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Velocity Pulse Model for Turbulent Diffusion from Flowing Water into a Sediment Bed
Publisher: American Society of Civil Engineers
Abstract: The “velocity pulse model” simulates the transfer of turbulence from flowing water into a sediment bed, and its effect on the diffusional mass transfer of a solute (e.g., oxygen, sulfate, or nitrate) in the sediment bed. ...
Oxygen Demand by a Sediment Bed of Finite Length
Publisher: American Society of Civil Engineers
Abstract: A model of sedimentary oxygen demand (SOD) for a sediment bed of finite length is presented. The responses of diffusive oxygen transfer in turbulent flow above the sediment surface and of microbial activity inside the ...
Dissolved Oxygen Demand at the Sediment-Water Interface of a Stream: Near-Bed Turbulence and Pore Water Flow Effects
Publisher: American Society of Civil Engineers
Abstract: A microbial dissolved oxygen (DO) uptake model was developed for a stream bed, including the effect of turbulence in the flow over the bed and pore water flow in the porous bed. The fine-grained sediment bed has hydraulic ...
Rinsing of Saline Water after Frequent Road Salt Applications from an Unsaturated Sandy Soil by Rainwater Infiltration: Significance of Rainfall Duration
Publisher: American Society of Civil Engineers
Abstract: Numerical one-dimensional (1D) model simulations were performed on the infiltration of freshwater as saturated plug flow into an unsaturated sandy soil at field capacity composed of coarse sand or sands (with saturated ...
Rinsing of Saline Water after Frequent Road Salt Applications from an Unsaturated Sandy Soil by Rainwater Infiltration: Significance of Rainfall Duration
Publisher: American Society of Civil Engineers
Abstract: Numerical one-dimensional (1D) model simulations were performed on the infiltration of freshwater as saturated plug flow into an unsaturated sandy soil at field capacity composed of coarse sand or sands (with saturated ...
Closure to “Periodic Diffusional Mass Transfer Near Sediment∕Water Interface: Theory” by Makoto Higashino, Heinz G. Stefan, and Charles J. Gantzer
Publisher: American Society of Civil Engineers
Periodic Diffusional Mass Transfer near Sediment/Water Interface: Theory
Publisher: American Society of Civil Engineers
Abstract: Time-variable (periodic) flow over a lake bed, and the associated boundary layer development, have the potential to control or at least influence rates of mass transfer across the sediment/water interface. An analysis for ...