Swanson, Frederick J.; Grant, Gordon. 1982. Rates of soil erosion by surface and mass erosion processes in the Willamette National Forest. [Place of publication unknown]: [Publisher unknown]; Report prepared for the Willamette National Forest, Eugene, OR. 50 p. [On file at: Pacific Northwest Research Station, Forestry Sciences Laboratory, 3200 Jefferson Way, Corvallis, OR 97331].
This report was prepared at the request of, and under funding from, theWillamette National Forest to provide a summary of available data on soilerosion by surface and mass erosion processes on Forest lands. Thesedata were to be summarized in terms of Soil Resource Inventory (SRI)units (Legard and Meyer, 1973) and type of management treatment. Thesummarization of mainly unpublished data was to be completed in threeweeks.
In addition to providing the basic data requested, we discuss briefly (a)the field methods and assumptions involved in generating these numbers,(b) limitations and qualifications of these estimated erosion rates, (c)the relationship between measured erosion rates and SRI units, and (d)some thoughts on how to improve the data base and methods of analysis forthe next round of planning. Also included is a table reviewing data onsoil disturbance by various logging systems in western U.S. and Canada.