Browsing by Author "Aremu, A.S."
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Item A GIS-AHP based approach for siting municipal landfill in Ilorin(Journal of Engineering Research, 2015) Aremu, A.S.; Yusuff, A.A.Selecting the most appropriate landfill site has been a major challenge to municipal solid waste managers because it involves the consideration of several environmental factors. This study employed the combination of Geographic Information System (GIS) and Analytic Hierarchy Process (AHP) to select the most suitable location for a landfill in Ilorin, Nigeria. GIS was used to digitize all the spatial features related to landfill selection while excluding unsuitable areas. A total of eleven potential landfill sites were identified from GIS analysis and an AHP model was developed to rank these sites. The AHP model rated Candidate site 10 as the most preferable landfill site after trade-offs between key environmental factors such as slope, area and proximity to major road, pipeline, airport, railway line, built-up areas and water bodies. This illustrated approach makes it very easy for environmental planners to spatially buffer unsuitable locations for landfills, identify criteria priorities, and select the most suitable site under each criterionItem An Analytic Hierarchy Process framework for determining appropriate number of municipal waste bins.(NSE Technical Transactions. , Published by Nigerian Society of Engineers (NSE)., 2011) Aremu, A.S.; Sule, B.F.; James R. MItem Assessment of Domestic Charcoal Consumption in Ilorin, Kwara State(Geo Studies Forum, Published by the Department of Geography and Environmental Management, University of Ilorin, Nigeria., 2016) Olaoti-Laaro, S.O.; Aweto, A.O.; Ganiyu, H.O.; Aremu, A.S.; Jeminiwa, O.R.Item Assessment of Neural Networks Performance in Modeling Rainfall Amounts(Research in Forestry, Wildlife and Environment, 2017) Abdulkadir, T.S; Salami, A.W.; Aremu, A.S.; Ayanshola, A.M.; Oyejobi, D.O.Item Assessment of Neural Networks Performance in Modeling Rainfall Amounts(Department of Forestry, Wildlife and Range Management, University of Agriculture, Makurdi, Nigeria, 2017-03) Abdulkadir, T.S.; Salami, A.W; Aremu, A.S.; Ayanshola, A.M.; Oyejobi, D.O.This paper presents the evaluation of performance of Neural Network (NN) model in predicting the behavioral pattern of rainfall depths of some locations in the North Central zones of Nigeria. The input to the model is the consecutive rainfall depths data obtained from the Nigerian Meteorological (NiMET) Agency. The neural networks were trained using neural network toolbox in MATLAB with fifty years (1964–2014) total monthly historical data of five locations while two other locations, Abuja and Lafia with twenty-nine years (1986-2014) and eleven years (2004-2014) total monthly data respectively. Analysis showed the variation in the values of correlation coefficients (R) for each location of the study area in response to change in number of hidden neurons. The average R values of 0.80, 0.62, 0.65, 0.67, 0.79, 0.76 and 0.81 with corresponding mean square errors of 2.12, 0.23, 0.26, 0.36, 2.61, 1.18 and 1.03 were obtained for Abuja, Makurdi, Ilorin, Lokoja, Lafia, Minna and Jos respectively. The results showed some slight variability in the performances of NN due to changes in the number of hidden neurons during the network training. These values of R indicated that the networks are fit to be used for the subsequent quantitative prediction of rainfall depths in each location which is useful for safeguarding against future flood and drought occurrence in the North Central zone, Nigeria.Item Assessment of noise pollution from sawmill activities in Ilorin, Nigeria(2015) Aremu, A.S.; Aremu, A.O.; Olukanni, D.O.This study examined noise pollution from sawmilling in Ilorin metropolis, Nigeria. Noise measurements were made using HD600 digital data logging sound level meter in conjunction with structured questionnaire which was designed to elicit noise related information. The results of the study showed that the background noise within the sawmills was 58.1-64.86 dB(A) while machine equivalent noise was 81.1-112.3 dB(A). Approximately 73% of all the noise measurements are above the recommended limit of 85 dB(A) and these high noise intensities can initiate or perpetuate some work related health challenges. Also a noise contour map which shows the spatial impact of sawmill noise on the metropolis was developed. Within the sawmills, most of the workers are unprotected, disturbed and complain of noise-related ailments such as tinnitus (96.6%), headache (86.6%) and hearing impairment (71.9%). Therefore noise prevention and control strategies are suggested in addition to frequent audiometric tests, training, education, and enforcement of noise regulations.Item Case Study Evaluation of Health-Care Waste Challenges in Hospitals within Ilorin Metropolis.