Protecting the Source
The city of New York is engaged in a five-year, $1.5 billion effort to protect water quality in the upstate watersheds that are the source of its drinking water. Under the terms of a 1997...
Irrigation Method Selection Process
Intelligent selection of the irrigation method that best meets the goals and objectives of an irrigated agricultural development is of primary importance in the design process. A system...
Sprinkler Irrigation
In sprinkler irrigation, water is applied to the soil using a pressurized piping system with nozzles, jets, or perforated pipe that sprays the water into the air. These sprinkler devices...
Subirrigation: Water Table Management
Water table management (subirrigation) is accomplished by controlling the water table, usually through a subsurface drainage system. The crop is subirrigated with water being furnished...
Scour Monitoring at Johns Pass and Nassau Sound, Florida
Scour monitoring instruments were installed on two bridges spanning tidal inlets in Florida as part of a research project to develop scour instrumentation. Previous prototype installations...
Applicability of Scour Equations in Tidal Areas
Bridge scour and waterway instability in the coastal region where waterways are subjected to tidal flow can be subjected to mass density stratification, water salinity, sedimentation...
Best of Both Worlds
All around the Pacific Rim structural engineers are experimenting with concrete filled steel tubes as structural elements. The concrete filled tubes take advantage of the best properties...
Equalizing Wet Weather Flows
Sanitary sewer overflows and combined sewer overflows can wreak havoc on communities by flooding basements, contaminating drinking water sources and recreational water bodies, and flowing...
Banking on Bioengineering
Geoenvironmental engineers have traditionally used riprap to protect streambanks and river banks from erosion. In recent years, however, river regulators, permitting agencies, and county...
Wetlands Treat Mine Runoff
Engineers were asked to design a treatment system for the severely acidic drainage from the Mike Horse and Anaconda metals mines in Montana. Challenges included the mountainous terrain,...
Isolating the Arts
The LG Kangnam Building in Seoul, Korea, is a multi-use, 140,000 sq m project, consisting of a 40 story, 183 m tall office tower, an adjacent 9-story acoustically base-isolated performing...
Cold Climate Solution
To reduce turbidity in sedimentation-basin discharge, Anchorage, Alaska, is experimenting with constructed wetlands to augment storm-water discharge treatment from several storm-drain...
It's All in the Bracing
When the Massachusetts Bay Transportation Authority (MBTA) hired Weidlinger Associates Inc., Cambridge, Mass., to renovate the Aquarium Station stop along the subway system's...
High Rise Express (Available in Structural Engineering Special Issue only)
A new column system developed by the Canam Manac Group in Montreal offers the expediency of steel construction with the economy of concrete. The system is made entirely of lightweight...
Hyogoken-Nanbu (Kobe) Earthquake of January 17, 1995
Lifeline Performance
Prepared by the Technical Council on Lifeline Earthquake Engineering of ASCE. On January 17, 1995, the Hyogoken-Nanbu earthquake struck the Kobe, Japan,...
Overcoming Barriers
Lifeline Seismic Improvement Programs
Prepared by the Technical Council on Lifeline Earthquake Engineering of ASCE. This TCLEE Monograph studies seven large lifeline organizations that...
Early Warning System
The Rock Hazard Rating System (RHRS) can help highway owners mitigate the risks of rock slope failure. This system helps owners determine which slopes are most hazardous and should be...
Yesterday's Data�Tomorrow
Before the advent of computer-aided design (CAD) and geographic information systems (GIS), keeping documentation for future usage was no problem. All an engineer had to do was make sure...
The New Perspective on I.T.
In the last few years engineering firms have stopped seeing information technology as a support system and started looking at it as an opportunity to create new series. Through Web sites,...
Site Seeing
Project-specific Web sites (called project extranets) are used to communicate project information in a fast, cost effective and efficient manner. These Web sites act as a project's...
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