Design of Final Covers for Landfills
Final covers or caps are incorporated into a completed landfill to limit the amount of moisture percolation through waste materials. A properly designed final cover system provides the...
Unit Operations Approach in Exposure/Release Evaluation for New Chemicals
The unit operations approach may also be applied to the estimation of potential exposure and release of toxic materials from the manufacture and/or processing of new chemicals. By characterizing...
Multiple-Hearth and Fluid Bed Sludge Incinerators
This paper presents recommended practices for design and operation of multiple-hearth and fluid bed furnace systems for combustion of sludges in order to eliminate or mitigate the problems...
Models of Organics Transport Through Soil Columns
A mathematical model is proposed for the transfer of organic solutes in soil. Two cases are considered namely transport of non-adsorptive solutes and transport of adsorptive solutes. Comparative-study...
Modeling the Movement of Volatile Organic Chemicals with Unsaturated Flow
Over the past decade, the rate of groundwater contamination by volatile organic chemicals (VOCs) has increased. Therefore, for both groundwater protection and cleanup, it is necessary...
Mixing and Polymer Performance in Sludge Dewatering
A biofilm reactor, termed the support-aerated biofilm (SAB), was developed in which oxygen was supplied to the interior of the biofilm through a permeable membrane. The reactor was tested...
Health Effects,Risk Assessment and Guidance for Indoor Radon
Unlike many inorganic elements, radionuclides have no nutritional value. Radionuclides are carcinogenic and uranium is also known to be non-carcinogenic as well. This paper is primarily...
Optimizing Drain Spacing and Depth Using Steady State Equations
A method is developed for minimizing the total cost of establishing relief drains by choosing appropriate depth and spacing of the drains. Solution graphs are presented for a wide range...
Agricultural Drainage Water Treatment?Are Toxic Elements Useful?
The problems pertaining to disposing of agricultural drainage water in the San Joaquin Valley are explained. Details are presented on a pilot plant which is pretreating the drainage water...
Sediment Penetration in Lakes as a Result of Dredged Material Disposal and River Sediment Loads
Pollutant transport within the coastal boundary layer is highly sensitive to the vertical current structure and to the magnitude of the vertical current, especially during upwelling and...
Toe Drain System?Barr and Milton Reservoirs, CO
The purpose of this paper is to describe the design and construction of toe drains in difficult soil conditions for two 70 plus year old dams in Colorado using a unique toe drain installation...
Dredged Spoil Storage Basin in the Coastal Waters Near Rotterdam
The maintenance dredging for the Rotterdam harbour area amounts to 23 million m**3 per year, 10 million m**3 of which is polluted to such an extent that a controlled storage is required....
Land Renewal with Topsoil from Clyde Port Dredgings
The paper examines the potential of using sediment dredged from the River Clyde estuary as a topsoil in land renewal. It presents results, to date (1986), of a study sponsored by the Scottish...
Dredged Material Disposal in the Lower Great Lakes
The Buffalo District Corps of Engineers is responsible for dredging the harbors in Lakes Erie and Ontario. Approximately 2,000,000 cubic yards (1,529,000 cubic meters) of material are...
A Computer Model for Oil Slick Transport in Rivers
A computer model for simulating oil slick transport in rivers is presented. In the model the effects of advection, spreading, evaporation, and dissolution on the transformation of an oil...
Evaluation of PCP/Oil Spill on CFT Indian Reservation Near Nespelem, Washington
This paper presents the immediate action taken, the field work performed, and the engineering analysis performed in response to a spillage of a solution of pentachlorophenol (PCP) and...
Flow and Sediment Transport in Curved Channels with Nonuniform Bed Material
Described is a scheme for controlling the exchange of grain sizes between bed and bed load in a curved alluvial channel. The scheme is an integral part of a model for simulating spatial...
A New Technique for Measuring Fine Sediment Accumulation in Gravel Bed Streams
The collection and analysis of bed material samples has been a standard practice for determining the quantity of fine sediments (less than 3. 4 mm diameter) in stream gravels. However,...
Physical Habitat Simulation and the Moveable Bed
One objective of an instream flow analysis is to quantify a flow that will maintain the existing channel and/or flush fine material from the bed. Five empirical approaches to determine...
Development of the Nauvoo Point Plant Beds
In Pool 19, Mississippi River, the accumulation of sediment has resulted in soft-substrate benthic communities or macrophyte beds. Three areas in the downstream 12 miles of the 46. 3 mile...
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