Effect of Particle Size on Sludge Dewaterability
Using a modified Buchner funnel apparatus to measure specific resistance and a sequential centrifugation/filtration procedure to fractionate a sludge, it was possible to more precisely...
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...
Generalized Methodology for Simulating Mudflows
In this paper, a one-dimensional dynamic flood-routing model, for non-Newtonian fluid properties, is described and applied to two different mudflow events: Holbrook Canyon, Utah, and Mount...
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...
Gully Incision Prediction on Reclaimed Slopes
An investigation was conducted to estimate the potential of gully intrusion into reclaimed waste impoundments. A series of eight reclaimed impoundments exhibiting gully intrusions were...
Behavior of Sediment-Laden Plumes on Steep Slopes
The near field behavior of dense, sediment-laden flows on steep slopes was investigated as part of a study of mine tailings disposal. A literature review indicated that field and laboratory...
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...
Water Erosion from Irrigation?An Overview
Erosion and sedimentation by water includes the process of detachment, movement, and deposition of soil particles (14). Under irrigated conditions, the erosive process is water flowing...
Effects of Erosion on Soil Productivity
Erosion-caused crop production decreases up to 50% have been measured with decreases of 15 to 30% commonly reported. Furrow erosion on irrigated land redistributes topsoil, decreasing...
Intense Storms and the Runoff Coefficient
During prolonged, intense storms the runoff coefficient increases in value and approaches one irrespective of the vegetation and soil characteristics of the watershed. As the runoff coefficient...
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...
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