NOTICE: The project that is the subject of this report was approved by the Governing Board of the National Research Council, whose members are drawn from the councils of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine. The members of the committee responsible for the report were chosen for their special competences and with regard for appropriate balance.

This report has been reviewed by a group other than the authors according to procedures approved by a Report Review Committee consisting of members of the National Academy of Sciences, the National Academy of Engineering, and the Institute of Medicine.

Support for this project was provided by Living Lakes, Inc.; Chevron USA, Inc.; U.S. Department of Agriculture, Soil Conservation Service under Agreement No. 69-3A75-9-152/R; U.S. Environmental Protection Agency under Agreement No. X-816435-01-0/R; U.S. Department of the Interior, Bureau of Reclamation under Agreement No. 9-FG-81-16650/R; and the National Research Council. Although the results described in this document have been funded in part by the U.S. Environmental Protection Agency under Assistance Agreement X-816435-01-0 to the National Academy of Sciences, it has not been subjected to the Agency's peer and administrative review, and therefore may not necessarily reflect the views of the Agency, and no official endorsement should be inferred.

Library of Congress Cataloging-in-Publication Data

National Research Council (U.S.). Committee on Restoration of Aquatic Ecosystems—Science, Technology, and Public Policy.

Restoration of aquatic ecosystems : science, technology, and public policy / Committee on Restoration of Aquatic Ecosystems-Science, Technology, and Public Policy, Water Science and Technology Board, Commission on Geosciences, Environment, and Resources.

p. cm.

"November 1991."

Includes bibliographical references and index.

ISBN (invalid) 0-309-04534-7

1. Aquatic ecology. 2. Aquatic ecology—Government policy—United States. I. National Research Council (U.S.). Water Science and Technology Board. II. National Research Council (U.S.). Commission on Geosciences, Environment, and Resources. III. Tittle.

QH541.5.W3N38 1992 91-43324

333.91'153—dc20 CIP

Copyright © 1992 by the National Academy of Sciences

No part of this book may be reproduced by any mechanical, photographic, or electronic process, or in the form of a phonographic recording, nor may it be stored in a retrieval system, transmitted, or otherwise copied for public or private use, without written permission from the publisher, except for the purposes of official use by the U.S. government.

Photograph by Ansel Adams. Courtesy of the Trustees of The Ansel Adams Publishing Rights Trust. All Rights Reserved.

Printed in the United States of America

First Printing, March 1992

Second Printing, March 1993

Third Printing, May 1994

Fourth Printing, March 1996

Fifth Printing, May 1997

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