Assessing Long-Term Pollutant Concentration Trends in Urban Runoff for TMDL Planning and Regulatory Assessment
Loads of some pollutants in many urban watersheds include a substantial component originating with non-point sources and stormwater runoff. TMDL planning includes estimating those loads,...

Assessment of Water Quality Monitoring Sites by an Optimization Method
Allocation of sampling sites is the initial and the most crucial step of the water quality monitoring network design and redesign process. Several different approaches have been used within...

Impact of Ground Water Management on the Hydropattern of Wetlands
In this paper, we examine the effect of altering the pumping rates of a large municipal well field, on the hydropattern of the near by PENSUCO wetland. A flow model developed earlier using...

Rate of Under-Registration Due to Failures of Large Meters
Leaks and meter under registrations are suspected as primary components of unaccounted-for water in Korea. In 2001, national unaccounted-for-water rate is reported as 26.6%. More than...

Overall EWRI/ASCE Standards Process
The American Society of Civil Engineers is an ANSI-accredited standards development organization (SDO) and as such develops consensus-based standards in a wide-range of technical areas...

Characterization of Anaerobic Microbial Consortium Response to Thiol-Reactive Compounds
The activity of anaerobes in wastewater treatment processes can be limited when a toxicant enters the system. For certain toxicants, along with the decrease in metabolic activity, an efflux...

Replacing a Dying Water Infrastructure
The water infrastructure in the United States will soon need massive repairs. Pipes are leaking, and most pipes are near the end of their life cycles. Tens of thousands of sewer overflows...

Development and Application of a Decision Support System for Municipal Water Infrastructure Planning: Challenges and Successes
Many water utilities across the country continue to face the challenge of intelligent planning for cost effective, efficient operation, larger demands, stricter government regulations,...

The Pocono Creek Goals-Based Watershed Management Pilot Study-Phase 2
Phase 2 of the Pocono Creek Pilot Study begins with focusing on the issues identified in Phase 1 and prioritizing them on a watershed wide scale. The Pocono Project worked through the...

The Big Dig's Big Dig
Widely recognized as the most demanding component of Boston's Central Artery/Tunnel Project, the tunnel jacking work performed beneath operating rail tracks represents a quantum...

Advancing Under London
Bored tunnels account for more than 20 percent of the Channel Tunnel Rail Link, the high-speed rail line that will connect the Channel Tunnel with London upon its completion in 2007. In...

The Cyanic Threat
In the past terrorists have attempted to contaminate drinking water supplies in the United States with cyanide - one of the most lethal poisons known to man. So far they have been unsuccessful....

The Case for Cleaning
When sanitary sewer systems overflow during heavy rainstorms, the crisis is often attributed to the sheer volume of water inundating the system. In many cases, however, the lines would...

Wetlands at Work
As urbanization spread to the southern portion of Staten Island—the home of New York City's last large stand of freshwater wetlands—the New York City Department of Environmental...

Pressure Relief
When the two basins making up a 90 acre reservoir in New York needed to be emptied and cleaned, engineers decided to use the 2,750 ft (840 m) long concrete wall dividing them as a dam....

Transforming Crissy Field
The Presidio's Crissy Field in San Francisco has been converted from a military airfield and industrial storage yard into a magnificent urban waterfront park. Thanks to a...

Building the Olivenhain
Engineers in California were hired to create a reservoir capable of providing the San Diego region with 24,000 acre-feet of water during an emergency shortage. The result is the Olivenhain...

Tapping the Desert
As part of an effort to augment the limited supply of freshwater in El Paso, Texas, engineers and planners are eyeing a new source: desalinated water pumped from beneath the desert floor....

Closing the Loop
By constructing an enormous pipeline system and a new pumping station, the city of Irving will bring a new supply of water to the Dallas-Fort Worth region and improve the reliability of...

Water and Wastewater Seismic Vulnerability Assessment and Loss Mitigation Overview
The basic steps of a loss mitigation program for water and wastewater systems are briefly described in this section. These steps demonstrate how the checklists may be used to compliment...

 

 

 

 

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