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Optimization Modeling for Sedimentation in Alluvial Rivers Considering Uncertainties
A nonlinear optimization model is formulated for determining optimal reservoir releases to minimize channel bed aggradation and degradation in downstream rivers. The model is based upon...

Refined Modelling of Water Quality Constituents in a Semi-Enclosed Coastal Wetland Basin
Details are given of the refinements to a numerical model to improve the representation of the advective transport of water quality constituents. The higher order accurate scheme adopted...

Current Legal Issues in Sedimentation
This paper represents the updating of Chapter 7 for Manual 54. There has been considerable change in legal rulings and precedent law since the first edition of Manual 54. Many of these...

Engineering Geomorphology
Engineering geomorphology is the application of geologic and geomorphic principles to the solution of river engineering problems. Development of a process-based understanding of a problem...

Multi-Disciplinary Strategies for Flood-Plain Restoration at the River Rhine
Within the scope of a multi-disciplinary concept, aims and measures of ecological and water resources management at the river Rhine in Nordrhein-Westfalen (Germany) are analyzed. Especially,...

Quality Control and Quality Assurance Plan for Bridge Channel-Stability Assessments in Massachusetts
A quality control and quality assurance plan has been implemented as part of the Massachusetts bridge scour and channel-stability assessment program. This program is being conducted by...

Quality Control in Evaluating Scour at Bridges
Quality control procedures currently in use for conducting statewide bridge scour screening and evaluation studies are described. The procedures address bridge scour screening and calculation...

Hurricane Andrew in South Florida: Preparing a Water Management System for Disaster
This paper analyzes Hurricane Andrew from its beginning as a tropical storm to the powerful force that it later became. The careful monitoring that took place throughout its transformation...

Hurricane Andrew in South Florida: Steps to Recovery and Lessons Learned
This is the second part of a two-part paper which analyzes the development and impact of Hurricane Andrew in South Florida. The paper specifically deals with the experiences of the South...

Quantification of Uncertainties in a Water Quality Model with Application to the Sacramento-San Joaquin Delta
A methodology is described that allows a quantitative verification of water quality models. The methodology provides a quantitative analysis of model accuracy that takes into account different...

Reclamation's Design Process of Early Warning Systems for Dam Safety
This paper discusses the Bureau of Reclamation's process for designing the detection and decision making components of an Early Warning System (EWS) for dams with hydrologic deficiencies....

Density Currents in Pollutant Transport and Mixing
A buoyant spreading model for the current-advected plume is formulated including several distinct mechanisms: convective spreading, interfacial friction spreading, entrainment at the density...

A Study of Lateral Bed Slopes Developed at Bend
A study was conducted to compare seven actual cross section profiles of Philip Bayou Realignment with the lateral bed slopes estimated from the model derived by Ikeda titled `Sediment...

Nonuniform Transient Sediment Transport Modeling
A numerical model based on Lai's (1991) multimode scheme for fully coupled simulation of water and sediment movement in mobile-bed alluvial channels with nonuniform bed materials has been...

Visualization and Analysis of Multi-Dimensional Velocity Measurements in Carquinez Strait, California
On 11 March, 12 March, 15 April, and 16 April, 1991 the United States Geological Survey (USGS), Sacramento, CA, employed a Downward Looking Acoustic Doppler Current Profiler (DL-ADCP)...

Stratification Models Sensitivity to Solar Radiation Data
A one-dimensional water quality model (WESTEX model) for simulation of thermal stratification is used to test the performance of such models related to hydrometeorological input data....

Low-Flow Habitat in Flood Control Channels
A critical phase in the life cycle of many riverine species in flood control channels is during low-flow periods when the quantity and quality of available habitat diminishes. However,...

Research Needs for Debris Flow Disaster Prevention
A 'soft' disaster reduction strategy is proposed based on identification of hazard location, extent and maximum intensity; monitoring of antecedent catchment moisture, sediment and vegetation...

Fish Screen Developments, Columbia River Dams
This paper describes developments to date for a fish diversion and bypass system being tested for two Columbia River dams. Because of the concern for the negative impacts of screen systems...

A Simple and Reliable Method For Analysis of Water Supply Distribution
The proposed analysis, may be regarded as a bridge between the practical sample analysis and the optimization model development. From the analysis and observation of water distribution...

 

 

 

 

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