(Civil Engineering Department, University of Ilorin, Ilorin, Nigeria, 2009-08-28) Ajimotokan, H.A.; Aremu, A.S.This paper examines health-care waste (HCW) management challenges in hospitals within Ilorin metropolis of Kwara State, Nigeria. The ways by which hospitals in Ilorin, manage their HCW was evaluated using a structured questionnaire which was administered to public and private hospitals within the metropolis. About 177.67kg of wastes was found to be generated daily and the average waste generated per bed per day was 1.56kg. The management of these wastes is often poor, with a mixture of potentially infectious and non-infectious wastes being a common sight in hospital waste bins and hospital environment. The method of waste disposal is by open burning at Ita-Amo or Asa dam dumpsite. This approach is hazardous and constitutes environmental threats, increased vulnerability to potential transmission of communicable diseases and natural disasters. Treatment facility coupled with environmentally friendly recycling and recovery options are the most single effective environmental measure necessary for HCW management.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 Effects of Sand Bed Anti-Vibration Mount on Transmitted Noise from Portable On-Site Electricity Generator(2020) Aremu, A.S.; Amao, T.K.; Mokuolu, O. A.This study investigated the effect of different particle sizes of sand bed anti-vibration mount on transmitted noise from a portable on-site electricity generator. Ten sand bed anti-vibration mounts, 650mm x 650mm in cross section and 75mm thickness were prepared with particle sizes ranging from 0.09 to 2.30mm. Noise measurements were taken in the four cardinal directions using Extech HD600 digital sound level meter. The results of the study showed that the ability of the sand particles to dampen vibration noise from the portable electricity generator reduces with increase in particle size. The sand bed anti-vibration mounts reduced noise levels by 0.11 to 2.78 dB(A). However, fine sand bed of particle size 0.09mm and 0.15mm exhibited superiority in noise reduction over all other sand beds. In order to achieve appreciable noise reduction, the use of ISO 14688-1:2002 fine sand category is recommended as anti-vibration mount in combination with other damping methods.Item Effects of Sludge Ash on Short-Term Compressive Strength of Hardened Concrete(Journal of Research Information in Civil Engineering : Published by Department of Civil Engineering, University of Ilorin, Ilorin, Nigeria., 2004) Aremu, A.S.; Ige, O.AItem Evaluation of Crop Water Requirements of Maize in Nigeria Using FAO Penman-Monteith Model(Nigerian Journal of Hydrological Science, 2018) Aremu, A.S.; Salami, A.W.; Ayanshola, A.M.; Dauda, K.A.Irrigation practices are best done by estimating the crop water requirement in order to avoid over or under irrigation which may negatively affect crop yields. In this study, weather data spanned (1995-2015) were collected and analysed for eighteen weather stations in Nigeria. The data obtained include minimum and maximum temperature (oC), relative humidity (%), wind speed (km/day), sunshine (hr /day) and radiation (MJ/m2/day). The FAO Penman-Monteith model was used to compute the mean monthly reference evapotranspiration (ETo). The mean monthly ETo estimated for each weather station by FAO Penman-Monteith model were multiplied by the average crop coefficient (Kc) of Maize (0.60) to determine the crop water requirements. The results of the analyses showed that the mean monthly average crop water requirements (ETc) estimated for the six zones are 5.67, 6.95, 4.48, 3.30, 0.94, and 1.99 mm/day. The graphical relationship of mean monthly crop evapotranspiration (ETc) values across the period of record shows that ETc estimates at North-East ranked 2nd with the highest values from 1996 to 2000 and North-West also have the highest values of ETc in 1996, 2003, 2006, 2009, 2011, 2012, 2013 and 2015. The ETc estimates at North-Central ranked 3rd with highest value in 2014 and ETc estimates at South East and South West are in closest agreement followed by South-South ETc estimates which has the lowest ETc value except in 2002 that South-West has the lowest ETc value. Therefore, this study will be useful to the agricultural water management and regional water resources planning.Item Evaluation of municipal solid waste management system and willingness to pay for its improvements in Ilorin, Kwara State, Nigeria.