Modeling of the Hydraulic Characteristics of Owerri Urban Storm Water in Nigeria
This study was carried out by conducting the modeling of the hydraulic characteristics of the urban storm water of Owerri metropolis, Imo State. The parameters analyzed include Discharge, Area of drainages, Wetted perimeter, Velocity, Inlet and Outlet elevations of drains, sum total of channel length, Drainage density, Rainfall, Basin area, Impervious of the area and Gradient. A power regression model was developed ; Y = 0.109469 * x10.033068 *x2─1.05366 * x30.173452 * x40.689028 * x55.296624 * x60.072382, and the modeled results are [2.2920, 2.6709, 3.8919, 4.0642, 3.9051, 5.3527, 5.7628, 3.1398, 2.9155(m3/s)], which when compared with the field results, their respective differences ranges from -0.2745 to +0.3020. The variations between the modeled results and field results are all within an acceptable limits of ± 5% to 30%, with a Standard Estimation Error (SEE) of 0.4783 and coefficient of determination (R2) of 0.966.
Storm Water, Drainage Density, Owerri and Drainage Systems
Garg S. K., 2011. Hydrological and Water Resources Engineering, Water Resources Engineering (Vol 1), Hydrograph of Direct Runoff, Pg 120-251.
http://Population of Owerri,.mht,25/09/2014,03:47PM.
Imo State Ministry of Lands and Survey, 1977-1780, Storm Water Drainage Map.
Majidi, A and Shahedi, K 2012, Simulation of Rainfall-Run off Process Using Green-Ampt Method and HEC-HMS Model, Iran, International Journal of Hydraulic Engineering, 1(1):5-9.
Mulligan, M. and Wainwright, J., 2003. Modelling and model building. In: Environmental Modelling: Finding Simplicity in Complexity, J. Wainwright &M. Mulligan (Eds.). John Wiley and Sons, Chichester, Pg 7-73.
New Jersey Storm Water Best Management Practices Manual, 2004, Computing storm water runoff rates and volumes, Pg 1-4.
Suresh. R., 2006. Soil and Water Conservation Engineering, Rainfall and Runoff Relationship. Standard Publishers Distributors, Pg 25.
Traore, V. B., Sambou, S., Tamba, S., Fall, S., Diaw, A. T., and Cisse, M. T., 2014, Calibrating the rainfall runoff model GR4J and GR2M on the Koulountou river basin, Senegal, American Journal of Environmental Protection, 3(1):36-44.
Urban Storm Drainage Criteria Manual, 2001. Urban Drainage and Flood Control District, Volume 1. Denver, Pg 6.
Urbonas Ben, 2007. Engineering Conferences International Conference on Urban Runoff Modeling. Intelligent Modeling to Improve Storm water Management, Humboldt State Univ, Arcata. Pg 1.
Wang C, Wan T. R, and Palmer, I. J., 2007. A real-time dynamic simulation scheme for large scale flood hazard using 3D real world data. 11th International Conference Information Visualization (IV'07), IEEE Xplore, Pg 607-612.