500 Fifth Street, N.W. Washington, DC 20001

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.

Support for this project was provided by National Aeronautics and Space Administration Grant Number NNG05GK08G, National Oceanic and Atmospheric Administration, Contract Number DG133R04CQ0009, National Science Foundation Grant Number EAR-0340018, Nuclear Regulatory Commission Grant Number NRC-04-05-087, U.S. Army Corps of Engineers Contract Number W912EK-05-P-0209, and U.S. Environmental Protection Agency Cooperative Agreement Number X3-83146501. Any opinions, findings, conclusions, or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the organizations or agencies that provided support for the project.

International Standard Book Number 13: 978-0-309-11457-8

International Standard Book Number 10: 0-309-11457-8

Cover: Trout Lake area photo courtesy of Carl Bowser, Silver Pixel Images, Madison, Wisconsin.

Additional copies of this report are available from the

National Academies Press,

500 Fifth Street, N.W., Lockbox 285, Washington, DC 20055; (800) 624-6242 or (202) 334-3313 (in the Washington metropolitan area); Internet,

Copyright 2008 by the National Academy of Sciences. All rights reserved.

Printed in the United States of America.

The National Academies | 500 Fifth St. N.W. | Washington, D.C. 20001
Copyright © National Academy of Sciences. All rights reserved.
Terms of Use and Privacy Statement