Denis White is a retired geographer formerly with the U.S. Environmental Protection Agency in Corvallis, Oregon, and Harvard University. He specializes in the use of geographical information systems to analyze human impacts on the environment, and has contributed to numerous community- and regional-scale alternative-futures assessments during the past 30 years, including the Willamette Futures project.

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The Willamette River is the 13th largest river in the United States, and its 29,727 square kilometer basin supports a mosaic of agricultural, timber, and recreational resources as well as several growing urban centers and their water supplies. The Willamette River Basin (WRB) has a Mediterranean climate with dry summers and wet winters. The …

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