Water Quality An Introduction
This volume is of great importance to humans and other living organisms. The study of water quality draws information from a variety of disciplines including chemistry, biology, mathematics, physics, engineering, and resource management.University trainin
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Water Quality An Introduction Third Edition
Water Quality
Claude E. Boyd
Water Quality An Introduction Third Edition
Claude E. Boyd School of Fisheries, Aquaculture and Aquatic Sciences Auburn University Auburn, AL, USA
ISBN 978-3-030-23334-1 ISBN 978-3-030-23335-8 https://doi.org/10.1007/978-3-030-23335-8
(eBook)
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Preface
Water is commonplace; two-thirds of the earth is covered by the ocean, and nearly 4% of the global land mass is inundated permanently with water. Water exists in the hydrosphere in a continuous cycle—it is evaporated from the surface of the earth but subsequently condenses in the atmosphere and returns as liquid water. Life in all forms depends on water, and fortunately the earth is not going to run out of water; there is as much as there ever was or is ever going to be. Despite the rosy scenario expressed above, water can be and often is in short supply, a trend that will intensify as global population increases. This results because all places on the earth’s land mass are not equally watered. Some places are well watered, others have little water, and water may be deficient in well-watered locations during droughts. The quality of water also varies from place to place and time to time. Most of the earth’s water is too saline for most human uses, and pollution from anthropogenic sources has degraded the quality of much freshwater and lessened its usefulness. Evaporation is a water purification process, but salts and pollutants left behind when water evaporates remain to contaminate the returning rainwater. As the human population has grown, the necessity for producing goods
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