Browsing by Author "Jimoh, M.O."
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Item Assessment of types and significant causes of building defects in University of Ilorin, Ilorin, Nigeria(Department of Civil Engineering, University of Ilorin, Ilorin, Nigeria, 2017) Lawal, A.R.; Jimoh, M.O.; Jimoh, A.A.Cases of building collapse in Nigeria has been on the increase since the turn of the millennium. Yet, it has been observed that most of these buildings do not just give way and fail; they first show symptoms of distresses in the form of defects. It can be said that defects in buildings constitute undesirable challenges and threats to users. Thus, investigation studies were carried out in University of Ilorin on some of its buildings, so as to determine the types and major causes of defects with a view to ultimately suggest appropriate reducing measures. The research was divided into qualitative strategy which served to reveal physical extent, and quantitative strategy which helped to gather factual data and study the relationship between how such facts accord with findings and research of past literatures. Case study survey and questionnaire survey were used. While the former helped to present the frequency of defects as actually obtainable, the latter method of assignment provided the perception levels of study respondents (clients, consultants, contractors and end users) on defects in University of Ilorin buildings. Findings thus reveal that active cracks (>1.5mm wide) on beams, columns, slabs and walls are the most frequent type, while improperly sloped roof gutters are the least frequent type. Also, workmanship error accounted for the most probable cause of 70% of the type of defects, while defective material accounted for the most probable cause of 30% of the types of defects.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 plans