Low-Head Air Regulated Siphons
Air-regulated siphons have significant advantages over blackwater siphons: (1) They discharge over a wide flow range with minimal change in upstream water level; and (2) they are self-regulating...

Optimum Dredged Depth in Inland Waterway
Criteria for optimum depths in the inland waterway network is minimized value of the sum: cost of tow industry plus cost of waterway structures, in the open rivers mainly cost of dredging....

The Forgotten Engineer: John Stevens and the Panama Canal
John Frank Stevens was appointed by President Theodore Roosevelt in 1903 to take over the flagging Panama Canal project when John Wallace quit. Stevens had been an outstanding railroad...

Floating Dry Dock Doubles as Launching Platform
Though usually constructed by shipyards, floating drydocks are civil engineering structures. Dry docks that float have one important advantage over their non-floating relatives — they...

The Sinking of the Amsterdam Metro
Subway construction was not practical in Amsterdam, The Netherlands, until this new placement technique. Most of the buildings in Amsterdam rest on old, untreated wooden piles that would...

Mass Transport and Mean Water Level

Water-Table Fluctuation in Response to Recharge
Analytical expressions are developed which describe the rise and fall of the water table in an extensive unconfined aquifer receiving localized vertical recharge and discharging into a...

Integrating Water Quality and Water Resources Planning
Technical, behavioral, and institutional constraints have hampered the integration of water quality and water resources planning. Although the conceptual relationship between water resources...

Project Planning and Scheduling: Unified Approach
Essential logical details are explained for a procedure that integrates two important network-based project management techniques: (1) resource allocation; and (2) time-cost trade-off...

The Boundary of the Sovereign
The mean high water mark has for many centuries been the boundary between public and private lands, its origin is based on natural phenomena and law, it is an extremely fair and impartial...

Automated Formulation of Condition Equations
Least squares adjustment of a leveling network entails formulating a set of simultaneous equations, solving those equations, and calculating point elevations based on the solution. The...

Model Tests with Thin Sheets to Reduce Evaporation
Laboratory physical studies have been used to determine the evaporation coefficient for a circular sheet such as a physically separate barrier suspended over the water surface. The circular...

Functions to Predict Effects of Crop Water Deficits
A well-advanced research program is aimed at quantitative prediction of relations between principal crops and water. Goals are to: (1) estimate functional relations between crop yield...

Legal Constraints on Urban Water Systems
Strategic level decisions regarding urban water management are largely political, whereas tactical level water decisions are mostly administrative. Both are subject to legal constraints....

Optimum Groundwater Level Decline in Eastern Washington

The Undersea Aqueduct—A New Concept in Transportation
Growing imbalances between available water sources and growth areas requiring large volumes of high quality water lend a new urgency to the need for exploring alternatives for transporting...

Barometric Leveling Analysis
Barometric leveling, a fast and relatively inexpensive surveying technique used for determining elevations of ground stations to an accuracy of ± 3-5 ft, is a valuable tool for use in...

Behavior of Wharf Affected by River Fluctuations
Fluctuations of water levels in the Houston Ship Channel caused movements and some structural damage to a pile-supported wharf constructed in overconsolidated plastic Pleistocene clay....

Measurements of Turbulence in Water at High Velocity
Hot-film turbulence measurements in water flow have been carried out by many investigators. However, all of these measurements were conducted at low velocities. The present study measurements...

Surface Disturbance from Submerged Jet
A submerged vertical jet of water impinging on a free surface produces a disturbance at the still water level. The disturbance height and other characteristics of the surface profile depend...

 

 

 

 

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