RESERVOIR SEDIMENTATION OF A REGIONAL WATER DEVELOPMENT SCHEME IN A TROPICAL RURAL SETTLEMENT OF KWARA STATE, NIGERIA
No Thumbnail Available
Date
2014
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Association of Nigerian Geographers
Abstract
This paper investigates the level of silts and sediments deposited in Oyun dam; a regional water supply project designed to serve seven communities in Kwara State of Nigeria. The dam was commissioned in 1967 with initial height of 7 meters was later raised to 9.8 meters in 1988 so as to meet the increasing water need of the region. Data used was generated from simple land survey technique which entails the imposition of 45 grids of 40m x 40m on the lake. In each grid, depth of the lake was measured and this data helped in estimating the current capacity of the lake. The result of sediments obtained showed that Oyun reservoir currently has a mean depth of 4.33 meters which indicates a loss of about 5.47 meters depth to sedimentation in filling. This figure represents about 55.8 percent loss in storage capacity of the lake. Likely reasons for high sediment level in the reservoir were examined while recommendations that can be used in abating the high sedimentation rate of the reservoir were also suggested .
Description
Keywords
Dam, Land use, Sedimentation, Siltation, Reservoir