUSOTE, ABIMBOLA OLADIPUPO
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
This project describes a procedure for estimating the
design floods from regional frequency curves for ungauged
areas drained by rivers Ogun and Oshun of Western Nigeria.
Streamflow records at nine gauging stations were used for
the study.
For estimating purposes, two relations have been derived.
The first relates graphically the mean annual flood to basin
physiographic factors namely: the size of drainage area and
the length of main channel. The second relates the mean
annual flood to the physiographic factors empirically.
From these, the mean annual floods for a basin is estimated
and used to obtain design flood from a regional flood frequency
quency curve derived for the basin. The regional flood
frequency curve expresses the flood discharge-time relation,
showing variation of peak discharge, expressed as a ratio to
the mean annual flood, with recurrence interval.
Description
A project report submitted to the Postgraduate
School, Ahmadu Bello University, in partial
fulfillment of the requirements for the award of the
degree of Master of Science in Water Resources and
Environmental Engineering.
Department of Water Resources and
Environmental Engineering,
Ahmadu Bello University,
Zaria, Nigeria,
Keywords
REGIONAL,, FLOOD-FREQUENCY,, OGUN-OSHUN RIVER.