Seasonal Water Quality Management Given Sparse Data
An approach for designing robust seasonal water quality management programs for river basins with sparse or short flow records is presented. This approach uses Markov chain modelling and...
A Methodology for the Evaluation of Global Warming Impact on Soil Moisture and Runoff
Global warming is expected to increase the intensity of the global hydrologic cycle. Precipitation and temperature patterns, soil moisture requirements, and the physical structure of the...
A Planning Strategy for Safe Drinking Water Act Compliance
This paper presents a simple planning strategy for drinking water utilities that will allow them to move ahead with system upgrades and specific regulatory compliance programs even though...
Investigation and Rehabilitation of the Moses Lake Larson Wellfield
In 1988, low levels of trichloroethylene (TCE) were detected in several of the Larson wells operated by the City of Moses Lake. The wells are up to 800 feet deep and are completed in fractured...
Optimum Operation of Recharge Basins
Mathematical models based on nonlinear programming are developed for operating recharge basin systems. The objective of these optimization models is to determine the operation policy that...
Strategies for Developing Major Capital Facilities
Siting, permitting, and mitigating impacts present many challenges during the development of major capital facilities. As a result of the need for public involvement, environmental review,...
The West Point Story?Chapter 1: Overview and Planning
The West Point wastewater treatment plant is the Seattle metropolitan area's largest wastewater treatment plant, and it is being upgraded to provide secondary treatment. The planning,...
The West Point Story?Chapter 2: Project Management Approach
In 1985, serving as the program lead, Metro contracted with Lewis Zimmerman Associates to conduct a formal facility planning effort for the West Point wastewater treatment plant. It was...
The West Point Story?Chapter 3: An Integrated Park and Treatment Plant
The West Point Wastewater treatment plant in Seattle sits on a small parcel of land that juts out into Puget Sound. In 1984, controversy erupted when Seattle Metro recognized that West...
The West Point Story?Chapter 4: Design
Metro's approach to design was one of integrated environmental and plant design. The project team, with guidance from the community and the city's parks department, established goals before...
The West Point Story?Chapter 5: Construction
As design of the West Point plant neared completion, the municipality of Seattle addressed construction of the facilities. The challenge was to build a complex wastewater treatment plant...
Low Flush Plumbing Fixtures and Wastewater Systems
The significance of low flush plumbing fixtures on the wastewater collection and treatment system serving a small community has been determined. Among the concerns studied were: functional...
Use of a Statistical Model to Forecast Future Wastewater Flows
Future wastewater flows are generally predicted based upon an assumed rate of population and industry growth within a treatment facility's area of influence. In a community with limited...
Challenges in Implementing the Use of Reclaimed Water
The State of Washington is currently in the process of adopting standards for use of reclaimed water on land. CH2M HILL recently has finished two feasibility level studies for reuse projects...
The City of Los Angeles Gray Water Pilot Project Shows Safe Use of Gray Water is Possible
A year-long study of eight residential gray water systems was conducted in the City of Los Angeles. Soils irrigated with gray water were compared monthly with soils irrigated with municipal...
Bellingham Frozen Foods Spray Irrigation System Operations
Bellingham Frozen Foods is a major vegetable processor located in northwestern Washington state. During the mid-1980's, the city of Bellingham began to upgrade the treatment of wastewater....
Implementing a Watershed Plan for Lake Stevens
The water quality of Lake Stevens is declining because of watershed nonpoint pollution and cycling of nutrients from lake sediments. Hypolimnetic aeration and an alum treatment are proposed...
Design of Aquatic Treatment Systems
This paper describes the design parameters and operating procedures used for a nonpoint pollution/stormwater treatment facility known as an Aquatic Treatment System to be located in the...
Storage/Treatment Isoquants for CSO Control Planning
A quantitative procedure which identifies the technically efficient combinations of storage volume and treatment rate necessary to achieve various levels of combined sewer overflows (CSO)...
The Kettering Community Demonstration Project Non-Point Pollution Control and Environmental Enhancement Program
With the advent of the U.S. EPA's municipal/ industrial NPDES and Coastal Zone Management programs the development of effective non-point pollution control programs has become the most...
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