WorldCat Identities

Gunnison, Douglas

Overview
Works: 64 works in 148 publications in 1 language and 1,018 library holdings
Genres: Conference papers and proceedings 
Roles: Author, Originator, htt, Editor
Publication Timeline
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Most widely held works by Douglas Gunnison
Microbial processes in reservoirs by Douglas Gunnison( Book )

10 editions published in 1985 in English and Undetermined and held by 219 WorldCat member libraries worldwide

The idea of producing a book on the activities of sence of bottom versus surface withdrawal all have microorganisms in reservoirs had its origins in an a bearing on microbial processes. In addition, res­ article published by the editor in ASM News (De­ ervoirs are often constructed in areas where there cember 1981, 47:527-531). Many individuals ex­ are few, if any, natural lakes . In this regard, reser­ pressed an interest in having the article expanded voirs are also often distinct from natural lakes, and into a book on this subject. Several people were that meteorologic, hydrologic, geo­ to the extent contacted and asked if they would be willing to logic, and edaphic factors make a difference, reser­ contribute chapters to the book. The interest dis­ voir microbiology will also be different. Finally, the played by many persons outside the area of reser­ creation of a new reservoir offers the sediment voir microbiology was encouraging, as was the in­ microbiologist a unique opportunity to view the spiration of the contributors themselves. We were transformation of terrestrial environments into subsequently approached by Dr. L. Harold Steven­ aquatic ecosystems
Reservoirs and waterways : identification and assessment of environmental quality problems and research program development by John W Keeley( Book )

3 editions published in 1978 in English and held by 102 WorldCat member libraries worldwide

The Civil Works program of the Corps of Engineers (CE) involves the entire spectrum of water resources development for the Nation and, as such, is unique among Federal agencies. Current concern for energy demands and water supply have emphasized the need for comprehensive water resources development including hydropower, water supply, and navigation as project purposes. Recreational demands are at a record high for most CE facilities and recreation is generally included as a purpose for new projects. Fish and wildlife enhancement plus water quality management are project purposes that have a direct relationship to the improvement of the Nation's environmental quality, and flood control remains as a traditional project purpose. Consistent with all of these project purposes, the CE is required to address or meet local, regional, and national environmental quality objectives. This requirement has resulted in numerous problems for CE projects in the planning, design, and operational stages. This report contains the results of an effort to identify and assess environmental quality problems associated with Civil Works activities of the CE, and a recommended research program to address these problems
Development of a simplified column test for evaluation of thickness of capping material required to isolate contaminated dredged material by Douglas Gunnison( Book )

3 editions published in 1987 in English and held by 92 WorldCat member libraries worldwide

Long-term effectiveness of capping in isolating Dutch Kills sediment from biota and overlying water by James M Brannon( Book )

3 editions published in 1986 in English and held by 85 WorldCat member libraries worldwide

Effectiveness of capping in isolating Dutch Kills sediment from biota and the overlying water by James M Brannon( Book )

1 edition published in 1986 in English and held by 85 WorldCat member libraries worldwide

Mineral cycling in salt marsh-estuarine ecosystems : ecosystem structure, function, and general compartmental model cycles : final report by Douglas Gunnison( Book )

7 editions published in 1978 in English and held by 35 WorldCat member libraries worldwide

A nutrient and heavy metal cycling study of marsh-esturarine ecosystems was undertaken for the Dredged Material Research Program. The study objective was to gather as much of the existing information as possible on mineral cycling in marsh-estuarine ecosystems. A compartmental model outlining pathways of mineral cycling within the marsh-estuarine ecosystem was developed. Approaches used in the study included literature surveys and discussions with authorities in marsh-estuarine ecology. Information from allied fields of research was used to supplement direct sources of information
Effectiveness of capping in isolating contaminated dredged material from biota and the overlying water by James M Brannon( Book )

4 editions published in 1985 in English and held by 33 WorldCat member libraries worldwide

