Incipient Motion in Gravel-Bed Rivers
Incipient motion processes are reviewed for bed material in gravel-bed rivers. Prediction difficulties are identified. Research results are reported for field and flume studies to investigate...
Flow and Scour Near an Abutment
Laboratory experiments were used in conjunction with a two-dimensional depth-averaged numerical flow model, RBFVM-2D, to investigate the relationship between flow velocity distribution...
Computation of Flow Past a Cylinder Mounted on a Flat Plate
The surface shear stress distribution in the vicinity of a circular cylinder - mounted normal to a rigid flat plate - produced by the three-dimensional flow past it, is investigated numerically...
Velocity Downstream of a Submerged Pipe Outlet
The velocity downstream of a submerged pipe outlet was examined in time and space. A model study was performed to examine the influence of boundary roughness changes on the velocity dissipation....
Shape Effect on Bed-Load Transport in Pipes
The nature of part-full flows in pipe sewers produces different channel shapes resulting in non-uniform shear stress distribution on the wetted perimeter. New experimental data were utilized...
Numerical Modeling of Unsteady Compound Channel Flow
The unsteady open channel flow equations describing conservation of mass and momentum (St. Venant equations) are integrated numerically to determine the depth of flow and the rate of discharge...
Hydraulic Modeling of Fish Screens
Hydraulic model studies coupled with available knowledge of fish behavior can be important component in the development of fish-screening systems. To reproduce in a model the flow field...
Wind Induced Circulation in Shallow Lakes
Clear Lake is a relatively shallow lake in Northern California. Natural flows are small but at times they do transport heavy metals into the lake. In order to predict water quality constituent...
Bed Shear Stress in Unsteady Open-Channel Flows
In this study, velocity distributions over smooth and rough beds were accurately measured with an LDA in unsteady open-channel flows. The log-law distributions yielded well in the wall...
Acoustic Doppler Current Profiler for Inlet Current Measurements
A BroadBand Acoustic Doppler Current Profiler (BroadBand ADCP) was used to survey tidal currents at Shinnecock and Moriches Inlets, Long Island, NY. Measurements were made remotely form...
Turbulent Velocity Flutuations in Natural Rivers
The longitudinal and transverse components of flow velocity, as well as the normal and tangential stresses, must be expected to fluctuate with time and space when flow at a high Reynolds...
Time-Dependent Landslide Probability Mapping
Case studies where time of failure is known for rainfall-triggered debris flows can be used to estimate the parameters of a hazard model in which the probability of failure is a function...
Rainfall Depth-Duration-Frequency Analysis for Major Cities in Taiwan
The annual series of extreme rainfall amounts for various durations are compiled. The statistics such as mean, standard deviation, coefficient of variation, coefficient of skewness, and...
A Simple Finnish Method for the Structural Fire Design of Composite Structures
The structural fire design of composite structures in Finland has previously been based on furnace tests, which are expensive and take too much time to arrange. With the increasing prominence...
Issues in GIS-Based Subsurface Data Management
Obstacles and barriers preclude an interagency GIS application for managing spatially-related subsurface data. Such a system would enable geotechnical and earthquake engineers from state...
Infrastructure Damage Modeling with GIS
This paper describes the use of a geographic information system to model damage to a municipal water distribution system. In a demonstration application detailed attribute data on components...
State of the Art in Spatial Data Transfer: FIPS 173
This paper provides an overview of Federal information processing standard (FIPS) 173. FIPS 173 is a comprehensive spatial data transfer standard that provides solutions to the problem...
Accessibility of Geotechnical Earthquake Engineering Data and the Need for Data Storage and Dissemination Standards
Ease of data access and data standards are two issues critical to the success of GIS technology when applied to earthquake hazards research problems that require geotechnical engineering...
Towards a Common Data Exchange Format Between Geographic Information Systems
To make their respective geographic information systems (GIS) software packages more useful to the user community, the GIS software vendors have steady added various database translators...
Image Enhancement: Application to Geotomography
Image enhancement complements geotomographic reconstruction in the rendering of better images. In this paper, available image enhancement techniques are reviewed. Emphasis is given to...
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