Browsing by Author "Bilewu, S.O"
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Item Assessment of Existing Drainage Facilities with an Intensity Duration-Frequency Curve for the Purpose of Storm Water Management in Ilorin Metropolis(Journal of Research Information in Civil Engineering, 2020) Oluwaseun, O.V; Iji, J.O; Bilewu, S.ODrainage channels are critical facilities necessary for the conduit and proper transportation of surface run off, with its effectiveness comes storm water management, this is because without the drains the water can become a major hazard as flooding instead of a blessing inform of rainfall precipitation. This study has evaluated the existing drainage facilities in Ilorin metropolis for the purpose of storm water management. The approach used are; preliminary data collection, reconnaissance survey, field work and data computation. This was followed by a desk study of fall data to produce an IDF curve, analysis of the drains based on the intensities obtained and report writing. Results obtained revealed that most of the existing drainage facilities in Ilorin metropolis were functioning below capacity hydraulically, in terms of discharge, area and velocity. And this makes the surrounding environment prone to flooding. Area and velocity are two of the most seriously affected hydraulic parameter in the study area with percentage difference of 10% in most study area.Item Characterization of Solid Waste Generated on the University of Ilorin Campus and Recycling of the Paper Content.(Journal of Research Information in Civil Engineering, 2019) Bilewu, S.O; Oluwaseun, O.VThis work presents the characterization of solid waste generated on the university of Ilorin main campus and recycling of the paper content with faculty of Engineering and Technology buildings as a case study. A total of 91.7kg of waste was sampled and characterized and it was concluded that various types of waste generated are: Cardboard/carton, Nylon, PET bottles, Paper, Wood, Food waste, Aluminum can, Yard waste, Glass bottle, Packaging wraps, Computer hardware, Metal scraps, Laboratory waste such as hardened soil samples, bamboo stalks, Lead acid accumulator, and ink cartridge. The most prominent ones among these waste components was found to be the Miscellaneous with a percentage component of 29.85. Miscellaneous comprises of photocopier parts, broken crates, ink cartridge and laboratory wastes. Cardboard/carton seconded with a total percentage of 20.55% while Wood was the third largest with a percentage of 12.88%. Others include: Food waste, 6.58%; PET bottles,5.68%; glass bottles, 5.92%; yard waste, 4.26% aluminum cans,3.11%; nylon,2.0%; paper, 2.88%; yard waste, 2.28%. packaging wraps with a percentage composition of 1.11% was the least. Finally, some of the waste paper were recovered and recycled.Item Delineation of Groundwater Potential Zones in Awun Basin and Its Environs Using Remote Sensing and GIS Techniques(Nigeria Association of Hydrological Sciences (NAHS), 2017) Ayanshola, A.M.; Jimoh, M.O.; Bilewu, S.O; Kolade, S.A.; Salami, A.W.; Aremu, A.S.An integrated approach using remote sensing and Geographic Information Systems (GIS) was adopted to assess the groundwater potential in the Awun basin and its environs in Kwara State, Nigeria. Digitally enhanced colour composites and panchromatic images of Landsat TM were interpreted to produce thematic maps of the study area. Topographic parameters were derived from digital elevation models and used to map landforms. Fracture patterns and spacing were measured in the field in different rock types and compared with lineaments. All thematic layers were integrated and analysed and a groundwater potential map was generated. The spatial distribution of groundwater potential zones showed regional patterns related to lithologies, lineaments, drainage systems and landforms. Results showed that spatial distribution of the most promising sites for groundwater exploration was dependent on the interrelated factors of lithology, topography and geologic structure. The most promising sites were distributed in 56% of the study area. The results demonstrate that the integration of remote sensing, GIS, traditional fieldwork and models provide a useful tool in the assessment and management of water resources and development of groundwater exploration plansItem Determination of Peak Discharge for Selected Drainage Facilities in Ilorin Metropolis for the Purpose of Storm Water Management(Nigerian Research Journal of Engineering and Environmental Sciences, 2020) Oluwaseun, O.V; Bilewu, S.O; Ayangbola, D.AThe research work was aimed at determining the peak discharge of flow (maximum storm runoff) into some selected drainage systems in Ilorin metropolis for the purpose of stormwater management. The Ilorin municipality has been observed to have drainage system inadequate in capacities to convey storm runoff as a result of solid waste disposal into drainage systems which leads to drain blockage and the excess runoff result in flood. To obtain the value of excess runoff that leads to flood in the drainage systems under study, the required drainage area (m2) for the adequate conveyance of the determined peak flow was compared with the existing drainage area (m2) the difference in both areas results in the excess runoff which leads to flood. The Rational method was used to compute peak discharge for the study areas while the Manning’s equation was adopted to compute the expected drainage channel area required for the adequate conveyance of the peak discharge. The result showed that the existing drainage area in most of the selected drainage systems is less than the required area needed to convey the peak stormwater discharge into the drainage system. The average peak discharge obtained for all the drainage channels in the study areas was 266.68 m3/s while the average area expected to convey the discharge was 8.85 m2. However, the average area of the existing drainage systems was 0.349 m2 which is relatively to as compared with 8.85 m2 which represent the excess discharge that leads to the flooding.Item Evaluation of the Effect of Precipitation Variation on Groundwater Quality in Ilorin Metropolis, Nigeria(FACULTY OF ENGINEERING AND ENVIRONMENTAL SCIENCES, OSUN STATE UNIVERSITY, NIGERIA, 2019-11) Ayanshola, A.M.; Sossou, P.M.; Bilewu, S.O; Abdulkadril, T.S.; Oluwaseun, V.O.; Owolabi, S.O.Groundwater is an essential part of the hydrological cycle serving as the primary source of water where public water supply is neither available nor adequate. This study evaluated the seasonal variability of water quality with respect to monthly rainfall depth in Ilorin metropolis, Nigeria. This was achieved