Abstract:
This data layer represents in-stream salmonid habitat data, summarized at the geomorphic reach level using the Rosgen classification of channel type in the Russian River watershed. This metadata file incorporates much of the information that was available in the metadata of the original source data. This information is indicated in quotation marks.
"The "reachsum" GIS database of in-stream salmonid habitat data, summarized at the geomorphic reach level using the Rosgen classification of channel type. Built from data collected from in-stream salmonid habitat surveys done or supervised by the California Department of Fish & Game from 1994 to 2003.
Administrator(s):
Derek Acomb, Bob Coey, Shane T. Feirer "
Purpose:
This data layer was edited from its original source data set for inclusion in the Russian River Watershed Adaptive Management Plan (RRWAMP) and RRWAMP Baseline Watershed Assessment project. The intended use of this data layer in this project is to examine landscape or human factors to promote ecological health and sustainability within the Russian River watershed.
"This layer is intended for salmonid habitat restoration planning at a scale between the habitat unit level and the entire tributary level, with a focus on the geomorphic reach. These data should be particularly useful for selecting potential restoration sites based on their habitat data. In addition, we are using this approach because the geomorphology of streams has an important effect on availability and type of salmonid habitat, and also influences what types of restoration projects are appropriate. "
Supplemental_Information:
"Source:
DATABASE (reachsum_x.dbf) Please join this table with the shapefile via the REACHID field to get access to all the reach-level habitat variables. It is a "reachsum" database of reach-level attribute data that was originally created in June, 2000 by Bob Coey, then the California Department of Fish & Game (DFG) Russian River Basin Planner, using "reachsum.prg" add-on to the "Habitat" Dbase program (this add-on was written by Ken Bunzel in the mid-1990s). This initial database summarized the in-stream habitat data collected by DFG-supervised field crews from 1994 to mid-1998. The reachsum Dbase program took the 1994 to mid-1998 habitat surveys database files and summarized them at the Rosgen geomorphic reach level, as categorized by the field survey crews and recorded in the database files. The data collected through habitat surveys conducted from mid-1998 to 2003 were processed into a second "reachsum" database using a Microsoft Access 2000 macro written by Zeb Young, a University of California GIS Analyst located at the Hopland Research & Extension Center. The 1994 to mid-1998 habitat surveys were then reprocessed with the Microsoft Access extension. The Access 2000-based reachsum extension calculates additional useful reach-level information, and recalculates previously calculated statistics, now weighting individual attributes by habitat unit length/area when calculating many of the summary statistics (please see the attributes section for additional information).
GIS LAYER (reachsum-dissolve.shp, reachsum_dissolved_rr_alb83.shp, reachsum_dissolved_joined_utm83.shp) - This is the shapefile that shows the location and extent of the habitat reaches. The 1994 to mid-1998 salmonid habitat database files were matched to a routed GIS layer of 1:100,000 streams (created by Mike Byrne at DFG in the mid-1990s, and revised by Colin Brooks and Zeb Young) using the Arc/Info dynamic segmentation process. Mike Byrne did the dynamic segmentation for most of the 1994 to mid-1998 salmonid habitat surveys. Colin Brooks, Jeff Opperman, Emily Heaton, Jake Newell, Eli Asarian, Natalie Wenner, Ann-Marie Osterback, and Zeb Young did the dynamic segmentation for the mid-1998 to 2003 data. The mid-1998 to 1999 surveys were calibrated using field maps to provide greater position accuracy of habitat units and channel type locations. Habitat surveys done during 2000-2003 had approximately every 10th habitat unit location recorded with a Garmin GPS unit, and these data points were used to create a more precise calibration of the habitat surveys to the underlying GIS streams layer. Towards the end of the processing of the 2000 data, a more detailed 1:24,000 streams layer became available from the California Department of Forestry and Fire Protection as part of the North Coast Watershed Assessment Program, and we started using that layer for dynamic segmentation (2001-2003 data). The habitat surveys were done from 1994 to 2003, with most surveys being done by the California Department of Fish & Game and AmeriCorps field crews, and some (mostly in 1997 and 2001) by the Sonoma County Water Agency. The Russian River basin is now mostly complete for habitat typing, with occasional updates possible in 2005 or later.
The dynamically segmented ArcView shapefiles were merged into a single layer. A unique identifier for each reach was derived by combining a stream's Primary Name Code (Pnmcd) with the reach number for each survey, as labeled from the start of the survey (01 for the first reach on a stream, 02 for the second, etc.). Where the Primary Name Code was not available, one was generated using the GNIS_ID field from the USGS Global Names Information System data layer, or one was generated using a combination of the data entry person's initials, that day's date, and the number of new Primary Name Codes created that day. The data was dissolved on this unique reach identifier (REACHID), resulting in a new layer called "reachsum-dissolve.shp". The same REACHID identifier was calculated for the reachsum database. The reachsum GIS layer and reachsum database should be joined in ArcView or ArcGIS using the REACHID field. As of November 11, 2004, there are 611 reaches in the reachsum GIS layer (up from 450 in the 2002 release). People using the reachsum GIS layer and reachsum_x.dbf database should link the two using this REACHID field when using the reachsum data, unless they are using the UTM-NAD83 version, where the shapefile and database file are already merged."