No 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 6 th order where the total length of streams was 2754.48 km, total number of streams was 2979, basin area and perimeter were 2494.45 km 2 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.

Nigeria's economy is heavily dependent on the oil sector and this has led to neglect of the agricultural sector in the past. To diversify the economy is of paramount necessity in order to drift the economy from total dependence on the oil sector. In order to help in the reversal of this wholly dependence on the oil sector, the government has been advocating to shift attention to other key sectors of the economy and particularly agriculture. The government has initiated cassava production and exportation, this seeks to variegate the use of Nigerian-produced cassava through industrial processing and utilization options. This aims at giving domestic and exporters the opportunity to generate income for the government and individuals. To get the goal achieved, improved varieties of cassava have been made available for higher yields. In this study, GIS has been used to bring biophysical factors such as rainfall, temperature, sunshine hours, soil, soil slop, elevation and geology together; using Boolean in spatial analyst tools in ArcGIS 10.1 software to ascertain the most suitable area for cassava production in Akoko-Edo L.G.A. of Edo state. The most suitable area is highlighted for large scale cassava production for industries and prospective investors.