(Nigerian Journal of Technology (NIJOTECH), published by Faculty of Engineering, University of Nigeria, Nsukka, Enugu State, Nigeria., 2015) Ayanshola, A.M.; Aremu, A.S.; Jacob, S.O.,; Bilewu, S.O.; Salami, A.WItem Evaluation of Municipal Solid Waste Management System and Willingness-to-pay for its Improvements In Ilorin, Kwara State, Nigeria(Nigerian Journal of Technology (NIJOTECH), 2015) Ayanshola, A. M.; Aremu, A.S.; Jacob, S. O.; Bilewu, S. O.; Salami, A. W.Item Evaluation of noise pollution and effects on workers during wheat processing.(Journal of Applied Science and Environmental Management (JASEM), Published by University of Port Harcourt, Nigeria., 2014) Ibrahim, I.B.; Aremu, A.S.; Ajao, K.R.; Ojelabi, A.T.ABSTRACT: This study assessed the intensity and likely effects of noise on workers during wheat processing. Noise measurements were taken using HD600 sound level meter. Subjective assessment of the effects of noise was undertaken using semi structured questionnaire. Also audiometric test was conducted on workers using AD229e diagnostic audiometer. The results of the study show that during wheat processing operations, the noise level in the factory ranges between 56.0 dB(A) and100.9 dB(A). Also, only 25.6 % of all the readings was below the specified limit of 85 dB(A). Workers are also observed to have certain forms of physiological and psychological disorders related to noise. The audiometric test results revealed that 33 % of the examined workers have defect in their left or right ear. Based on these results, WHO Class-5 hearing protector is recommended to be worn by workers in the processing sections while room acoustics should be upgraded to absorb some sounds transmitted to offices.Item Generation, management challenges and prospects of wood waste in Ilorin, Nigeria.(The Nigerian Engineer, Published by Nigerian Society of Engineers (NSE)., 2011-05) Lasode, O.A.; Balogun, A.O.; Aremu, A.S.Item Historical climate variability and water supply in Ilorin: Perceptions and predictions(Centre for Ilorin Studies (CILS), University of Ilorin, Ilorin, Nigeria, 2013) Aremu, A.S.; Salami, A.W; Ayanshola, A.M.Item Historical climate variability and water supply in Ilorin: Perceptions and predictions. .(Published by Unilorin Press, Ilorin, Nigeria., 2013) Aremu, A.S.; Salami A.W.; Ayanshola, A.M.Item In-town tour optimization of conventional mode for municipal solid waste collection.(Nigerian Journal of Technology (NIJOTECH), . Published by Faculty of Engineering, University of Nigeria, Nsukka, Enugu State, Nigeria., 2013-11) Aremu, A.S.This study study study study illustrates the application of a simple and efficient Solver add illustrates the application of a simple and efficient Solver add illustrates the application of a simple and efficient Solver add illustrates the application of a simple and efficient Solver add----in tool in Microsoft Office Excel in tool in Microsoft Office Excel in tool in Microsoft Office Excel in tool in Microsoft Office Excel© ©© © 2010 2010 2010 2010 software for in software for in software for in software for in----town tour optimization of solid waste collection. Data required for tour optimization was town tour optimization of solid waste collection. Data required for tour optimization was town tour optimization of solid waste collection. Data required for tour optimization was town tour optimization of solid waste collection. Data required for tour optimization was obtained from the municipal authority, field studies, and a digitized map of obtained from the municipal authority, field studies, and a digitized map of obtained from the municipal authority, field studies, and a digitized map of obtained from the municipal authority, field studies, and a digitized map of Ilorin, Nigeria while collection Ilorin, Nigeria while collection Ilorin, Nigeria while collection Ilorin, Nigeria while collection operation was formulated as