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DRAINAGE PROBLEMS OF THE MIDDLE WILLAMETTE VALLEY
Abstract
The Willamette Valley lies in western Oregon between the Coast. Range and the Cascade Mountains. It is aligned roughly north-south with the axis of the valley approximately straddling the 123rd meridian and extending from a few miles south of Eugene to the junction of the Willa- mette River with the Columbia River at Portland. The Willamette Valley is divided into three sections by ranges of low hills which constrict the valley just south of Oregon City and by the Eola Hills and Salem Hills which again constrict it near Salem.This study is concerned with the central part of the valley containing the four counties; Benton, Linn, Marion and Polk (Plates I and II). Marion and Linn counties extend eastward from the Willamette River to the crest of the Cascade Mountains, whereas Benton and Polk counties extend westward from the Willamette River to the crest of the Coast Range. These counties contain much land outside the valley which is not, except for a few isolated farms, agricultural land. The non-agricultural land has been excluded by restricting the study to a belt of land eight townships wide across the valley. The eight township wide belt contains almost all of the land of gentle slope, almost all of the agricultural land, and all of the area of alluvial valley fill in the four counties.
Subject Area
Physical geography|Geography
Recommended Citation
MONTGOMERY, RICHARD CALVIN, "DRAINAGE PROBLEMS OF THE MIDDLE WILLAMETTE VALLEY" (1962). ETD collection for University of Nebraska-Lincoln. AAI6300021.
https://digitalcommons.unl.edu/dissertations/AAI6300021