by the determination of the month with minimum and maximum rainfall depth as well as determination of the concentration of Physico-chemical and bacteriological parameters of water sample in the study area. Twenty years historical data of monthly rainfall depth was obtained and analysed and a total of 32 water samples were collected from Shallow wells in the month with minimum and maximum rainfall depth from 8 different locations in year 2018 to determine their concentration. The Physico-chemical and bacteriological properties of water samples were analysed using Standard Methods. The potability of the water samples were assessed with respect to WHO standard. The study revealed that Turbidity, Fe2+, Dissolved Oxygen, Total Viable Count and Total Coliform Count concentration exceeded the Word Health Organization (WHO) standard in all the samples. Hence, the Shallow well water sources are polluted and the concentration of these pollutants increased in the month with minimum rainfall depth. The reduction in the pollutant concentration during the month with higher rainfall depth might be as a result of dilution through groundwater recharge from precipitation. The study also shows that the wells are not safe sources for drinking purposes and some form of treatment will be required before consumption.Item Geoinformatics Approach to Water Allocation Planning and Prognostic Scenarios Sustainability: Case Study of Lower Benue River Basin, Nigeria(Springer, Cham, 2020) Abdulmalik, Z.; Salami, A.W; Bilewu, S.O; Ayanshola, A.M.; Amoo, O.T.; Abdultaofeek, A.; Agbedabi, I.E.Water allocation planning in an equitable and sustainable way is intrinsically complex. This study proposes a water resource allocation system using an integrated Soil and Water Assessment Tool and Water Evaluation and Planning tool (SWAT-WEAP) model for hydrological simulation and prognostic scenarios sustainability prediction. The study explores the use of Digital Elevation Model (DEM), soil and land raster image in deriving physiographic information for land degradation impact assessment, quantification of optimal water allocation and generation of minimum ecosystem water requirement. Consequently, the SWAT quantifies the catchment water yield before been allocated optimally based on percentage dependable flow rates of 70% and 85% reliability flow regime at Makurdi, Nigeria discharge station. The WEAP model assesses the water resources utilization following scenarios adaptation by riparian users. Both models performed satisfactorily for streamflow and water yield prediction and resource sharing both in the calibration and validation phases with a correlation coefficient (R2) of 0.57–0.74 and root squared error (RSR) of 0.66–0.82. The results show how drainage network, channel length, drainage boundary, slope, and sub-catchment geometric properties demonstrate Geographic Information Systems (GIS) utility in morphoclimatic impacts assessment as a data management, scenario analysis, and decision support tool in water management for the Lower Benue River Basin, Nigeria. Planners and decision-makers need to consider several integrated plans as alternatives to adapting to climate change impacts and anthropogenic human activities in resolving the unmet demands.Item The hydraulic design of irrigation channels for Ishapa, Kwara State, Nigeria(Department of Civil Engineering, University of Ilorin, Nigeria, 2010) Ajiboye, F.O.; Ayanshola, A.M.; Bilewu, S.O; Adeleke, O.O.; Salami, A.W.The artificial application of water to land to aid crop production has enabled man to increase his ability to produce food and cash crops. All – the – year round crop production is now possible instead of the previous restriction to rain fed agriculture. However, conserving water and delivery it to the fields in an efficient manner has continued to be a challenge. This work seeks to take advantage of a dam being constructed for water supply purposes at Isapa, Kwara State, Nigeria. The reservoir capacity is far too big for the water demand and therefore a large quantity of water will be available as excess. Incidentally, an expanse of fertile land exists in the immediate downstream of the dam which is suitable for irrigation agriculture. A detailed topographical survey was carried out among other studies and a layout was prepared for the delivery of water to the fields by the use of irrigation channels. Channel parameters were established through the use various tested formulas found in literature and from experience. It was also concluded that the reservoir capacity is adequate for both water supply and irrigated farm.Item Performance-Assessment of Existing Drainage Facilities for The Purpose of Stormwater Management(LAUTECH Journal of Civil and Environmental Studies, 2020-03) Oluwaseun, O.V; Bilewu, S.O; Adejumo, E.A; Makanjuola, B.GThe 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.Item Prioritization of Adaptation Strategies for Water Supply and Demand under Climate Change and its Variability in Abuja, Nigeria(Journal of Research in Forestry, Wildlife and Environment, Department of Forestry, Wildlife and Range Management, University of Agriculture, Makurdi, Nigeria, 2016) Ayanshola, Ayanniyi Mufutau; Jacob, S.O.; Bilewu, S.O; Salami, A.W.; Mokuolu, O.A.Climate change and its impact has become a global and prime event of the 21st century. Its effects on almost all spheres of human existence are worrisome and the low awareness and complete disregard for its causes, impacts and adaptation strategies call for an urgent solution. One of its effects is a sharp variability in available water resources for human use. Created in 1976 and with a current population of over 1.6 million, Abuja, Nigeria’s capital city has a growing water supply deficit; occasioned by several factors including climate change. To mitigate the deficiency occasioned by climate change, this study has considered some adaptation strategies and prioritized them. A survey was conducted with the use of a structured questionnaire and hydro-metrological data was also gathered from various relevant agencies. By applying the Analytical Hierarchy Process as a Multicriteria Decision method in the comparison of suitable adaptation strategies, the manager’s strategy of sourcing for an additional water resources had the highest priority vector of 0.4348 while the professional strategy of raising awareness to enhance consumer behavioural change was next with a vector of 0.3097. These two methods are thus recommended to mitigate against the effect of climate change on the water supply deficit in Abuja, Nigeria. The use of water saving devices ranked lowest and thus should be considered as the least attractive option.