Plastic Standpipe for Sampling Stream-bed Environment of Salmon Spawn
Author: Harold A. Gangmark
Publisher:
Published: 1958
Total Pages: 34
ISBN-13:
DOWNLOAD EBOOKRead and Download eBook Full
Author: Harold A. Gangmark
Publisher:
Published: 1958
Total Pages: 34
ISBN-13:
DOWNLOAD EBOOKAuthor: Harold A. Gangmark
Publisher:
Published: 2018-02-10
Total Pages: 32
ISBN-13: 9780656254354
DOWNLOAD EBOOKAuthor: Great Britain, Environment Agency Staff
Publisher:
Published: 2009-11
Total Pages: 33
ISBN-13: 9781849111317
DOWNLOAD EBOOKThis handbook brings together the latest research on a range of topics related to the groundwater-surface water interface and hyporheic zones specifically for environmental management practitioners.
Author: Earl Shaver
Publisher:
Published: 2007
Total Pages: 327
ISBN-13:
DOWNLOAD EBOOKAuthor: Ergün Demir
Publisher: Tudás Alapítvány
Published: 2020-01-16
Total Pages: 326
ISBN-13:
DOWNLOAD EBOOKAquaculture is one of the fastest way to produce animal protein for growing population in the World. Aquaculture is the art, science, and business of producing aquatic plants and animals useful to humans. Fish farming is an ancient practice and date back as far as 2500 BC. In Europe, fish raised in ponds became a common source of food during the Middle Ages. Today, aquaculture plays a major role in global fish supply. Today, the global community faces financial and economic crisis, climatic changes and the pressing food and nutrition needs of a growing population with finite natural resources. As the world’s population continues to increase over the coming decades, and global living standards rise, demand for fish is set to keep on growing. With most wild capture fisheries already fully exploited, much of that new demand will have to be met from aquaculture. According to FAO estimates, more than 50 % of all fish for human consumption now comes from aquaculture. Aquaculture is one of the most resource-efficient ways to produce protein. Fish come out well because, in general, they convert more of the feed they eat into body mass than livestock animals. Salmon is the most feed-intensive farmed fish to convert feed to body weigt gain and protein followed by chicken. Aquaculture is the controlled cultivation and harvest of aquatic organisms. Most commonly grown are finfish and shellfish, but other aquatic organisms are also cultivated such as seaweed, microalgae, frogs, turtles, alligators, and endangered species. There are many similarities between aquaculture and agriculture, but there are some important differences as well. Aquaculture, like agriculture, is necessary to meet the food demands of a growing global population with diminishing natural fisheries stocks. Aquaculture and agriculture are both farming. However, aquaculture is farming in the water and therefore requires a different set of knowledge, skill, and technology.
Author:
Publisher:
Published: 1995
Total Pages: 12
ISBN-13:
DOWNLOAD EBOOKAuthor: National Research Council (U.S.). Transportation Research Board
Publisher:
Published: 1978
Total Pages: 254
ISBN-13:
DOWNLOAD EBOOKThis volume brings together, from a wide range of experience, such information as may be useful in recognizing, avoiding, controlling, designing for, and correcting movement. Current geologic concepts and engineering principles and techniques are introduced, and both the analysis and control of soil and rock-slopes are addressed. New methods of stability analysis and the use of computer techniques in implementing these methods are included. Rock slope engineering and the selecting of shear-strength parameters for slope-stability analyses are covered in separate chapters.
Author: P. Novak
Publisher: CRC Press
Published: 2017-12-21
Total Pages: 838
ISBN-13: 1351991302
DOWNLOAD EBOOKNow includes Worked Examples for lectutrers in a companion pdf! The fourth edition of this volume presents design principles and practical guidance for key hydraulic structures. Fully revised and updated, this new edition contains enhanced texts and sections on: environmental issues and the World Commission on Dams partially saturated soils, small amenity dams, tailing dams, upstream dam face protection and the rehabilitation of embankment dams RCC dams and the upgrading of masonry and concrete dams flow over stepped spillways and scour in plunge pools cavitation, aeration and vibration of gates risk analysis and contingency planning in dam safety small hydroelectric power development and tidal and wave power wave statistics, pipeline stability, wave–structure interaction and coastal modelling computational models in hydraulic engineering. The book's key topics are explored in two parts - dam engineering and other hydraulic structures – and the text concludes with a chapter on models in hydraulic engineering. Worked numerical examples supplement the main text and extensive lists of references conclude each chapter. Hydraulic Structures provides advanced students with a solid foundation in the subject and is a useful reference source for researchers, designers and other professionals.
Author: Merriam-Webster, Inc
Publisher: Merriam-Webster
Published: 2002
Total Pages: 356
ISBN-13: 9780877796329
DOWNLOAD EBOOKNew edition! Convenient listing of words arranged alphabetically by rhyming sounds. More than 55,000 entries. Includes one-, two-, and three-syllable rhymes. Fully cross-referenced for ease of use. Based on best-selling Merriam-Webster's Collegiate® Dictionary, Eleventh Edition.
Author: Robert Naiman
Publisher: Springer Science & Business Media
Published: 2001-02-16
Total Pages: 734
ISBN-13: 9780387952468
DOWNLOAD EBOOKAs the vast expanses of natural forests and the great populations of salmonids are harvested to support a rapidly expanding human population, the need to understand streams as ecological systems and to manage them effectively becomes increasingly urgent. The unfortunate legacy of such natural resource exploitation is well documented. For several decades the Pacific coastal ecoregion of North America has served as a natural laboratory for scientific and managerial advancements in stream ecology, and much has been learned about how to better integrate ecological processes and characteristics with a human-dominated environment. These in sightful but hard-learned ecological and social lessons are the subject of this book. Integrating land and rivers as interactive components of ecosystems and watersheds has provided the ecological sciences with impor tant theoretical foundations. Even though scientific disciplines have begun to integrate land-based processes with streams and rivers, the institutions and processes charged with managing these systems have not done so successfully. As a result, many of the watersheds of the Pacific coastal ecoregion no longer support natural settings for environmental processes or the valuable natural resources those processes create. An important role for scientists, educators, and decision makers is to make the integration between ecology and con sumptive uses more widely understood, as well as useful for effective management.