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Corvallis Research Lab
Basinwide Aquatic Habitat Surveys

The ODFW Aquatic Inventories Project is designed to collect information about aquatic habitat throughout Oregon.  This goal has resulted in a methodology that is flexible enough to capture the variability that is found throughout the state.

A basinwide survey is conducted by a pair of surveyors that start at the river mouth and walk to its headwaters documenting aquatic habitat. There are two scales of data collected at the time of the survey. Broad scale information that describes distinct stream reaches characterized by land use, topology, or vegetation are identified.  Within these reaches, habitat units such as pools, riffles and glides are documented.  Information that is collected includes substrate, gradient, channel exposure, woody debris, bank stability and riparian vegetation content.  For specific information about the survey methodology you may download the survey methods.

We have inventoried over 10,000 km of stream habitat. A list of surveyed streams through 2002 is available as a searchable database and a PDF document. Streams surveys are available as GIS coverages. These coverages are based on 1:100k stream hydrography. The Metadata and the Dynamic Segmentation Protocol used for linking the habitat data to the stream layer are available in .PDF format.

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