Author: Paul S. BellPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Comprehensive measurements of sediment resuspension processes by waves at full-scale, Part II
Author: Paul S. BellComprehensive Measurements of Sediment Resuspension Processes by Waves at Full-scale, Part I
Author: Paul S. BellComprehensive Measurements of Sediment Resuspension Processes by Waves at Full-scale, Part III
Author: Paul S. BellBasin-scale Waves Dynamics and Sediment Resuspension Mechanics in Central Lake Erie
Author: Reza ValipourPublisher:
ISBN:
Category :
Languages : en
Pages : 224
Book Description
High-resolution physical and biogeochemical field data in central Lake Erie during the summers of 2008-2009 along with a three-dimensional numerical model were used to investigate the dynamics of basin scale waves and sediment resuspension mechanisms. In Chapter 2, the modal response of the Poincaré waves in the lake is assessed. The vertical mode-one Poincaré wave was found to be mostly dominant during the seasonal stratified period. The horizontal modal structure was also investigated in a sensitivity analysis, using the numerical model forced with real and idealized wind events. In Chapter 3, dynamics of bottom mixed layer (BML), primarily forced in the outer layer by surface seiches and Poincaré waves is studied for two 10-days representative intervals of weak and strong stratification. Shear velocity was calculated by least square fitting the well-known law-of-the-wall equation to observed near-bed velocity in a region of constant shear stress. Height of the BML is computed using water density (from water temperature) and compared with heights of logarithmic layer approximated using the law-of-the-wall equation and its modified form with buoyancy length scale term. Published equations for estimating BML heights are evaluated and modified for the lake. In Chapter 4, we investigate physical processes leading to sediment resuspension in the lake including surface waves (periods of 4-8s), up/downwelling events (periods of 3-4 day), and high frequency internal waves (periods of 5-45min). Temporal changes in near-bottom sediment resuspension are illustrated using changes in acoustic backscatter signals from current profilers and time series of turbidity measurements to identify the mechanism responsible for sediment resuspension. Resuspension is parameterized as a function of the critical velocity ~0.25ms-1 and from surface waves using linear wave theory. Finally, based on the critical velocity and sediment grain size analysis (from in-site field data), critical shear stress and Shields parameter are calculated and compared with previous observations in Lake Erie and in other locations suggesting a modified Shields diagram for silty bed materials.
Applied Mechanics Reviews
Author: Introduction to Coastal Processes and Geomorphology
Author: Robin Davidson-ArnottPublisher: Cambridge University Press
ISBN: 1108424279
Category : Science
Languages : en
Pages : 541
Book Description
Grounded in current research, this second edition has been thoroughly updated, featuring new topics, global examples and online material. Written for students studying coastal geomorphology, this is the complete guide to the processes at work on our coastlines and the features we see in coastal systems across the world.
Coastal Dynamics 2005
Author: Augustín Sánchez-ArcillaPublisher:
ISBN: 9781604236729
Category : Coastal changes
Languages : en
Pages : 0
Book Description
Rhode Island Region Long-term Dredged Material Disposal Site Evaluation Project
Author: Science
Author: John Michels (Journalist)Publisher:
ISBN:
Category : Science
Languages : en
Pages : 672
Book Description
A weekly record of scientific progress.
Sedimentation Engineering
Author: American Society of Civil Engineers. Task Committee for the Preparation of the Manual on SedimentationPublisher: Amer Society of Civil Engineers
ISBN: 9780784408148
Category : Technology & Engineering
Languages : en
Pages : 1132
Book Description
MOP 110 presents extensive advances in methods of investigation, measurement, and analysis in the specialized field of sedimentation engineering.