Assessment and Validation of Modelling Under-ice Dissolved Oxygen Using DOSTOC, Athabasca River, 1988 to 1994

Assessment and Validation of Modelling Under-ice Dissolved Oxygen Using DOSTOC, Athabasca River, 1988 to 1994 PDF Author: Patricia A. Chambers
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 220

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Book Description
The aim of this study was to examine the existing model approach and to make recommendations for improved modelling of under-ice dissolved oxygen (DO) concentrations in the Athabasca River. Previous modelling efforts have involved using the DO simulation model DOSTOC, but discrepancies between observed and predicted DO concentrations for 1992 and 1993 highlighted the needs for a review and assessment of the modelling approaches used. This report reviews the structure of the DOSTOC model and input data used for modelling, then describes a stochastic run of the model using the best available values for input data and process rates, including revised rates and ratios for converting five-day biological oxygen demand (BOD) values to ultimate BOD values, measured values for sediment oxygen demand and sedimentation, and a temperature correction for pulp mill BOD decay rates. Simulation results indicate whether the model could predict DO for 1990-94 winters. Regression equations were also developed relating DO concentration to river distance.

Northern River Basins Study

Northern River Basins Study PDF Author: Northern River Basins Study (Canada)
Publisher:
ISBN:
Category : Athabasca River Watershed (Alta.)
Languages : en
Pages : 292

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Book Description
Report to the federal ministers of Environment and Indian & Northern Affairs, Alberta's Minister of Environmental Protection, and NWT's Minister of Renewable Resources. Summarises the main scientific findings of the Northern River Basins Study, which was established to examine the relationship between industrial, municipal, agricultural, and other development and the Peace, Athabasca, and Slave River basins. Reviews the characteristics of the northern river basins and their peoples, the organisation of the Study, and major findings in the areas of environmental overview, use of aquatic resources, traditional knowledge, flow regulation, fish distribution and habitat, nutrients, dissolved oxygen, contaminants, drinking water, ecosystem health, modelling, human health, and cumulative effects. Recommendations by the Study Board, First Nations, and scientific advisors regarding such issues as basin management, monitoring, research, public participation, and a successor organisation are then presented. Also includes a summary of opinions, suggestions, and recommendations expressed at 17 community workshops held throughout the northern river basins area.

Technical Reports of the Northern River Basins Study by Subject and Geographical Area Studied

Technical Reports of the Northern River Basins Study by Subject and Geographical Area Studied PDF Author: Mark S. J. Ouellett
Publisher:
ISBN:
Category : Aquatic ecology
Languages : en
Pages : 74

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Book Description
Lists Northern River Basins Study technical reports by issue number, subject, and geographic area studied. Subject areas used to classify the reports are: hydrology/hydraulics, nutrients/dissolved oxygen, contaminants, food chain, drinking water, other uses, traditional knowledge, and synthesis and modelling. Ten geographic divisions are used: three each for the Athabasca and Peace Rivers, and one each of the Wapiti/Smoky rivers, Peace-Athabasca Delta, Lake Athabasca, and Rivière des Rochers/Slave River.

Dissolved Oxygen Conditions and Fish Requirements in the Athabasca, Peace and Slave Rivers

Dissolved Oxygen Conditions and Fish Requirements in the Athabasca, Peace and Slave Rivers PDF Author: Patricia A. Chambers
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 112

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Book Description
The NTBS was designed to address the ecological concerns about pulp mill expansion, and to increase scientific knowledge about environmental conditions [ecology, ecosystem sustainability, water pollution and control, habitat, effect on fish and fishing, etc.] in the major river systems of the north. The study's objectives were to gather and interpret sound scientific information about the basins, develop appropriate recommendations for basin management, and communicate effectively with the public. The government response report confirms the governments' commitment to ecosystem sustainability and to pollution control in northern rivers. First Nations and Metis aboriginal [native] peoples contributed significantly to the NRBS.

