Water and Sediment Quality Modeling and Criteria Materials
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This is a collection of technical reports related to water and sediment quality modeling and criteria development. They are part of the gray literature that support and document many of the developments in water quality modeling and water quality and sediment quality criteria development. A number of reports are more tangentially related, but have proved to be useful in areas of research that are related.
Browsing Water and Sediment Quality Modeling and Criteria Materials by Title
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- Item1988 Sediment Monitoring Program In The Southern Chesapeake Bay(1989-06) Burdige, David J.
- ItemAbstract Book SETAC 19th Annual Meeting(Society of Environment Toxicology and Chemistry (SETAC), 1998-11) SETAC, Staff
- ItemAcid-Base Metabolism And The Protein Condition(Rand Corporation, 1967-12) Russell, C.D.
- ItemAn Age Dependent Model Of PCB In A Lake Michigan Food Chain(1981-09-30) Thomann, Robert V.; Connolly, John P.An age-dependent food chain model that considers species bioenergetics and toxicant exposure through water and food is developed. It is successfully applied to PCB contamination of the Lake Michigan lake trout food chain represented by phytoplankton, Mysis, alewife, and lake trout. The model indicates that for the top predator lake trout, PCB exposure through the food chain can account for greater than 99 percent of the observed body burden. A simple steady-state computation indicates that ratios of chemical concentration in predators to that in prey in feeding experiments may be as low as 0.2 and still result in significant food chain transfer. It is estimated that a criterion specifying that PCB concentrations of all ages of lake trout be at or below 5 ug/g (wet weight) in the edible portion would require that dissolved PCB concentrations be reduced to somewhere between 0.5 and 2.5 ug/R. The range reflects uncertainty in the PCB assimilation efficiency of the species and the dissolved PCB concentration. This report was submitted in fulfillment of Cooperative Agreement No. CR805916010 by Manhattan College under the sponsorship of the U.S. Environmental Protection Agency. This report covers the project period May 1, 1978 to September 30, 1981.
- ItemAnalysis By Migration In The Presence Of Chemical Reaction(Rand Corporation, 1962-06) Shapiro, Norman
- ItemApplication Of The Telegraph Equation To Oceanic Diffusion: Another Mathematic model(1971-03) Okubo, AkiraThe solution of the conventional diffusion equation has an obvious shortcoming; that is, the substance concentration will rise instantaneously everywhere when substance is introduced at some point in the sea. Although such instantaneous propagation of substance makes a negligibly small contribution to the concentration at large distances from the source, it might cause serious error in predicting water pollution, micro-organism distributions, etc. A diffusion equation which overcomes this difficulty is the telegraph equation characterized by a finite propagation velocity. An ad hoc derivation of the telegraph equation from a set of hydromechanical equations identifies the parameters involved in the equation. Thus, the propagation velocity is related to the correlation tensor of turbulent velocity. As a result, the one-particle dispersion law by Taylor and the relative diffusion law by Richardson can be deduced from the telegraph equation.
- ItemThe Biogenic Structure of Lower Chesapeake Bay Sediments(U.S. Enviromental Protection Agency, 1982-08) Nilson, Karl J.; Diaz, Robert J.; Schaffner, Linda C.; Boesch, Donald F.; Bertelsen, Rodney; Kravitz, MichaelThis study was designed to obtain Information on the animal-sediment relationships in the Chesapeake Bay as a means of assessing the relative importance of benthic macroinvertebrates in determining the distribution and fate of sediment-borne toxic substances. Large volume box cores for biological examination were collected simultaneously with cores taken by Maryland Geological Survey for interstitial water chemistry. Vertical distribution of organisms within the cores was utilized as a means of determining the depth of biological mixing. The vertical distribution of organisms has been found to be correlated to the depth of mixing. Employed was an x-ray technique to determine the relative amounts of mixing in different areas of the estuary as well as the types of biogenic structure produced by resident organisms.
- ItemBiological Field And Laboratory Methods For Measuring The Quality Of Surface Waters And Effluents(1973-07) Weber, Cornelius
- ItemBiological Implication of Metals in the Environment(Technical Information Center Energy Research and Development Administration, 1977) Drucker, Harvey
- ItemThe Carbon-Oxygen Distribution In New York Bight(1979-08) O'Connor, Donald J.; Mancini, John L.
- ItemChemical and Photochemical Transformation of Selected Pesticides in Aquatic Systems(U.S Enviromental Protection Agency, 1976-09) Wolfe, N. Lee; Zepp, Richard G.; Baughman, George L.; Fincher, Robert C.; Gordon, John A.
- ItemChemist-The Rand Chemical Equilbrium Program(Rand Corporation, 1967-12) DeLand, E.C.
