Application of GIS in Water Management of Eleyele Catchment, South-Western Nigeria

Eleyele dam has drastically reduced in capacity since its inception in 1942. There are frequent flood incidences within the dam catchment area- noteworthy of them is the August, 2011 flood incidence. This research studies the hydrological condition of Eleyele catchment through the use of Geographic Information System. The topographical maps, digital elevation measurement maps (DEM) and hydrological maps of the Eleyele catchment were produced through GIS watershed delineation process for the year 1967 and year 2014.The results show that there is an average lowering of elevation of about 14.63m within the catchment which has greatly affected the hydrological pattern of the catchment. The Triangulated Irregular Network (TIN) of the catchment was used to produce flood risk map. The map showed that 25.24% of the catchment is prone to flooding. The study showed that there is a change in topography of Eleyele Catchment within the period studied. This is due to the urbanization of the area. Keywords: Eleyele Dam, Flood Incidences, Hydrological Condition, GIS, Watershed Delineation Process, Triangulated Irregular Networ

British Standard and Euro Code: Model of Singly Reinforced Rectangular Concrete Under Actions

Upgrading are desired Changes on any standard in operation. Meanwhile context understanding are required to achieve positive impact on the subject system. In same vein, codes of practice are always revised and that users should be made to use the latest edition of any relevant standard. Thus a model is developed to describe the sectional analysis difference with predicting implications of various combinations of sectional dimensions in structural reinforced concrete elements with reference to the two codes.  The method adopted is purely mathematical technique of modeling, concept and application. Based on the previous behavioural knowledge of such using BS code, Okeniyi et al (2012), a concrete rectangular section of singly reinforced status was also used as a case study. The section was analyzed from stress-strain relationship to formulate the governing equations and the same was specified by breadth b, total depth h and moment of resistance MR. This was simulated to describe the relationship between the variable parameters and predict the behavior of a rectangular section under loads with reference to British Standard and Euro Code. The model, thus defines clearly sectional analysis difference increasing understanding for better structural design skill. Keywords: Reinforced Concrete, Stress-Strain Relationship, Rectangular Section and Moment of Resistance DOI: 10.7176/CER/12-6-05 Publication date:June 30th 202