A Review and Evaluation of Water Quality and Quantity Models Used by the Northern River Basins Study

A Review and Evaluation of Water Quality and Quantity Models Used by the Northern River Basins Study PDF Author: Edward McCauley
Publisher: The Study
ISBN:
Category : Nature
Languages : en
Pages : 124

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Book Description
Summarizes the major modelling projects undertaken to model water quality in the Peace, Athabasca, and Slave river systems. The first section describes the scope of the problem of modelling water quality in large complex systems that are relatively oligotrophic, located at relatively high altitudes, and experience highly seasonal environmental fluctuations. It also provides a summary of the models used to predict key water quality variables. Section 2 gives a general overview of the utility and shortcomings of water quality models, with the goal of establishing key criteria for assessing the successes of models developed by the Northern River Basins Study (NRBS). Section 3 summarizes key findings of the NRBS models and evaluates the results against criteria outlined in section 2. Section 4 presents a series of recommendations for modelling dissolved oxygen, transport and fate of contaminants, and distribution of contaminants in the food chain, along with strategic suggestions for future work.

Freshwater Ecosystems and Climate Change in North America

Freshwater Ecosystems and Climate Change in North America PDF Author: Colbert E. Cushing
Publisher: John Wiley & Sons
ISBN:
Category : Science
Languages : en
Pages : 278

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Book Description
Freshwater Ecosystems and Climate Change in North America brings together a group of experts from the fields of geochemistry, climatology, hydrology and aquatic ecology to address the central question, What would be the impact to and response of freshwater ecosystems in your region as a result of a hypothetical doubling of CO2 in the atmosphere? These regional papers and syntheses will provide a solid foundation upon which scientists can proceed and build in their efforts to provide other scientists, regulators, and decision-makers with meaningful information concerning the important phenomena associated with climate change.

Integrated Environmental Modelling Framework for Cumulative Effects Assessment

Integrated Environmental Modelling Framework for Cumulative Effects Assessment PDF Author: Anil Gupta
Publisher:
ISBN: 9781773852003
Category : Cumulative effects assessment (Environmental assessment)
Languages : en
Pages : 216

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Book Description


Ethylene Glycol

Ethylene Glycol PDF Author: Stuart Dobson
Publisher: WHO
ISBN: 9789241530224
Category : Medical
Languages : en
Pages : 24

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Book Description
This publication, part of a series from the International Programme on Chemical Safety, evaluates the risk to human health and the environment posed by exposures to ethylene glycol, a clear, colourless liquid with a sweet taste but no odour. Estimated production capacity was 9.4 million tonnes in 1993, and release into the environment is mainly to the hydrosphere. The largest local release to surface waters would follow its use as a de-icer on airport runways and planes. On a world-wide basis, approximately two-thirds is used as a chemical intermediate, with a further one-quarter used as an antifreeze in engine coolants.

Industrial Release Limits Policy

Industrial Release Limits Policy PDF Author: Alberta. Environmental Sciences Division
Publisher: Environmental Sciences Division, Environmental Services
ISBN: 9780778514114
Category : Effluent quality
Languages : en
Pages : 12

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Book Description


Hydrodynamics and Water Quality

Hydrodynamics and Water Quality PDF Author: Zhen-Gang Ji
Publisher: John Wiley & Sons
ISBN: 1118877152
Category : Technology & Engineering
Languages : en
Pages : 612

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Book Description
The primary reference for the modeling of hydrodynamics and water quality in rivers, lake, estuaries, coastal waters, and wetlands This comprehensive text perfectly illustrates the principles, basic processes, mathematical descriptions, case studies, and practical applications associated with surface waters. It focuses on solving practical problems in rivers, lakes, estuaries, coastal waters, and wetlands. Most of the theories and technical approaches presented within have been implemented in mathematical models and applied to solve practical problems. Throughout the book, case studies are presented to demonstrate how the basic theories and technical approaches are implemented into models, and how these models are applied to solve practical environmental/water resources problems. This new edition of Hydrodynamics and Water Quality: Modeling Rivers, Lakes, and Estuaries has been updated with more than 40% new information. It features several new chapters, including one devoted to shallow water processes in wetlands as well as another focused on extreme value theory and environmental risk analysis. It is also supplemented with a new website that provides files needed for sample applications, such as source codes, executable codes, input files, output files, model manuals, reports, technical notes, and utility programs. This new edition of the book: Includes more than 120 new/updated figures and 450 references Covers state-of-the-art hydrodynamics, sediment transport, toxics fate and transport, and water quality in surface waters Provides essential and updated information on mathematical models Focuses on how to solve practical problems in surface waters—presenting basic theories and technical approaches so that mathematical models can be understood and applied to simulate processes in surface waters Hailed as “a great addition to any university library” by the Journal of the American Water Resources Association (July 2009), Hydrodynamics and Water Quality, Second Edition is an essential reference for practicing engineers, scientists, and water resource managers worldwide.