Morphometry Assessment of Oba River Basin and Its Implications for Flood
I. A. Jesuleye *
Cooperative Information Network, National Space Research and Development Agency, Obafemi Awolowo University, Ile-Ife, Nigeria
U. H. Okeke
Cooperative Information Network, National Space Research and Development Agency, Obafemi Awolowo University, Ile-Ife, Nigeria
A. O. Atijosan
Cooperative Information Network, National Space Research and Development Agency, Obafemi Awolowo University, Ile-Ife, Nigeria
R. A. Badru
Cooperative Information Network, National Space Research and Development Agency, Obafemi Awolowo University, Ile-Ife, Nigeria
J. E. Adewoyin
Cooperative Information Network, National Space Research and Development Agency, Obafemi Awolowo University, Ile-Ife, Nigeria
A. T. Alaga
Cooperative Information Network, National Space Research and Development Agency, Obafemi Awolowo University, Ile-Ife, Nigeria
*Author to whom correspondence should be addressed.
Abstract
The morphometric analysis of the drainage basin and channel network plays a vital role for understanding the geo-hydrological behavior of drainage basin and its implication on flood. Besides the primary aim of studying drainage basin as a geographical unit in order to understand its hydrological nature, this study examined the morphometric characteristics of Oba river drainage basin in the South-west of Nigeria with the use of GIS in order to evaluate the implication of the morphometric characteristics on flood potential in the study area. The basin was found to be of 6th order where the total length of streams was 2754.48 km, total number of streams was 2979, basin area and perimeter were 2494.45 km2 and 291 km respectively while the basin length was 96.1km. The detailed morpometry results obtained in the study, to a significant extent, were found to be helpful for determining the tendency for flood events in the watershed.
Keywords: Morphometry, watershed, Oba river basin, remote sensing, Geographic Information System (GIS), flood