Threats to Bridge Stability from Scour Related Failures of Drop Structures
Catastrophic failure of bridge foundations may occur when channel bed elevations are lowered unexpectedly. Bridges to be constructed in channels that are known to have bed degradation...
Prediction of Filtrate Turbidity by Parameter Estimation
In order to operate the rapid sand filter in response to the time variation of effluent quality, a model and a procedure to predict the filtrate quality of rapid sand filters have been...
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...
Friction Loss Equations for Hydropower Facilities
Many water suppliers are pursuing economic benefits from water supply and distribution systems through development of hydropower facilities on pipelines. Excessive pressure head that used...
Roll Waves in Mud Flow
Permanent roll waves on a shallow layer of fluid mud which is modeled as a power-law fluid is studied. Based on long-wave approximation, momentum integral method is applied to derive the...
Comparisons Between Experimental and Numerical Studies on Laminar Flow with Tracer Transport
In this paper we present an experimental and an accompanying numerical study of two- and three dimensional transient flow and tracer transport in complex flow systems at low Reynolds numbers....
An Optimization Approach to River Adjustments
The adjustment of alluvial channels is presented here as a non-linear optimization problem in which the ideal channel will tend to adopt an optimum configuration subject to the imposed...
An Improved Method for Measuring System Performance of Hydraulic Infrastructure Systems
Due to the public awareness of the importance of functioning of hydraulic infrastructure systems and the serious consequences caused by their failure, many researches were undertaken to...
Practical Comparison of One-Dimensional and Two-Dimensional Hydraulic Analyses for Bridge Scour
The Kentucky Transportation Cabinet, Department of Highways is working with the Indiana Department of Transportation and the Federal Highway Administration to plan, design, and construct...
Prediction of Occurrence and Runoff Analysis of Debris Flow
A debris flow will occur on a slope when the rainfall exceeds a certain value determined by the hydraulic, geological and topographic properties of the slope. To estimate this critical...
The Concept of Local Euler Number as an Aid for Sizing Pitot Tubes
Correlations with drag coefficients enable determining the relations between the form of Pitot tubes and their velocity coefficients. A numerical example is presented to clear the use...
Design of a Curved Baffle Energy Dissipation Structure
A curved baffle energy dissipation structure was designed and constructed based on the results of hydraulic and analytical models. Field tests of the prototype demonstrate close comparison...
Hydrologic Design: Extending Traditional Methods
A review of traditional hydrologic design shows that it is inadequate. The continued adaptation of manual techniques into computer software without a major change in fundamental assumptions...
Progressive Failure of an Overtopped Embankment
The failure of an overtopped embankment is a problem of a very complicated nature. Concerned organizations are interested in information that can be used in future planning and development...
A New Type of Concrete Trapezoid Dam
A new type of 128.0 m height concrete trapezoid dam (t-d) has been built for the Wunana Town Hydroelectric Power Station (WTHPS). The paper presents its optimum section design, several...
Galveston Bay 3-D Model Study Channel Deepening Lessons Learned in Management of a Large Modeling Study
The numerical modeling of Galveston Bay in 3-D for long time durations with many geometry and hydrologic scenarios, coupled with the need to store all data for subsequent use in a model...
Reference Surfaces for Bridge Scour Depths
Depth of scour is measured as the vertical distance between scoured channel geometry and a measurement reference surface. A scour depth measurement can have a wide range depending on the...
Probability of Bridge Failure Due to Scouring
Models to estimate depth of scour at bridge piers and abutments are available in many forms,but all of them are based on constant discharges. Their results vary widely and engineering...
Uncertainty of Bridge Scour Estimates
Pier scour is the erosion of a streambed in the vicinity of bridge pier foundations. In this paper, fuzzy regression is used to develop two pier scour models, one based on crisp laboratory...
Uncertainty Analysis of the FEMA Method for Alluvial Fans
Distributary flow areas such as alluvial fans, bajadas, and alluvial slopes, and alluvial plains along mountain bases pose quite different and interesting problems for the design of hydraulic...
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