a Trav operation was formulated as a Trav operation was formulated as a Trav operation was formulated as a Traveling Salesman Problem on Excel spreadsheet. The results obtained from eling Salesman Problem on Excel spreadsheet. The results obtained from eling Salesman Problem on Excel spreadsheet. The results obtained from eling Salesman Problem on Excel spreadsheet. The results obtained from the optimization of ten prominent routes revealed that the optimization of ten prominent routes revealed that the optimization of ten prominent routes revealed that the optimization of ten prominent routes revealed that two two two two empirical route empirical route empirical route empirical routes ss s had the same tour had the same tour had the same tour had the same tour distance distance distance distance as the as the as the as the optimized tour. optimized tour. optimized tour. optimized tour. However, in the remaining eight However, in the remaining eight However, in the remaining eight However, in the remaining eight routes, the optimization process reduced tour distance by routes, the optimization process reduced tour distance by routes, the optimization process reduced tour distance by routes, the optimization process reduced tour distance by 2.04 2.04 2.04 2.04---- 19.27 %, tour time by 0.33 19.27 %, tour time by 0.33 19.27 %, tour time by 0.33 19.27 %, tour time by 0.33----22.80 %, and fuel consumption 22.80 %, and fuel consumption 22.80 %, and fuel consumption 22.80 %, and fuel consumption by by by by 1.78 1.78 1.78 1.78----20.54 %. T 20.54 %. T 20.54 %. T 20.54 %. The cost incurred in purchasing he cost incurred in purchasing he cost incurred in purchasing he cost incurred in purchasing diesel is also expected to decrease by diesel is also expected to decrease by diesel is also expected to decrease by diesel is also expected to decrease by US$0.11 US$0.11 US$0.11 US$0.11----US$1.65/vehicle/day. US$1.65/vehicle/day. US$1.65/vehicle/day. US$1.65/vehicle/day. Therefore, the pro Therefore, the pro Therefore, the pro Therefore, the proposed method posed method posed method posed method can serve can serve can serve can serve as as as as a a a a valuable tool for reducing some valuable tool for reducing some valuable tool for reducing some valuable tool for reducing some socio socio socio socio----economic and environmental impacts associated with solid waste economic and environmental impacts associated with solid waste economic and environmental impacts associated with solid waste economic and environmental impacts associated with solid waste collection. collection. collection. collection.Item Influence of Asa dam on Hydrometeorological Variables in Asa River Basin, Ilorin,(Journal of Research Information in Civil Engineering: Published by Department of Civil Engineering, University of Ilorin, Ilorin, Nigeria, 2007) Aremu, A.S.; Adebara, S.A.The construction of a dam is usually accompanied by some environmental impacts, this usually calls for pre- and post- environmental impact studies to quantify the changes that have taken place. The aim of this study is to assess the influence of Asa dam on Asa River Basin. The hydro-meteorological aspect of the environmental impact studies was carried out and it involved collection and analysis of meteorological and hydrological data. The meteorological data were collected at the Ilorin airport which is within the catchment of Asa river and the hydrological data were collected at the Kwara State Water Corporation which is the body monitoring the four stream gauging stations along Asa river. The mean monthly variations of some meteorological variables such as rainfall, temperature, relative humidity, evaporation, water balance and wind frequency were analyzed using composite bar chart and the detrending time series analyses. The time series analysis for post dam condition revealed negative correlation with temperature, wind speed, evaporation and stream flow. This is an indication that these variables would be decreasing with time. However, positive correlation exists between the time and rainfall, humidity and sunshine hour. This implies that there is tendency for these variables to increase as a result of the construction of the dam.Item Optimization of waste bin location and size for Ilorin, Nigeria.(Nigerian Journal of Engineering, Published by Faculty of Engineering, Ahmadu Bello University, Zaria., 2012) Aremu, A.S.; Sule, B.F.