Investigation of Daily Flow Forecasting Models
Two types of models for forecasting daily flows from a basin are investigated. These model types are a segmented model whose components are multi-input linear models of the basin between...

An Alternative to the Peripheral Canal
The present mode of water transfer through the Sacramento—San Joaquin Delta is not adequate to meet both future export requirements and maintain desired water quality. A 42-mile long Peripheral...

Elasto-Plastic Settlement of Rigid Footings
A simple method of estimating elasto-plastic settlement of circular or annular centrally loaded footings is presented. The method incorporates the elasto-plastic behavior manifested through...

Piping Potential of Weak Zones Under Concrete Dams
A method is presented for evaluating the piping potential of shear zones crossing the foundation of a concrete dam from upstream to downstream. The steps described for this method involves...

Interaction of Soil and Penetration Projectile
The motion of a terradynamic penetrator is formulated, and some interaction characteristics as the added mass and the interaction pressure distribution are calculated. The magnitude of...

Optimum Depth and Spacing of Subsurface Drains
Optimization theory is used to minimize the cost of installation of subsurface drainage systems. The optimization problem is presented and constraints are identified. The analytic solution...

Interaction of Cable Roofs with Support Structure
Tensioned structures are becoming increasingly popular for covering large column free areas on account of efficient utilization of construction material, speedy construction and economy....

Estimation of Small-Scale Hydropower Potential
A statistical method of determining installed capacity and energy yield of potential small-scale hydropower sites is explored. Thirty watersheds with existing reservoirs were selected...

Improvement of Swirl Concentrator
The analysis of a treatment device for pluvial water, proposed by the American Public Works Association (APWA) and called a swirl concentrator, shows that its efficiency greatly depends...

Total Suspended Solids in Highway Runoff in Washington State
During the first year of full-time operation of ten highway runoff monitoring sites in the State of Washington, a total of 241 storms were sampled with a composite sampling system developed...

Microbial Activity in Activated Carbon Filters
To obtain information on the adsorption, bacteriological oxidation and desorption processes in filters, the oxygen consumption (ΔO2) and the removal...

Sewers and Cities: France and the United States Compared
The development and impacts of wastewater systems in France and the United States and their application for developing countries are discussed. Watercarriage technology was adopted in...

Algorithm for Optimal Activated Sludge Operation
A method for determining the minimum cost operation of an activated sludge wastewater treatment plant is developed and applied to a plant in Erie County, New York. The plant includes an...

Role of Surface Active Media in Anaerobic Filters
Equal-sized activated carbon and anthracite coal were compared when used as packing media in completely mixed anaerobic filters. Synthetic glucose and phenol bearing solutions and a diluted...

Rotating Biodisks Recarbonate Alkaline Wastewater
Lime addition to raw wastewater as an upgrading technique can significantly aid a rotating biological contactor (RBC) plant in producing effluents in compliance with federal discharge...

Anerobic Treatment in Novel Contact Digester
Laboratory studies are presented on a combined jet gas mixed and sludge blanket anaerobic contact digester with continuous sludge recycle. Raw piggery waste substrate is used as feed with...

Pharmaceutical Waste Treatment by Anaerobic Filter
The anaerobic filter has been used on a laboratory scale to treat a variety of industrial wastewaters. The process was known to be effective at treating fermentation pharmaceutical wastes...

1980 Needs Survey: Combined Sewer Site Studies
The U.S. Environmental Protection Agency is mandated by the Clean Water Act to prepare and report to the Congress a biennial estimate of the construction cost for publicly owned wastewater...

Models of Landfill Leaching: Moisture Flow and Inorganic Strength
Mathematical models are applied to the movement and inorganic contamination of moisture in sanitary landfills situated above the water table. The models are based on simple well-mixed...

Models of Landfill Leaching: Organic Strength
Mathematical models are applied to the dissolution, transport, and decay of organic materials in unsaturated sanitary landfills. The models are based on cascaded reactor concepts and on...

 

 

 

 

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