|
|
|
What we do
Habitat assessments
 Surveys are conducted to document the amount and quality of stream habitat available to aquatic organisms, specifically native fishes. Surveys are limited to where we can gain access to the stream channel and get permission from private landowners. Since 2001, the RCD has surveyed all salmonid streams in the Napa River watershed. California Department of Fish and Game contributes most of the funding for the project.
Methods
The RCD uses methodology described in the California Salmonid Stream Habitat Restoration Manual (Flosi and Reynolds, 1994). A two person crew walks the channel and samples approximately 10% of the habitat units for:
-
Flow – measured with USGS flow meters or visually estimated
-
Channel Type – measured according to Rosgen system
-
Temperatures – water and air temperature taken every tenth habitat unit
-
Habitat Type – determined according to DFG categories
-
Cobble Embeddedness – visually assessed at potential spawning locations
-
Shelter Rating – assigned to each unit based on amount of structure and cover
-
Substrate Composition – dominant and subdominant particle class visually assessed
-
Canopy – measured with a spherical densitometer and broken into evergreen/deciduous components
-
Bank Composition and Vegetation – material and vegetation class on both banks
-
Large Wood – count of the number of pieces of wood larger than 12” diameter
-
Bankfull Width - measured to nearest foot every tenth habitat unit
Habitat Surveying Projects
-
Southern Napa River Watershed Plan – 2009 (Streams: Browns Valley, Camille, Huichica, Milliken, Murphy, Pickle, Redwood, Salvador, Sarco, Spencer, Suscol, Tulucay)
-
Central Napa River Watershed Project - 2005 (Streams: Bale, Bell, Canon, Conn, Montgomery, Napa River, Rector, Soda, Wing Canyon, York)
-
Northern Napa River Watershed Project – 2002 (Streams: Cyrus, Diamond Mt., Dutch Henry, Garnett, Napa River, Ritchie, Simmons)
-
Napa Creek Salmon Monitoring Project Year 1 report – 2006
-
Wooden Valley Creek Habitat Assessment – 2002
-
Sulphur Creek Habitat Assessment – 2002
-
Carneros Creek Habitat Assessment – 2002
-
Napa River Fisheries Assessment – Oakville Crossroad to Oak Knoll Ave, 2008
-
Napa River Fish Habitat Survey – Rutherford Restoration Reach, 2003
|
|