The effectiveness of capping in chemically and biologically isolating contaminated dredged material was investigated using large- (250 pound) and small- (22.6 pound) scale laboratory reactor units. The ability of various cap materials to isolate contaminated dredged material was assessed in the large reactor units by following the movement of chemical contaminants and microbial spores contained in the capped dredged material into the overlying water column and by monitoring the biological uptake of chemical contaminants by clams and polychaetes. The depth of cap material needed to chemically isolate contaminated dredged material was assessed in the small-scale reactor units. Changes in overlying water concentrations of dissolved oxygen (DO), ammonium nitrogen manganese, and orthophosphate were monitored following isolation of the water column from air by placing a 4-cm layer of mineral oil on the surface. The constituents analyzed were selected due to their mobility under anaerobic conditions, ease of measurement, and generally high concentrations in contaminated dredged material compared to clean cap materials
Comprehensive analysis of migration pathways (CAMP) : contaminant migration pathways at confined dredged material disposal facilities by James M Brannon( Book )

3 editions published in 1990 in English and held by 31 WorldCat member libraries worldwide

A confined disposal facility (CDF) is a diked enclosure having either permeable or low-permeable walls that are used to retain dredged material solids. There are two types of CDFs are located within the influence of normal tidal or other water fluctuations. This report identifies and documents key contaminant mobility processes and pathways operative in CDFs under varying operational and environmental conditions. It also summarizes what is known about contaminant migration, cycling, and mobilization pathways, provides information on models and assessment techniques, and identifies areas for which insufficient information is available. The present information does not permit evaluations of the relative significance of contaminant migration pathways from a CDF. Pathways involving movement of large masses of water, such as CDF effluent, leaching through permeable dikes, or leaching through the dredged material, have the greatest potential for moving significant quantities of contaminants out of the CDF. Pathways such as volatilization may also result in movement of substantial amounts of volatile organic contaminants from CDFs. The relative importance of contaminant cycling and mobilization pathways to net mass balance has not been determined, but available information on each of the contaminant migration, cycling, and mobilization pathways is summarized in the report. Where possible, methods have been provided for making rough estimates of contaminant mass movement via pathways. (TTL)
Sediment-water interactions and contaminants in Corps of Engineers reservoir projects by Douglas Gunnison( Book )

5 editions published in 1989 in English and held by 23 WorldCat member libraries worldwide

Contaminants in Corps of Engineers (CE) reservoir and waterway projects have caused problems in the past. The potential for these contaminants to cause additional problems has increased as more sophisticated water quality sampling programs and anslyses have been adopted by field offices. Contaminant-sediment-water interactions are major mechanisms determining contaminant levels in project waters and availability of contaminants for biological uptake. This report examines the literature on sediment-water interactions and contaminant processes with respect to the unique conditions present in reservoirs. The report also examines the results of CE District surveys conducted to determine the nature and magnitude of contaminant problems in reservoir projects. Recommendations for future investigations are made based on the frequency of contaminant occurrence in CE projects and the major mechanisms for contaminant interactions with sediment and water
Characterization of aerobic chemical processes in reservoirs : problem description and model formulation by Rex L Chen( Book )

7 editions published between 1981 and 1983 in English and held by 22 WorldCat member libraries worldwide

Destratification of hypolimnetic waters produces circulation that moves dissolved oxygen into the anoxic hypolimnion of reservoirs. Destratification increases the dissolved oxygen content of anoxic water and results in decreased concentrations of the dissolved forms of iron, manganese, ammonium, phosphorus, and hydrogen sulfide. Aeration also affects water pH and temperature and redox potential, which change the transformation rate of various chemicals in reservior ecosystems. A thorough review of existing literature indicates that the factors affecting oxidation of nutrients and metals are highly site specific. This report discusses oxidation pathways of chemicals and important environmental parameters that affect the transformation rate of selected nutrients and metals in lakes and reserviors and presents a model for predicting the transition from anaerobic to aerobic conditions
Sediment oxygen demand and its effects on dissolved oxygen concentrations and nutrient release : initial laboratory studies by Cynthia B Price( Book )

