Download or read book Representation of Regional Urban Development Conditions Using a Watershed-Based Gradient Study Design written by U.S. Department of the Interior and published by CreateSpace. This book was released on 2014-07-23 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the U.S. Geological Survey National Water-Quality Assessment Program, the effects of urbanization on stream ecosystems have been intensively investigated in nine metropolitan areas in the United States.