- ItemChemistry Laboratory Manual for Bottom Sediments and Elutriate Testing(Department of Commerce, 1979-03) EPA StaffThis document contains the procedures which are used at the EPA, Region V, Central Regional Laboratory for the analysis of bulk sediments, elutriates and other solid samples
- ItemChemisty Of Organomercurials In Aquatic Systems(1973-09) Baughman, George L.; Gordon, John A.; Wolfe, N. Lee; Zepp, Richard G.Kinetics in water of some chemical and photochemical reactions postulated as key transformations in the environmental mercury cycle were investigated. Decomposition of dimethylmercury (DMM) and diphenylmercury (DPM) by acids and mercuric salts was shown to be pH dependent and too slow to be significant under most environmental conditions. Degradation of organomercuric salts by acid is even slower. Theoretical evidence indicates that loss of elemental mercury or DMM at the air-water interface can be important in turbulent systems. Dimethylmercury, methylmercuric chloride, methylmercuric hydroxide, and methylmercuric ion were not decomposed by sunlight, but phenylmercury and sulfur-bonded methylmercuric species were readily decomposed to inorganic mercury. Detailed equilibrium calculations indicate that the sulfur-bonded methylmercuric species are the predominant species in natural waters. Quantum yields for these reactions are presented along with a technique for calculating sunlight photolysis rates from laboratory data. The report also includes a review of the chemical literature concerning the kinetics of chemical and photochemical decomposition of organomercurials.
- ItemChesapeake Bay Sediment Flux Model(1993-06) DiToro, Dominic M.; Fitzpatrick, James J.
- ItemThe Classical Structure Of Blood Biochemistry- A Mathematical Model(Rand Corporation, 1966-07) DeLand, E.C.
- ItemCombined Sewer Runoff And Overflow Characteristics From Treatment Plant Data(1981-04) Mueller, James A.; Di Toro, Dominic M.This research was undertaken to evaluate the adequacy of using a mass balance technique with daily treatment plant data to,determine combined sewer runoff and overflow characteristics. An hourly simulator was utilized to generate known runoff and overflow concentrations as well as plant concentrations, similar to raw treatment plant data. The daily balance technique was used to analyze the simulated treatment plant data which provided comparisons of the calculated to the known runoff and overflow concentrations. The bias and variability associated with the mass balance technique together with a theoretical analysis of the plant measurement error effects is presented. The unit loads and average concentrations from the NYC 26th Ward Treatment Plant area as well as the effect of rainfall characteristics on combined sewer runoff concentrations are also presented. This report was submitted in fulfillment of Grant No, R 806519-01 by Manhattan College under the sponsorship of the U. S. Environmental Protection Agency and covers the project period June 1, 1979 to February 28, 1981. This draft report has been submitted to EPA for publication.
- ItemConditions For A Homogeneous Mixture To Be Ideal(Rand Corporation, 1963-06) Shapiro, N. Z.
- ItemThe Cycline of Toxic Organics in the Great Lakes: A 3-Year Status Report(US Department of Commerce, 1983-05) Eadie, Brian J.; Robbins, John A.; Landrum, Peter F.; Rice, Clifford P.; Simmons, Milagros S.; McCormick, Michael J.; Eisenreich, Steven J.; Bell, Gerald L.; Pickett, Robert L.; Johansen, Kjell; Rossmann, Ronald; Hawley, Nathan; Voice, Thomas
- ItemData Employed In The Development Of A Three-Dimensional, Time-Varying, Numerical Hydrodynamic Model Of Chesapeake(1991-01) Blumberg, Alan F.; Johnson, Billy H.; Heath, Ronald H.; Hsieh, Bernard B.; Pankow, Virginia R.; Kim, Keu W.; Butler, H. LeeA successful calibration/verification of a numerical hydrodynamic model applied to an estuarine/coastal area requires sets of self-consistent data. These data sets must contain freshwater inflows on tributaries; tides at ocean entrances as well as at various interior stations; meteorological data at one or more stations, from which the surface wind stress and heat flux can be determined; and currents, temperature, and salinity at several locations throughout the modeled area In addition, the bathymetry must also be represented on the numerical grid. This report presents data sets employed in the development of a three-dimensional hydrodynamic model of Chesapeake Bay. Since the Bay is so large, there is a lack of synoptic data throughout the Bay and its tributaries. Three relatively extensive synoptic field data sets were identified for use in this study. These data sets were collected during June-July 1980, April 1983, and September 1983. In addition, for the preliminary calibration of the hydrodynamic model, data from the physical model of Chesapeake Bay located on Kent Island, Maryland, were identified. Data from each set are presented in a combination of graphical and tabular forms.