Influence of Soil and Sediment pH and Redox Conditions on Degradation of Toxic Organics
The presence of toxic organics in soil and sediments has raised concern over persistence and bioaccumulation. In the absence of oxygen, microbial degradation of toxic organics proceeds...
Sediment Transport Measurements in the Nile River at Bani Mazar
Measurements of sediment transport on the Nile River were conducted at Bani Mazar (200 km South of Cairo) during high and low water stages. Bed-load and suspended-load transport rates...
Movable-Bed Model to Evaluate Nile River Dredging
About 200 km south of Cario, at Bani Mazar reach, the Nile River has widened and formed several islands. The result is three channels with shallow depths. One of the branches must be improved...
Application of Stable Channel Design Method
Systematic stable channel design methods are currently being developed by the US Army Engineer Waterways Experiment Station for use in the planning stages of local flood control projects....
Bed Load Roughness in Supercritical Flow
A supercritical concrete channel is proposed for Mission Creek located in Santa Barbara County, California. The proposed channel may transport gravels and cobbles as bed load during large...
A Review of Sediment-Water Column Process Modeling and Future Applications in Waste Load Allocation
The capabilities of empirical modeling techniques are discussed and three promising mechanistic models to simulate sediment-water interactions are reviewed with respect to their possible...
Three-Dimensional Modeling of Transport of Fine Sediments and Contaminants in Lakes and Estuaries
The transport of fine sediments and contaminants due to currents and wind waves in estuaries and lakes have been studied by means of field experiment, laboratory experiment and a comprehensive...
Submerged Vane Projects for Bank Stabilization and Sedimentation Management
Submerged vanes are small flow training devices placed in a stream to eliminate or create secondary currents to direct sediment in a controlled fashion. In recent years submerged vanes...
Bridge Scour Research Needs
This paper presents a summary of the Federal Highway Administration (FHWA) priority research emphasis on bridge scour, sedimentation, and stream stability problems. The most persistent...
Sedimentation Problems and Solutions: Roseires Dam and Reservoir, Sudan
Roseires Dam and reservoir are located in Sudan, Africa on the Blue Nile River. The hydropower from the reservoir provides approximately 80% of the power used in Sudan, thus having a tremendous...
Flood Control Design for Development on Alluvial Fans
Hydrology, debris production, sediment transport and hydraulic studies were conducted to provide flood control for a development within an alluvial fan floodplain. Innovative techniques...
Verification of a Numerical Model for Suspended Sediment Transport in San Francisco Bay
Two-dimensional vertically averaged hydrodynamic and sediment transport models were verified to field measurements from a 25-hour intensive survey in central San Francisco Bay. Excellent...
River Dike Design Using a Numerical Model Approach
The preliminary design of a dike field at Redeye Crossing on the Mississippi River (Baton Rouge, Louisiana) is discussed. The TABS-2 modeling system was used to develop a two dimensional...
Kings Bay Channel Expansion Hybrid Model Assessment
A hybrid modeling system (coupled physical and numerical models) was developed to assess velocity and sediment impacts associated with channel expansion. Physical model tides and velocities...
Effects of Fine Sediment Intrusion on Spawning Gravel in Southeast Alaska
The supply of sediment to forest streams in Southeastern Alaska is related to the inherent instabilities of landforms, stream channels and the effects of logging practices. Debris avalanches,...
A New Approach to Local Scour Depth Estimation Under a Horizontal Jet or Free Water Fall
A new formula is presented to estimate the local scour depth development with time due to a horizontal jet or free water fall based on a new approach which combines the concept of energy...
Sediment Modeling of Dam Removal Alternatives, Elwha River, Washington
The new version of the U.S. Army Corps of Engineers (ACOE) 1-Dimensional sediment transport model, HEC-6 'Scour and Deposition in Rivers and Reservoirs', was...
Sediment Problems Associated with Dam Removal, Muskegon River, Michigan
This paper presents an analysis of sediment movement in Michigan's Muskegon River following the removal of Newaygo Dam. The analysis utilized a physical process simulation...
Predicted Fluvial Response to Dam Removal in the Kalamazoo River Valley, Michigan
Research has been conducted by the Michigan Department of Natural Resources (MDNR) to predict the fluvial response to dam drawdown and determine the distribution of recent deposits along...
Proposed Methodology to Update Embayment Sedimentation Data for TVA Reservoirs
The purpose of this paper is to evaluate the accuracy and usefulness of bathymetric data resulting from routine fisheries and aquatic biology hydroacoustic surveys in TVA reservoirs for...
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