Seismic Cutoff
The John Hart Dam, which is a 40-year old dam in British Vancouver, Canada, has been rehabilitated to meet current seismic codes. BC Hydro, the utility that owns the dam, conducted a study...
Aeration
A Wastewater Treatment Process
This manual summarizes current aeration practices in wastewater treatment, and includes both theoretical and practical guideline for the design and operation of such unit processes. The...
Water-Quality Ponds ? Are They the Answer?
Water-quality 'wet' ponds have been proposed to treat storm water for the removal of phosphorous in streams tributary to Cherry Creek Reservoir, a major recreational...
Multiple Treatment System for Phosphorus Removal
Detention ponds, wetlands, and infiltration basins have each been shown to reduce constituent loads carried by urban stormwater, including phosphorus. Design recommendations are presented...
Swirl Concentrators Revisited. The American Experience and New German Technology
The Swirl Concentrator is a small, compact, 'no moving parts' solids separation device. Its function is to act as as a static combined sewer overflow (CSO) regulation...
Long-Term Effects of Urban Stormwater on Wetlands
In 1986 scientists and managers associated with local, state, and federal agencies that have wetland protection and stormwater management responsibilities in the region joined to consider...
Systems for Artificial Recharge of Ground Water
Design and management of infiltration systems should be adapted to local conditions of water quality, climate, soil, hydrogeology, and environmental constraints. Aspects to be considered...
Ground Water Recharge and Management Under the Small Reclamation Projects Act
The U.S. Bureau of Reclamation through its Small Reclamation Loan Program is providing needed Federal financial and technical assistance to water users in Southern California to help ease...
Artificial Recharge Research at the University of Arizona
This paper summarizes pit- and well-recharge trials at Tucson, Arizona. The pit recharge trials examined management techniques and characterized flow patterns in the 80 ft thick vadose...
Aquifer Storage Recovery: A New Water Supply and Ground Water Recharge Alternative
Aquifer Storage Recovery (ASR) involves treated drinking water that is stored underground by injection into a suitable storage zone during those months of the year when available supply...
Tucson Recharge with Existing Potable Water System
In 1987, a study was undertaken to evaluate the potential for using the City of Tucson's existing potable water distribution system and production wells for recharge of treated...
Ground Water Recharge with Sewage Effluent
Recharge systems for soil-aquifer treatment (SAT) of conventionally treated sewage effluent typically remove essentially all suspended solids, biodegradable material (BOD) and microorganisms...
Analysis of Hydraulic Impacts at the Tucson Reclaimed Water Recharge Project
The Tucson Reclaimed Water Recharge site has been implemented with increasingly sophisticated calculation methods as data collection efforts advanced. Initial project scoping utilized...
Reclaimed Water System with Artificial Recharge
Arizona cities must reduce water consumption as a result of the 1980 Arizona Ground Water Management Act. Use of reclaimed water in place of potable water for landscape irrigation and...
Wastewater Recharge: Water Quality and Operations
The Green Valley Wastewater Treatment Facility began operations in its current configuration in 1981. It treats approximately 1 million gallons per day of municipal wastewater, with disposal...
Artificial Recharge of Urban Storm-Water Runoff
The disposition of selected contaminants in the soils, in the percolating water, and in the recharge-mound water of five retention/recharge basins was investigated in Fresno, California....
Bacterial Fingerprinting to Trace Source of Coliform Bacteria During Artificial Recharge
This report describes the use of a bacterial 'fingerprint' technique to determine if treated effluent from infiltration beds was the source of coliform bacteria...
Health Effects of Ground Water Recharge
A five year multidisciplinary research project was conducted to evaluate the health significance of using treated wastewater for ground water replenishment. The focus of the study was...
Benefits and Risks of Artificial Recharge of Saline Aquifers
Artificial recharge of saline aquifers by deep well injection of treated effluents is attractive, as it provides a solution to an environmental problem, and possibly creates groundwater...
Ground Water Recharge Through Excavated Basins
Excavated basins were used to bypass slowly permeable soils in the Southern High Plains and artificially recharge the Ogallala aquifer. Recharge rates with turbid playa water were as rapid...
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