File Geodatabase Feature Class
Tags
salmon, steelhead, Chinook salmon, coho salmon, salmonids, stream habitat, habitat restoration, basin planning, carcass survey, spawner survey, spawning habitat, redds, fin clips, coded wire tags, California North Coast, South Fork Eel River, South Fork Redwood Creek, Sproul Creek, Squaw Creek, Standley Creek, Streeter Creek, Tenmile Creek, Twin Creek, Waldron Creek, Warden Creek, West Fork Sproul Creek, Wildcat Creek, Coastal watersheds, South Fork Eel River, Eel River Drainage, Annual, biota
Annual monitoring of salmon escapement. Determination of extent and use of spawning habitat.
Described in Flossi and Downey et al. 1998. "California Salmonid Stream Habitat Restoration Manual" (available online at https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=22610 ).
TIME PERIOD COVERED. January, 1983 (one survey, none in 1984) into February, 1986.
GEOGRAPHIC EXTENT OF THE RECORDS. Mostly Streams of the Eel River Watershed (Calwater 2.2) and nearby coastal streams of Humboldt and Mendocino Counties. Three samples are from the Mad River drainage (Humboldt County) and one from the Smith River drainage in Del Norte County.
NUMBER OF RECORDS. The database contains 844 records of salmon carcass surveys from 378 streams.
BASE DATA STRUCTURE. The dataset consists of a shapefile created by routing stream sections surveyed onto 1:24,000 routed hydrography created by California Department of Forestry and Fire Protection for the North Coast Watershed Assessment Program (NCWAP), 2003. To reduce attribute table size, location information including legal description and latitude/longitude coordinates are replaced by LLID (a stream identifier based on a concatenation of latitude and longitude at the stream mouth). Using LLID with the distance upstream from the stream mouth any location along the stream can be found. The shapefile attribute table as received several years after the initial data processing effort (see "Supplemental Information" section) contained four sets of fields describing location. The "Legal" field containing township, range and section of the stream mouth, we did not use. The three sets of location fields we used were in degrees, minutes and seconds. The first of the sets identified the location of the stream mouth and was used to verify the correct assignment of stream identifier (LLID). The second set identified the survey starting point, and the third set identified the survey end point. The start points were not consistently at the upstream or downstream end of a sample section but it is important to resolve this for the routing process. For the South Fork Eel River data, this was determined by inspection of the points, exchanging them as needed. For the rest of the data, routing was accomplished first and the downstream end was determined by distance comparisons in an Excel macro. The "Miles" field provided information on the distance covered to the nearest 1/10 mile, and when added to the distance given by the downstream end of a survey section, it was used to establish the upstream end of the survey. The given upstream point coordinates were only used to resolve cases where no "miles" were given. In preparation for routing, the points were snapped to the nearest stream on routed hydrography with an ArcView 3.x script that was written by Eric Haney of DFG's North Coast Northern California Region and modified by Betty Ling of the Pacific States Marine Fisheries Commission. Besides snapping, the script provided the distance from the mouth of the stream. Some editing prior to snapping had to be accomplished to move certain points so they would be snapped to the correct stream. A final step in creating the routed shapefile was to sort the attribute table in ascending order by year to facilitate symbolizing by year on the map.
WHAT EACH RECORD REPRESENTS. Each record represents a salmon carcass survey (also known as salmon spawner survey) on a single stream. In general, the data represent the total living and dead adult salmon and steelhead by species. Additional information such as numbers of redds, marked fish and coded wire tags recovered was included. Stream reach as identified by in-stream habitat inventories was not recorded in these data. Even though the carcass survey data can be viewed by overlaying it with habitat data, statements relating habitat with carcass surveys should probably be limited to the whole stream or watershed level.
There are no credits for this item.
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
In accordance with the California Salmonid Stream Habitat Restoration Manual, [Version ?]
Extent
| West | -124.450058 | East | -122.966987 |
| North | 41.904188 | South | 39.172118 |
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data.
In accordance with the California Salmonid Stream Habitat Restoration Manual, [Version ?]