4 editions published in 1994 in English and held by 22 WorldCat member libraries worldwide

Three different approaches for examining sediment oxygen demand (SOD) are discussed. These include the use of freshwater sediment amended with organic matter as a source of energy to drive SOD processes, the use of successive aerobic/anaerobic cycles to determine the flux of organic and reduced inorganic chemical species released from the sediment to the water column as a result of SOD, and the evaluation of interactions occurring between the sediment and water column in relation to SOD-driven processes occurring within the sediment. Results are summarized and discussed in terms of measurement and analytical techniques used to describe SOD interaction in fresh and saltwater sediments. Dissolved oxygen, Sediment-water interactions, Nutrient flux, SOD, Sediment oxygen demand, Water quality
Evaluation of factors influencing gas evolution beneath benthic barriers by Douglas Gunnison( Book )

3 editions published in 1991 in English and held by 21 WorldCat member libraries worldwide

Reservoir site preparation : summary report by Douglas Gunnison( Book )

3 editions published in 1986 in English and held by 20 WorldCat member libraries worldwide

Proceedings, US Army Corps of Engineers Workshop on Sediment Oxygen Demand : Providence, Rhode Island, 21-22 August 1990 by US Army Corps of Engineers Workshop on Sediment Oxygen Demand( Book )

2 editions published in 1992 in English and held by 20 WorldCat member libraries worldwide

Characterization of anaerobic chemical processes in reservoirs : problem description and conceptual model formulation by Douglas Gunnison( Book )

2 editions published in 1981 in English and held by 18 WorldCat member libraries worldwide

Richard B. Russell Dam and Reservoir : potential water quality effects of initial filling and decomposition of vegetation( Book )

4 editions published between 1984 and 1985 in English and held by 17 WorldCat member libraries worldwide

Findings of a study to quantify and then evaluate the contribution of initial soil flooding and decomposition of vegetation to the water quality of the newly filled Richard B. Russell Lake are reported herein. Samples of soils and vegetation were taken from three areas representing the most predominant types of soil vegetation within the boundaries of the lake. Using controlled conditions in the laboratory, it was found that both soils and vegetation can release significant quantities of oxygen-consuming materials and plant nutrients. Soil samples had an oxygen demand large enough to cause strong depletion of dissolved oxygen fro mthe overlying water at 5 and 12.5 C, while samples held at 20 C removed all dissolved oxygen within 30 to 40 days. Developmentof anoxic conditions resulted in the release of large quantities of dissolved organic matter, plant nutrients, iron, manganese, and hydrogen sulfide. Upon comparison of these observations with other preimpoundment and postimpoundment investigations, several measures of potenial use were found to reduce the impact of initial soil flooding and decomposition of vegetation on the initial water quality of Richard B. Russell Lake. These included: burning of herbaceous vegetation in the hypolimnion and removal of tops trimmed from trees from areas to be flooded by rpoject waters; application of the data in this report to reservoir operation through use of a mathematical water quality model; reduction of residence time for hypolimnetic waters in the reservoir through operation in the sluice gates; and use of the planned dissolved oxygen injection system during initial reservoir filling
Microbial requirements for in situ biotreatment of explosives by Douglas Gunnison( Book )

4 editions published in 1996 in English and held by 16 WorldCat member libraries worldwide

