Computation of Total Sediment load in River Osun, Southwestern Nigeria
Journal Title: International Journal of engineering Research and Applications - Year 2018, Vol 8, Issue 6
Abstract
Modeling of sediment transport can be used to solve environmental and water quality problems. Sediment transport rate hinge upon hydraulic flow, upstream sediment supply and bed composition. River Osun is a river in southwestern of Nigerian that is ascribe in local mythology to have a woman turn into flowing water after a traumatic event. There is paucity of information on sediment transport dynamics of the riverHydrological and geometrical data were measured for 12 months at four sampling stations across River Osun. Stage and discharge rating equation was developed, the developed rating equation was used to predict discharge Schoklitsch’s (1950) equation and equation developed by USACE (1995) and Ongley (1996) were used to estimate unmeasured and measured load, respectively. However, comparison was made between Meyer Peter’s (1951) equation, Schoklitsch’s (1950) equation, Nielsen’s (1992) equation and Einstein’s (1950) equation results.The slope, discharge, flow area and Suspended Sediment Concentration (SSC) ranged between (0.0032-0.0046), (0.53- 17.48)m3 /s, (3.83-47.46)m2 and (10-175)mg/l, respectively. The average median grain size was 2.4mm. The seasonal suspended and bed load across River Osun were 206.43x103 kg/annum and 2,538.77x103 kg/annum, respectively. The total sediment load on River Osun was 9,512.72x103 seasonal kg/annum. The coefficient of regression of 78% was obtained between the simulated and measured discharge values. Considering the quantity of sediment load computed on River Osun, preventive measure should be taken by the appropriate authority to reduce the sedimentation in River Osun
Authors and Affiliations
Olaniyan O. S, Adegbola A. A, Oladeji O. S, Adejumo K. S
Keywords
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