Journal of Geology & Geophysics

Journal of Geology & Geophysics
Open Access

ISSN: 2381-8719

+44 7868 792050

Lucky O Imagbe

Department of Geology, University of Jos, Jos, Nigeria

  • Research Article   
    Sediment Grains Entrainment: Comparing Bed Shear Stress Estimation Methods
    Author(s): Lucky O Imagbe*

    Sediment bed shear stress is well known to effectively contribute to the entrainment of sediment grains from parent bed as well as in the initiation of grain motion into suspension flow. Direct measurement of the magnitude of bed shear stress in varying field conditions has always presented difficult challenges hence it is estimated from observations and analysis of flow velocity fluctuations above the flow bed. Reports of some recent researches have shown poorer agreement in estimates of bed shear stresses from existing multiple sources including the bed slope, log profile, Reynolds stress distribution, turbulent kinetic energy and this raises questions with regards to the estimates validity. Estimates obtained for bed shear stresses from multiple methods are expected to show considerable agreement using similar sets of flow data. This paper reports .. View More»

    Abstract HTML PDF