The biological destruction of explosives in soil depends upon several factors in addition to the presence of suitable microorganisms or microbial consortia. Successful bioremediation requires sufficient moisture, nutrients, and co-substrates (additives) at optimal concentrations. Enhancement of bioavailability by stimulating increased desorption of the contaminant from soils may also be required. Objectives of this study were to develop simple tests to determine the chemical compounds required to stimulate TNT destruction by native microorganisms and the specific combination of additives required to support the most efficient destruction of TNT under static conditions simulating surface application of additives in the field. A three-tiered test system was developed to meet these objectives. Tier I consisted of a previously developed screening test; this was used to determine the presence of TNT-degrading microorganisms and cosubstrates required to support microbial degradation. Tier II consisted of a shake flask test that was developed to determine the combinations of nutrients, cosubstrates, and/or surfactants required to enhance TNT removal with minimal production of undesirable products. Results of shake flask tests indicated that low levels of nutrients generally enhanced the number of microorganisms while supporting and stimulating the treatment process. High levels of nutrients sometimes (Continued) stimulated, but at other times inhibited, growth and treatment. Addition of the surfactant Tween SO sometimes stimulated treatment. Addition of the cosubstrates toluene or acetate sometimes inhibited growth slightly when used with nutrients, but inhibition was commonly offset when Tween SO was used in combination with the cosubstrates
The rhizosphere microbiology of rooted aquatic plants by Douglas Gunnison( Book )

3 editions published in 1988 in English and held by 16 WorldCat member libraries worldwide

Assessment of mechanisms impacting N-nitrosodimethylamine fate within the North Boundary Containment System, Rocky Mountain Arsenal( Book )

2 editions published in 1997 in English and held by 15 WorldCat member libraries worldwide

Rocky Mountain Arsenal (RMA) was for many years a site of military chemical weapons manufacturing activities, including manufacture and assembly of weapons containing intermediate and toxic chemical end-products, incendiary munitions, blending of hydrazine compounds for rocket fuels, and, under civilian jurisdiction, the manufacture of pesticide and herbicide chemicals. As a result of these activities, many contaminants have migrated into the soil and moved into portions of the shallow alluvial aquifer. Chemical analyses by both RMA and Shell Chemical have detected N-nitrosodimethylamine (NDMA), also known as dimethylnitrosamine, within the groundwater around the North Boundary Containment System (NBCS), RMA, and in the NBCS influent and effluent. This compound is of concern because of its mutagenic, carcinogenic, teratogenic, and hepatotoxic properties. While NDMA has been found in water samples collected from observation wells located on RMA, this compound has not been detected in any of the off-post wells. Previously collected data suggested that the granular activated carbon in the groundwater treatment system is not very effective in the removal of NDMA from the system influent. To examine the possibility that NDMA might migrate off-post from RMA and contaminate nearby drinking water supplies and to evaluate the potential that natural sorptive and microbial degradative processes might successfully remove NDMA as a threat, a study was undertaken to examine the sorption capacity of saturated alluvial aquifer soils at the NBCS for NDMA and assess the potential for microbially mediated losses of NDMA to destroy this compound throughout the NBCS. Results indicated that sorptive processes were likely to remove little, if any, NDMA from the groundwater. By contrast. microbial degradative processes were observed to actively destroy NDMA
Mechanisms that regulate the intensity of oxidation-reduction in anaerobic sediments and natural water systems : final report by James M Brannon( )

4 editions published in 1978 in English and held by 14 WorldCat member libraries worldwide

A literature review and a series of laboratory experiments were conducted to investigate the mechanisms that regulate the intensity of oxidation-reduction in natural environments. Results of the literature review indicated that following depletion of oxygen and nitrate, the highly reduced conditions reached by systems containing substantial amounts of organic matter appear to involve mixed potentials generated by unknown organic oxidation-reduction couples that act in concert with inorganic oxidation-reduction couples. Results of the laboratory studies confirmed that organic oxidation-reduction couples of an unknown nature were exerting a strong influence on Eh. The iron and manganese oxidation-reduction systems were also shown to be affecting Eh, although in a manner consistent with the existence of a mixed potential. Redox potential should only be used as a semiquantitative indicator of the intensity of reduction. Precise evaluation of the reduction status of anaerobic natural environments should be determined by rigorous analysis of various chemical constituents, including manganese (II), iron (II), and sulfide. Comparison of results of the present study with those of others indicated that microbial succession and appearance of reduced products closely parallel those found in flooded soils and sediments. The appearance of reduced products corresponded to the sequence roughly predicted by thermodynamics. (Author)
 
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Microbial processes in reservoirs
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English (76)