Modelling and Estimation of the Rainfall Intensity and Flood Management in Efab-Estate, Abuja

Abstract

Dimensional analysis technique was used to develop model
equations that was applied for re designing of an existing drainage
for management of flood at Efab- Estate, Lokogoma FCT-Abuja.
Data comprising (41) years of monthly rainfall for Lokogoma was
analyzed for return periods and rainfall intensities. The analyzed
data estimated a 166.5mm/hr rainfall intensity. The hydraulic design
of rectangular open channel presented optimal hydraulic area of
0.39m2 when compared to the existing rectangular channel which
has hydraulic area of 0.3m2
. The existing channel is smaller, this is
an indication of the inadequacy of the existing channel to convey
storm water safely from the estate without overflowing