Documentation of the modeling of potential vegetation at three spatial scales using biophysical settings in the Columbia River Basin assessment area
By: compiled and edited by Marion Reid, Patrick Bourgeron, Hope Humphries, and Mark Jensen
Contributors: University of Washington; Interior Columbia Basin Ecosystem Management Project (U.S.); United States. Forest Service; United States. Bureau of Land Management
Publisher: [University of Washington]
Published: 1995
Place of publication: [Seattle, Wash.?]
Language: eng
Subjects: Vegetation surveys; Columbia River Watershed; Vegetation mapping; Mathematical models
Other titles: Columbia Basin analysis and mapping
Description: This report describes the application of a vegetation model to predict potential vegetation over the 822,922 km b2 s of the Columbia River Basin (CRB) assessment area at 3 scales. Topographic relief in the CRB assessment area ranges from 23 m (75 ft) to 4203 m (13,785 ft), with vegetation types that include desert grasslands in low elevation valleys and basins and alpine communities on some of the high peaks. A regional hierarchical classification of the Western U.S. vegetation (Bourgeron and Engelking, 1994) was used to derive potential vegetation (PV) type classes along moisture and temperature gradients at three distinct scales (section, regional and coarse). Elevation, slope and aspects settings were assigned to the PV classes at the section level. These settings were used to assign each 1 km x 1 km DEM pixel to the most probable PV class. GIS technology was used to aggregate these section level mapping units into the regional level map and the coarse level map. All maps were reviewed for their general approximation of PV cover over the CRB assessment area.
Notes: Cover title.

"28 June 1995."

"Prepared for the USFS under contract no. 53-04H1-6890."

"Project coordinator: Mark Jensen."

Contributing authors: Patrick Bourgeron, Steve Cooper, Rex Crawford, Lisa Engelking, Hope Humphries, Mark Jensen, Jimmy Kagan, Jim Menakis, Bob Moseley, and Marion Reid.

"The following report was prepared by University scientists...as part of the ongoing efforts of the Interior Columbia Basin Ecosystem Management Project, co-managed by the U.S. Forest Service and the Bureau of Land Management."--Preface.

Chiefly tables.

Place of publication and publisher supplied by cataloger.

Includes bibliographical references.

Photocopy.