Grouting to Great Depths
Logan Martin dam on the Coosa River in Alabama has been plagued by underseepage since its construction in 1964. The karst forming the dam's foundation allows water to flow...
Making a Map of Public Health Hazards
Accurately deducing the long-term exposure of community members to health hazards has always been a challenge for engineers. In 1993, the town of Somers, Conn., discovered a residential...
Grand Gusset Failure
In May 1996, structural failure forced the closure of twin 850 ft long arched truss bridges, each carrying two lanes of interstate traffic over the Grand River, 30 mi east of Cleveland....
Energy and Water
Sustainable Development
This proceedings,
Environmental and Coastal Hydraulics
Protecting the Aquatic Habitat
This proceedings,
Communication Breakdown
Are modern telecommunications networks vulnerable to earthquakes? Researchers say yes, and have developed a computer tool to quantify potential economic impacts. Telecommunications service...
Anatomy of a Wetland
The U.S. Army Corps of Engineers, which administers Section 404 of the Clean Water Act, requires replacement of wetlands impacted by construction. A constructed wetland in Georgia demonstrates...
Water Wisdom of the Ancients
Two water systems thousands of years old--the falaj system in Oman and China's Dujiangyan water works--are still in use today. A climatologist describes how these systems...
Telling Florida's Water Story
The latest addition to the nation's family of aquariums is Tampa's recently completed Florida Aquarium. The $84 million 152,000 square foot cast-in-place concrete...
Ground-Water Treatments Gain Ground
Ground water is the main source of the nation's public water supplies and is also used extensively for agricultural and industrial purposes. Yet our reserves are constantly...
Spawning a Hydroelectric Plant
A hydroelectric facility which utilizes fishway attraction water on the Columbia River between Washington and Oregon will tap a neglected source of power and save many endangered fish...
Financing the Future of Storm Water
For Sarasota County, Fla., draining storm water no longer means draining municipal funds. By establishing a modern storm-water utility, the county has provided a dedicated funding source...
Boston's Third Harbor Tunnel (Available only in
Boston's immersed marine tube, the Third Harbor Tunnel, connecting South Boston and Logan Airport, is a $226 million component of the multi-billion dollar Central Artery/Third...
Blasting Densifies Volcanic Debris (Available only in
The relatively new ground improvement technology of blast densification overcame soil problems posed by volcanic ash at Mount St. Helens National Volcanic Monument. In 1993 WSDOT began...
A New Direction in Remediation
Engineers have always had to rely on wells for onsite soil and ground water remediation systems. During the past several years, horizontal drilling technology, adapted from oil recovery...
Start the Presses!
Turning an existing bleach manufacturing facility into a printing plant required careful structural design to support a wide range of production processes. The new Daily News facility...
Leachate Chemistry: Its Implications for Clogging
The clogging of leachate collection systems is controlled by interrelated mi and chemical phenomena. Mesocosms containing landfill materials and simulating leachate collection were infiltrated...
Potential Microbial Impacts on Groundwater Quality
Over the last decade there has been significant progress in the understanding of sub-surface microbiology. The ubiquity of microorganisms within groundwaters forms a major part of these...
Application of One- and Two-Dimensional Flow Models for an Evaluation of Riverine Wetland Hydrologic Functions
Preservation and restoration of wetland habitats require maintaining a desirable hydrologic regime. The criteria for such a hydrologic regime are established based on marsh inundation...
Hydraulics of Subsurface Flow Constructed Wetlands
Resistance to flow through subsurface flow wetlands is described by Darcy's law or by Ergun's equation. Both representations are combined with the continuity...
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