Data Acquisition for Determining the Physical Impacts of Navigation
Research is being conducted to determine the physical effects of navigation on the Upper Mississippi River System (UMRS). Extensive field data on various aspects of physical effects of...
Two-Dimensional Finite Element Simulation of the Flooding Characteristics in Kawainui Marsh, Hawaii
This paper summarizes the results from the calibration and application of a two-dimensional finite element model capable of simulating the complex circulation characteristics of Kawainui...
Application of Weakly Compressible Flow Method to 2-D Open Channel Flows
The depth averaged equations for open channel flows are shown to be similar to that of the weakly compressible flows. The finite volume scheme developed for weakly compressible flows has...
Numerical Computation of Free Surface Weir Flow Using Isoparametric Finite Elements
Numerical computation of flows with a free surface boundary involves three problems in one: the internal flow problem, location of the free surface and the actual flow rate. The development...
Solving Turbulent Flows with Finite Elements
A finite element computer code using the q - r turbulence model is applied to turbulent flow under a sluice gate. The addition and slow removal of artificial diffusion enhances convergence....
Grid-Induced Errors in Depth-Averaged Flow Fields
A computer code called CH2D (Curvilinear Hydrodynamics in Two Dimensions) for computing depth-averaged free-surface flow fields has been used to assess the impact of the rate of change...
Two-Dimensional Floodplain Modeling
A two-dimensional horizontal finite element numerical model (RMA-2) was applied to a 15 mile (24 km) river channel-floodplain reach in West Germany. Previous applications of such models...
Beach Evolution in Sulphur Island
Seasonal variation of shore area of Sulphur Island is studied by analyzing aerial photographs of the island taken seasonally for the past two years. Analysis reveals that shore area in...
Mass Conservation in the RMA2V Code
This paper discusses the RMA2V hydrodynamic code with a particular interest in mass conservation problems. These originate from at least two sources. One of which is the slip flow boundary...
Streamflow Forecasting: Experiences in Development of Customized Systems for Hydropower Operations
Technical advances in computers and real time data acquisition favor the development of computer based streamflow forecasting systems. These technical advances should be combined with...
Major Sedimentation Issues for the USGS
Historically, sediment information has been used primarily in planning for engineering structures that were designed to meet a single or a very limited number of objectives. Today most...
3-D Free Surface Flow Modeling by Efficient Finite Element Method
3-D free surface flows in highly irregular boundary configurations are among the most difficult natural phenomena to be simulated by mathematical modeling. Not only the problems of accuracy,...
Hydrologic Aspects of Flood Warning?Preparedness Programs
A reliable flood-threat recognition system is a vital component of a sound flood warning-preparedness program. Fundamental questions associated with the development of a flood-threat recognition...
3-D Cavity Flow Analysis by a New Fractional Step Method Based on the Finite Element Method
This paper describes a new finite element scheme for solving the time-dependent incompressible viscous fluid flow expressed in terms of the Navier-Stokes equations. The main feature of...
An Acoustic Doppler Discharge-Measurement System
A discharge-measurement system that uses a vessel-mounted acoustic Doppler current profiler has been developed and tested by the U.S. Geological Survey. Discharge measurements using the...
Estimation of Wave Power as an Energy Resource for Hawaii
One of the most important elements in determining the wave power available by means of a wave power extracting device is the amount of wave energy present at a given location during a...
Conceptual Design Analysis for Hybrid-Cycle OTEC Plants for Co-Production of Electric Power and Desalinated Water
Hybrid-cycle OTEC power plants are shown to be potentially the most flexible and cost effective in obtaining any specific mix of electrical power and desalinated water. This paper describes...
Model for Nonlinear Behavior of Bolted Joints Under Bending/Tension Loading
A mathematical model to predict the load-deformation relationship of single-bolted connections in wood structures subjected to bending/tension loading is described. The model accounts...
Evaluation of Bond Performance of Epoxy-Coated Reinforcing Steel Using Nonlinear Finite Element Analysis
The role played by epoxy coatings on the failure of standard beam-end specimens is explored. The specimen consists of a reinforcing bar embedded in concrete. As the bar is loaded, the...
Iterative Global/Local Finite Element Analysis
In spite of the advances in computer technology, there is still a need for more computationally efficient methods for performing stress analysis. One approach which is receiving increasing...
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