Download or read book General Program written by American Association for the Advancement of Science. Pacific Division. Meeting and published by . This book was released on 1920 with total page 1636 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Wide Rivers Crossed written by Ellen Wohl and published by University Press of Colorado. This book was released on 2013-05-15 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt: "In Wide Rivers Crossed, Ellen Wohl tells the stories of two rivers—the South Platte on the western plains and the Illinois on the eastern—to represent the environmental history and historical transformation of major rivers across the American prairie. Wohl begins with the rivers’ natural histories, including their geologic history, physical characteristics, ecological communities, and earliest human impacts, and follows a downstream and historical progression from the use of the rivers’ resources by European immigrants through increasing population density of the twentieth century to the present day. The environmental changes in the South Platte and the Illinois reflect the relentless efforts by humans to control the distribution of water: to enhance surface water in the arid western prairie and to limit the spread of floods and drain the wetlands along the rivers in the water-abundant east. In addition, during the past two centuries crops replaced native vegetation; excess snowmelt and rainfall carried fertilizers and pesticides into streams; and levees, dams, and drainage altered distribution. These changes cascaded through networks, starting in small headwater tributaries, and reduced the ability of rivers to supply the clean water, fertile soil, and natural habitats they had provided for centuries. Understanding how these rivers, and rivers in general, function and how these functions have been altered over time will allow us to find innovative approaches to restoring river ecosystems. Wide Rivers Crossed looks at these historical changes and discusses opportunities for much needed protection and restoration for the future."

Download or read book Available Publications of the Illinois State Natural History Survey written by Illinois. Natural History Survey Division and published by . This book was released on 1924 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book EPA 600 4 written by and published by . This book was released on 1978-11 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of The Academy of Natural Sciences Vol CIV 1952 written by and published by Academy of Natural Sciences. This book was released on with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Report written by and published by . This book was released on 1986 with total page 676 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Field Investigative Data for Water Pollution Surveys written by William Marcus Ingram and published by . This book was released on 1966 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Assessing the Ecological Integrity of Running Waters written by M. Jungwirth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 491 pages. Available in PDF, EPUB and Kindle. Book excerpt: The assessment of the ecological integrity of running waters is a prerequisite to an understanding of the effects of human alterations. The evaluation of degradation processes provides key information on how to avoid further negative impacts. The success of future conservation, mitigation and restoration activities will rely on sound assessment methodologies and their ecological relevance and applicability. Assessment methodologies are therefore an integral part of sustainable river management. This book synthesizes and discusses state-of-the-art experiences in assessment methodologies. Including the latest knowledge on structures, processes and functions of running waters as a fundamental basis for developing adequate assessment methods, the book focuses on method development, application, and in particular on integrated assessment methods. This book is directed at scientists and managers with the aim of more effective preservation, restoration and maintenance of the ecological integrity of running water ecosystems.

Download or read book Environmental Health Series written by and published by . This book was released on 1963 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings of the High School Conference of written by and published by . This book was released on 1928 with total page 1636 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Practice of Water Pollution Biology written by Kenneth Marsh Mackenthun and published by . This book was released on 1969 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Assessment and Criteria written by Wayne S. Davis and published by CRC Press. This book was released on 1995-03-03 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological Assessment and Criteria presents a state-of-the-art overview of the applications of biological assessments and biocriteria for water quality management in fresh waters. The book presents case studies which illustrate how bioassessment has been used to identify and diagnose water quality problems. It also provides examples of the use of qualitative and quantitative biocriteria as regulatory tools to complement water quality criteria and standards. The first book to present the technical foundation, rationale, program and policy relevance, and legal basis for the most accurate tools used to assess freshwater natural resource and regulatory efforts, this book provides useful and timely information for water quality managers.

Download or read book Environmental Requirements and Pollution Tolerance of Trichoptera written by Todd L. Harris and published by . This book was released on 1978 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Industrial Wastes written by Clifford Elyman Murphy and published by . This book was released on 1972 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: Toxicity of industrial effluents discharged directly into or in close proximity to the Trinity River (Tarrant County, Texas) was investigated through a 27-month period. The investigation was concerned with four aspects--bioassay, growth and development, chemistry, and benthos. Three industries contributed toxic materials which had a significant influence on the surrounding aquatic community. Toxicity ranges were established for the respective effluents using mature minnows, fry and spawn. Effluents from a railroad equipment cleaning area, a plant producing cracking catalysts used in processing combustion engine fuels, and a sewage treatment plant influenced the water quality of the river downstream from the outfalls. The ranges of nitrates, phosphates, biochemical oxygen demand and specific conductance for the river were increased by the effluents.

Download or read book Journal of the Tennessee Academy of Science written by Tennessee Academy of Science and published by . This book was released on 1950 with total page 342 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Public Health Service Publication written by and published by . This book was released on 1965 with total page 558 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Proceedings written by and published by . This book was released on 1967 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: