Abstract

Hydrography is: “The art and science of compiling and producing charts, or maps, of water-covered areas of the Earth’s surface”. The writeup aimed at producing a bathymetric survey of Eleyele Lake at Ido Local Government Area, Oyo State, Nigeria. With an objective of showing variation in depth across the sea bed. The methodology adopted was based on the use of Echo Sounder SDE 28 and its accessories and other surveying equipment’s such as GPS, Level and accessories etc. to determine the X, Y coordinates and the depth of points across the sea bed. Further analysis on the data obtained was carried out using ArcGIS 10.3 and Surfer 13. The result from the bathymetric maps and charts can be used to determine the locations of shallow depth and its topography of which suggestion was made to Engineers in case of obstructions to navigation, and pipelines works). For futuristic analysis, further bathymetry survey in the study area will show if changes have occurred in accretion and dredging of the Lake.