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 competencies and with regard for appropriate balance.
Support for this project was provided by U.S. Army Corps of Engineers under DACW05-98-C-0031.
International Standard Book Number 0-309-06433-3
Copies available from
National Academy Press
2101 Constitution Avenue, N.W. Washington, D.C. 20418 800-624-6242 202-334-3313 (in the Washington metropolitan area) http://www.nap.edu
Cover by Van Nguyen, National Academy Press, using photos from the U.S. Army Corps of Engineers Sacramento District.
Copyright 1999 by the National Academy of Sciences. All rights reserved.
Printed in the United States of America.