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The main problem in North America is the location of water resources relative to large population centers where the majority of the freshwater drains away from the bulk of the population. Climate variability and change is a reality. It raises the impact on variability and availability within the continent, which is characterized by its different climatic regions. The hydo-vulnerability of North America is tempered and governed by agreements, laws and institutions such as International Joint Commission (IJC) and International Boundary & Water Commission (IBWC), which have been created to resolve transboundary water issues in a cooperative manner for over a century, resulting in minimal conflicts in the region.
In 1978 Canada and the United States concluded an agreement for the protection and enhancement of water quality in the Great Lakes based on the ecosystem approach to management. Since ratification of this agreement, little progress has been made in practical application of this concept to basin-wide management for the Great Lakes. At the same time public concern for the quality of the Great Lakes and their future has risen dramatically. As a result, the need has arisen for a practical, authoritative explanation of the ecosystem concept. This volume, written by highly qualified authorities, addresses these important ecological, political, and economic issues in a systematic and informative manner. In this study, the ecosystem concept and its objectives are defined. The institutional structure that has evolved for governance of the Great Lakes, the need for a more effective governance structure, and prospects for rehabilitation of the Great Lakes Waters are crucial issues considered. The management question is the single most important policy question with respect to the Great Lakes and this is the only study available that brings together all pertinent information and provides steps for new and constructive management of the Great Lakes.
After fifteen years and three editions, Introduction to Environmental Toxicology: Molecular Substructures to Ecological Landscapes has become a standard that defines the field of environmental toxicology, and the fourth edition is no exception. The authors take an integrated approach to environmental toxicology that emphasizes scale and context as important factors in understanding effects and management options. New in the Fourth Edition: New author, Dr. Ruth M. Sofield 8-page color insert New chapter on fate and transport of contaminants Emphasis on the use of all types of models in understanding how nature works Revised sections on synergy and atrazine toxicity Updated coverage of the analysis of impacts to populations, communities and ecosystems Enlarged risk assessment chapter with an in-depth description of a regional scale risk assessment This edition benefits from the insight of a new author, Dr. Ruth M. Sofield, who prepared the new chapter on the fate and transport of contaminants. The relationship between structure and toxicological properties has been a major theme of this book since its inception and this new chapter expands this fundamental concept to include fate and transport. In the early chapters the use of models in science is discussed and this theme carries throughout the rest of the book. So much has changed in the fifteen years since the publication of the first edition. The mid-1990s seem so long ago, when our understanding of environmental toxicology was very basic. Ecological risk assessment was in its very early stages and the consideration of the effects of toxicants on landscapes was only beginning. Computation was still hard, genes stayed put, and it was only becoming recognized that xenobiotics could have hormonal effects — developments that are taken for granted in this edition. Written by authors who teach this subject, a feature that is reflected in their straightforward style, the book provides a foundation for understanding environmental toxicology and its application.

The Great Lakes Program

United States. Congress. House. Committee on Merchant Marine and Fisheries. Subcommittee on Oceanography, Gulf of Mexico, and the Outer Continental Shelf

Published: 1994

Total Pages: 512


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