In this study, the effects of boundary influence on flow characteristics Rivers Ala and Orisa were investigated. Soil samples collected from three points each both rivers namely Glory Parish Area (GPA), Olusola Oke (OOA) Fiwasaye; Aran-Orin (AOA), Rore Omu-Aran Respectively. A MGG/KL-DCB Portable Electromagnetic Velocity Meter was used to measure in-situ readings discharge velocity at various p...

In this paper twelve different empirical resistance coefficients expressed in terms of Manning's roughness are used apiece in seventeen known compositing methods. The data obtained from ten different cross-sections of the Sefidrood River, Iran, are used for the evaluation of the empiricalformulas. The present case-study is selected from a reach with gravel bed topology. Then no remarkable bed f...

in this paper twelve different empirical resistance coefficients expressed in terms of manning's roughness are used apiece in seventeen known compositing methods. the data obtained from ten different cross-sections of the sefidrood river, iran, are used for the evaluation of the empiricalformulas. the present case-study is selected from a reach with gravel bed topology. then no remarkable bed f...

abstract in all river engineering projects, determination of flow resistance is essential. most commonly, the manning roughness coefficient, , is used to describe the flow resistance or relative roughness of main channel or flood plane. over the past decades little or no study has been conducted to investigate the effects of particle shapes on manning roughness coefficient. therefore, it is the...