Performance-Assessment of Existing Drainage Facilities for The Purpose of Stormwater Management
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Date
2020-03
Journal Title
Journal ISSN
Volume Title
Publisher
LAUTECH Journal of Civil and Environmental Studies
Abstract
The study assesses the performance of the existing drainage facilities in some selected areas in
Ilorin Metropolis of Kwara State, Nigeria. The rapid increase in urbanization, increase in
population without corresponding infrastructures in the city of Ilorin have led to the increased
incidence of flood as the available drainage channel cannot convey the volume of water. The study
focuses on the household demograph, flooding, drainage maintenance and solid waste management
strategies employed in the study areas. The methodology involves the use of questionnaires and
interview method to gather information from the respondents of the study areas. The study was
carried out with 200 copies of well-designed questionnaire through systematic random sampling
technique in the administration. The research questions were answered using tables of frequencies
and percentages, bar chat, pie chart and regression analysis for flood modelling and prediction of
flood occurrence. The analysis revealed that frequent flood events in the city of Ilorin can be traced
to dumping of solidwaste in the drainage system, inadequate drainage channels, poor solid waste
management strategy and variables such frequency of drainage maintenance, predominant waste
material and duration of drainage maintenance, made statistically significant contributions to the
prediction of Flood occurrence. A model for prediction of effect of stormwater management on flood
was formulated. All the variables used in the model were evaluated and it has been established that
frequency of drainage maintenance makes the strongest contribution to the causes of flood (Y
dependent variable) among all other significant variables, other significant variables included
availability of drainage system, waste disposal mechanism, distance of available dumpsite,
frequency of waste collection, agency responsible for drainage maintenance and predominant waste
materials.
Description
Keywords
Assessment, Drainage facilities, Stormwater, Flood, Management
Citation
Oluwaseun, O. V., Bilewu, S. O. Adejumo, E.A and Makanjuola, B.G.(2020). Performance-Assessment of Existing Drainage Facilities for The Purpose of Stormwater Management. LAUTECH Journal of Civil and Environmental Studies. 4(1). 107-122