Reservoir Water Quality Modeling in Northern Portugal?Some Case Studies
In the last two decades environmental problems have become a major concern in Portugal as the effects of water pollution have gradually impaired the quality of water resources. Mathematical...
Statewide NPS Management Strategies
Statewide nonpoint source (NPS) management strategies are necessary because there are several different levels of authority involved, and the priority of action needs to be related to...
A Dual Level Methodology for Stormwater Detention Basin Design
A dual level design methodology for designing detention basins has been developed in an effort to standardize detention basin design and expedite the design/review process. The methodology...
Modeling Stormwater Basin Effects
This paper presents results of an extension to a study included earlier in these proceedings on the downstream accumulation effects of stormwater detention basins. The previously calibrated...
Simplified Design of Multi-Stage Outfalls for Urban Detention Basins
This paper presents a simple method for designing multiple stage outlets for detention basins. The method is based on formulas which were derived for the rational and modified rational...
Optimal Aquifer Management for Controlling Land Subsidence
This paper discusses on-going research in optimal regional aquifer management that has a multiplicity of goals: water supply, subsidence control, and energy management. Current research...
Water Quality and Hydrologic Characteristics of a Wet Detention Pond
A small wet detention pond was instrumented to determine treatment efficiencies. Annual loads showed a reduction from the inflow to the outflow for ammonia as nitrogen (39%), organic nitrogen...
International Air Transportation
A New International Airport
This proceedings,
Site Impact Traffic Assessment
Problems and Solutions
Transportation needs have traditionally derived from land use decisions. Site impact traffic analysis is a formalized process that attempts to quantify the need for transportation improvements...
Steering Clear of Tort Claims
Tort liability has become a major issue for today's highway engineer. Claims against state highway departments charging that deficient roadways caused or contributed to traffic...
OCEA, American-Style
A truly All-American contingent, the nominees for this year's Outstanding Civil Engineering Achievement award span the continental U.S., Alaska and Hawaii. The scope of the...
Design-Build Goes Public
Public owners of civil works get paid to avoid risk. It's their job. Why try some experimental technique for building offices when safe, proven methods exist? But times have...
Successful High Traffic Chip Seal Construction
Chip seal coats are used to extend pavement service life by reducing water and air infiltration and improving skid resistance. Application of chip seals is usually limited to low-traffic...
Consistency and Fairness in Geotextile Specifications
By clearly defining required material properties in terms of 'Minimum Average Roll Values' for routine quality control tests and 'Average Test Values in the Weakest Principal Direction'...
Realistic Specifications for Steel Bridge Painting
Specifications play a vital role in a steel bridge painting contract. They not only can ease problems with painting construction, but can also provide a common standard for all parties...
Proper and Improper Use of Specifications
The contractors have an obligation to the clients to provide a product that meets their requirements. In order to accomplish this, these requirements must be properly translated into the...
Improper Uses of Construction Specifications
Uses and abuses of construction specifications is a phenomenon discussed everywhere construction people gather. Issues addressed tend to be both general in nature, and project specific....
Bridge Deck Distress and Repairs
The primary cause of bridge deck deterioration are cyclic freeze-thaw exposures and reinforcing steel corrosion caused by the extensive use of de-icing salts. However, there are other...
From Sludge to Brokered Biosolids
At the end of June, a sludge filled barge pulled away from New York harbor for the last time. It traveled more than 100 mi offshore, where workers unloaded some of the 355 dry tons of...
Overhead and Profit on Change Orders
Have you ever wondered how many change orders it took to build the Egyptian pyramids or the Great Wall of China? The concepts of overhead, profit, and change orders have been around for...
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