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U·X·L® Encyclopedia of Water Science explores water science and issues from an international perspective. Topics covered include lakes and streams, oceans, aquatic animals, weather and climate, glaciers, wetlands, ecology, hydropower, commercial fishing, acid rain, recreation, pollution, economics, water conservation, international water law, global warming and much more. Numerous sidebars highlight significant facts and opinions, provide biographies, explain allusions and describe water-related activities. Provided in each entry are definitions for scientific terms and sources for further research. A general glossary, an index, more than 150 black-and-white photographs, and a different set of color photo inserts are included in each volume. (20050801)
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U•X•L ENCYCLOPEDIA OF water science U•X•L ENCYCLOPEDIA OF water science Volume 2 Economics and Uses K. Lee Lerner and Brenda Wilmoth Lerner, Editors Lawrence W. Baker, Project Editor U•X•L Encyclopedia of Water Science K. Lee Lerner and Brenda Wilmoth Lerner, Editors Project Editor Lawrence W. Baker Imaging and Multimedia Lezlie Light, Kelly A. Quin, Dan Newell Editorial Charles B. Montney Manufacturing Rita Wimberley Product Design Jennifer Wahi Permissions Denise Buckley, Shalice ShahCaldwell, Ann Taylor Composition Evi Seoud ©2005 by U•X•L. U•X•L is an imprint of Thomson Gale, a division of Thomson Learning, Inc. or information storage retrieval systems—without the written permission of the publisher. U•X•L® is a registered trademark used herein under license. Thomson Learning™ is a trademark used herein under license. For permission to use material from this product, submit your request via Web at http://www.galeedit.com/permissions, or you may download our Permissions Request form and submit your request by fax or mail to: For more information, contact: Thomson Gale 27500 Drake Rd. Farmington Hills, MI 48331-3535 Or you can visit our Internet site at http://www.gale.com. ALL RIGHTS RESERVED No part of this work covered by the copyright hereon may be reproduced or used in any form or by any means—graphic, electronic, or mechanical, including photocopying, recording, taping, Web distribution, Permissions Department Thomson Gale 27500 Drake Rd. Farmington Hills, MI 48331-3535 Permissions Hotline: 248-699-8006 or 800-877-4253, ext. 8006 Fax: 248-699-8074 or 800-762-4058 Cover photographs reproduced courtesy of Photodisc by Getty Images (volume 1, sailboats), courtesy of Digital Vision Ltd. (volume 2, pump), and by permission of Corbis, photograph by Lester Lefkowitz (volume 3, Hoover Dam). While every effort has been made to ensure the reliability of the information presented in this publication, Thomson Gale does not guarantee the accuracy of data contained herein. Thomson Gale accepts no payment for listing; and inclusion in the publication of any organization, agency, institution, publication, service, or individual does not imply endorsement by the editors or publisher. Errors brought to the attention of the publisher and verified to the satisfaction of the publisher will be corrected in future editions. LIBRARY OF CONGRESS CATALOGING-IN-PUBLICATION DATA UXL encyclopedia of water science / K. Lee Lerner and Brenda Wilmoth Lerner, editors ; Lawrence W. Baker, project editor. p. cm. Includes bibliographical references and index. ISBN 0-7876-7617-9 (set : hardcover : alk. paper) — ISBN 0-7876-7673-X (v. 1 : hardcover : alk. paper) — ISBN 0-7876-7674-8 (v. 2 : hardcover : alk. paper) — ISBN 07876-7675-6 (v. 3 : hardcover : alk. paper) 1. Water—Encyclopedias, Juvenile. 2. Hydrology—Encyclopedias, Juvenile. I. Lerner, K. Lee. II. Lerner, Brenda Wilmoth. III. Baker, Lawrence W. GB662.3.U95 2005 5