National Water Quality Assessment: Moving from Measurement to Understanding
The USGS National Water Quality Assessment (NAWQA) program began in 1991. The objectives of the program were to characterize the quality of the Nations ground and surface water, assess...

Shape of Storm Pollutograph from the Four Different Rural Watersheds
(Abstract only) Just as a hydrograph describes the flow rate of water for a storm event, a pollutograph shows the rate at which pollutants dissolved or suspended in the runoff are transported....

Implementation of the Phase II Stormwater NPDES Permits
In the 1987 amendments to the Clean Water Act, Congress directed the United States Environmental Protection Agency (EPA) to establish a permitting framework under the National Pollutant...

Probabilistic Simplified and Detailed Subsurface Drainage Water Quality Modeling of Nitrate Leaching
A transparent uncertainty structure is derived for simplified and detailed conceptual nitrate leaching as a result of a probabilistic modelling procedure. The uncertainty structure consists...

How the Impacts of Urbanization Are Being Addressed in the Los Angeles River Watershed
Due to an increased interest and concern about the Los Angeles urban environment, studies have begun to focus on the local water cycle and the impact of impervious land on the Los Angeles...

Revised Operation of a Dam and Reservoir to Achieve Environmental Objectives
Alamo Dam and Lake are located in the State of Arizona in the western part of the United States of America. The dam is located 62.8 km (39 mi) upstream (east) from the rivers confluence...

Tamarack Managed Groundwater Recharge Project
A managed groundwater recharge project was begun in the Fall 1996 at the Tamarack Ranch State Wildlife Area (SWA) owned by the Colorado Division of Wildlife near Crook in northeast Colorado....

Hydrogeology and Irrigated Agriculture
A review of drainage problems and groundwater processes on the west side of the San Joaquin Valley (SJV), California, provides useful perspectives on hydrogeology and irrigated agriculture....

Spatial Decision Support System for River Basin Management
MODSIM is a generalized river basin network flow model designed to simultaneously assure that water resources are allocated according to physical, hydrogeological, and institutional/administrative...

Rain and Gray Water Reuse Systems: The Hazard of Legionaries Disease
The Legionaries Disease is being more and more diagnosed. This infectious disease occurs when humans come in contact with the aerosol of contaminated water. The body of knowledge is growing...

Application of Simulated Annealing for Integrated Urban Water Systems: Infrastructure, Treatment and Re-Use Optimization
Escalating costs in providing water supply, waste water and storm water infrastructure and community concerns over the environmental impact of water harvesting and effluent disposal, have...

Rediscovering the Lost City
Since 1994, Kenneth R. Wright, P.E., of Wright Water Engineers, in Denver, has been studying evidence of civil engineering at the ruins of Machu Picchu—an ancient Inca city in the Andes...

Tunnel with Vision
Two tunnel boring machines that are being used to bore a pair of 6.6 km long tunnels under the Westerschelde estuary in the southern Netherlands must dig through loose sand and sticky...

Tied by Water
Water utilities in the Puget Sound region of Washington State face strict water quality standards and increasing water demands. Because of the Endangered Species Act, they are also under...

Water In, Water Out
Moving water into and out of the Eastside Reservoir, which will be the largest body of freshwater in southern California, requires some of the largest pumping and water conveyance systems...

From Pikes Peak to Mars
A graywater (sink and shower wastewater) reuse system is now being designed to serve a visitors' center and a nearby laboratory atop Pikes Peak, Colorado. If the Pikes Peak...

Application of Water Column Dampers to Control Motions of the Wall Centre, Vancouver
The Wall Centre, a 450 foot tall high-rise tower currently under construction in downtown Vancouver will be the highest building to be constructed in that city. Wind tunnel testing indicated...

Existing Urban Public Transportation System and Its Operations and Usage
In Osaka City, a new urban center was developed in the waterfront area to decentralize the excessively concentrated business activities. In order to connect the newly developed center...

Mississippi Diversion
The $103-million Davis Pond freshwater diversion project in coastal Louisiana will divert up to 10,650 cfs (300 m³/s) of Mississippi River water to the Barataria Bay Estuary through four...

Digging for Answers (Available in Geoenvironmental Engineering Special Issue only)
Research at the six facilities that make up the National Geotechnical Experimentation Sites (NGES) has included tests on minipiles, groups of driven piles, shafts drilled in rock, and...

 

 

 

 

Return to search