A Comprehensive Algorithm for Network Calibration
An explicit calibration algorithm is proposed which provides the direct and rapid adjustment of the pipe roughness coefficients and junction node demands that exactly meet a specified...

A Kinematic Hardening and Softening Model of Concrete
In the present paper, a new loading surface calibrated by several typical uni- and multi-axial test curves is proposed. Following the associated flow rule, a relatively simple constitutive...

A Calibrated Longshore Transport Model for Richards Bay
In order to plan maintenance dredging at the Port of Richards Bay, different studies were carried out. These were to determine the extreme dredging rates required in the long term and...

UCD Drag Plate Lysimeter—Momentum and Mass Transfers
The second large (6.1 m dia., 0.97 m deep) lysimeter built at the University of California, Davis (UCD) was largely the brainchild of Dr. F.A. Brooks, the initial Project leader of a U.S....

Informed Use and Potential Pitfalls of Canal Models
Numerical models of unsteady flow in canals are used in the design, analysis and operation of irrigation canal systems. Their informed use requires knowledge of the potential pitfalls,...

Common Mistakes in Model Applications
To apply models to groundwater problems, the hydrologist generally uses the following three-phased approach: (1) system conceptualization, (2) history matching (or model calibration),...

Improved HSPF Infiltration Calibration Procedure with a Linked GIS
A research project for the Florida Institute of Phosphate Research sought to develop an easy-to-apply integrated surface drainage model, HSPF, and groundwater model, MODFLOW, with a geographic...

Uncertainty Quantification in Water Distribution Parameter Estimation
Calibration for water distribution system model parameters is usually undertaken with a minimal amount of field measurements so additional pseudomeasurements are assumed. Both the actual...

Calibration of Beni-Mazar Movable Bed Model
A sand-bed model representing a reach of the Nile River was constructed to study alternative solutions to maintaining the navigation channel. Flume tests were carried out first to determine...

Lysimeters for Evapotranspiration and Environmental Measurements
Lysimeters have been used extensively in the past to provide baseline information for development, calibration, and validation of evapotranspiration methods. This proceedings, Lysimeters...

In-Situ Calibration of USGS Piezometer Installations
Among the few potentially liquefiable sites around the world that have been permanently instrumented with pore-pressure transducers and accelerometers, only the Wildlife Site in the Imperial...

Traffic Queue Detection Using Image-Processing
A method of queue/congestion detection is described using low cost image processing and computing hardware. It is capable of processing data from a length of roadway within a few seconds,...

Measurements to Calibrate Suspended Sediment Model for Adsorbed Contaminant Transport Study of North Fork Holston River, Virginia
A daily suspended sediment (SS) and mercury transport model was developed for a 25-mile reach of the North Fork Holston River below Saltville, Virginia. Daily streamflow measurements;...

Sediment Budget at Oceanside, California, Calculated Using a Calibrated Shoreline Change Model
A quantitative sediment budget analysis was made for the shoreline segment extending from 4 miles north to 4 miles south of Oceanside Harbor using a calibrated shoreline change model....

Hydraulic Weighing Lysimeter Measurement Errors
A prototype size lysimeter was studied in the laboratory to determine accuracy and sources of error that might be caused by variable pillow contact area, temperature changes in various...

Penetration Tests in a Particulate Calibration Chamber
A numerical technique which couples discrete element method with boundary element method has been developed to simulate a two dimensional particulate assembly. Soil particles in the near...

Modeling 70,000 Feet of Interceptor for Aurora, CO
During preliminary design for the City of Aurora's Tollgate Creek Interceptor Sewer Improvements, the authors modeled over 70,000 linear feet of interceptor for both present...

Background Studies for the Determination of Strength Functions in Eurocode 3—Design Rules for Steel-Structures
At present common unified rules for the design of Civil engineering structures are being prepared on the initiative of the Commission of the European Communities. Eurcode 3, which gives...

Minimizing the Risk of Unsuccessful Modeling Exercises
Monte Carlo simulation techniques were employed to relate input parameter uncertainties to the characteristics of model output accuracy and reliability, and to the probability of successfully...

Calibrating the Chesapeake Bay Water Quality Model
A eutrophication model comprised of twenty-two state variables including three algal groups and multiple species of carbon, nitrogen, phosphorus, and silica is described. Equations governing...

 

 

 

 

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