Design of Filters for Clay Cores of Dams
The clay core of the Balderhead Dam Suffered cracking and internal erosion in 1967. Segregation of the eroded debris was observed and the filter failed to retain the finer particles that...

Analytical Approach to River Regime
Rational regime relationships for the width, depth and slope of a channel in equilibrium are developed using the Ackers and White sediment transport formulae and the White, Paris and Bettess...

Compression of Free-Ends During Triaxial Testing
When lubricated platens (free-ends) are used to load particulate media there is an associated error in any measured axial deformation due to compression and distortion of the rubber/grease...

Use of Cyclic Element Tests to Assess Scale Models
Large scale laboratory model tests have been performed to aid the design of offshore gravity platforms. The paper shows that undrained conditions, necessary for correct model simulation,...

Potential Flow over Weirs of Moderate Curvature
A review is given of some salient studies of critical flow over round-crested weirs, in particular Lenau's extension of Matthew's results. The basic equations...

Circular Voided Concrete Slab Stiffnesses
Finite element procedures for determining the plate bending stiffnesses of a circular voided slab are presented and the results are compared with those obtained from tests on model elastic...

Separation of Hydraulic Flow over Topography
The hydraulic flow of either a single layer or multiple layers of fluid over a topographic feature is frequently employed in many areas of civil engineering, meteorology, and oceanography....

Second-Order Wave Forces on Vertical CyLinder
Second-order diffraction effects are included in evaluating the maximum horizontal forces on a vertical cylinder under a second-order deep water progressive wave. For large cylinders,...

Prestressed Steel Grid Erected with Bent Forms
A new method for constructing one-layer steel grids erected by prestressing with the aid of recoverable bending forms is presented, followed by an approximate structural analysis. The...

Verification of Water Quality Models
The basic concepts of water quality models are reviewed and the need to recognize calibration and verification of models with observed data is stressed. Post auditing of models after environmental...

Design Approach to Dual-Power Aerated Lagoons
Completely- and partially-suspended lagoon cells are defined and their use in dual-power level, multicellular systems is discussed. A procedure is presented for the design of such systems...

Marketing Design and Construction Services
A survey of approximately ninety of the largest domestic professional firms engaged in process engineering design and construction, and of eighty of the largest clients of those services,...

Progressive Collapse of Rigid-Plastic Circular Foundations
The paper presents an analytical study of the behavior of a rigid-perfectly plastic circular foundation plate indenting an elastic two-parameter soil layer (Vlasov soil) under the action...

Impact of Inspector's Experience on Owner's Liability
Inspection of construction methods and procedures is a very important part of the total process of constructing a facility. This inspection is accomplished by the total efforts of the...

Field Tests of Long-Span Aluminum Culvert
A 28.5 ft (8.7 m) span, 17-ft 10-in. (5.4-m) high corrugated aluminum culvert was instrumented to obtain measurements of strain and displacement during backfilling and under static live...

Modeling Project Milestones: Dependent Activities
The current methods of project planning by network analyses and the assumed relationships between activity duration, cost, start date and risk elements are reviewed. The concept of modeling...

Nitrification Kinetics and Its RBC Application
The surface reaction model for the mechanism of mass transfer-metabolism in the fixed-film nitrification process is investigated and discussed for the design of trickling filter systems...

Graphical Method of Optimization: A Short Cut
Although optimization problems are usually solved by computer, argument is presented that simpler cases can be handled by non-computer methods. A new, graphical method based on triangular...

Synthetic Fabrics as Soil Filter: A Review
The fundamentals of fabric filters, their uses, design, longevity, strength requirements, and testing are reviewed and discussed. For unidirectional laminar flow conditions, particle retention...

Nuclear Fuel Cycle: Issues and Some Answers for the U.S.A.
The principal issues regarding nuclear power center on reprocessing and recycling of spent fuel, deployment of breeder reactors, and waste disposal. Analysis of future energy needs using...

 

 

 

 

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