Area	South Fork
Topic	Habitat Typing: Brandon Gulch Embeddedness

 

Caption:  Gravel embeddedness is a visual measure of gravel quality at potential salmonid spawning sites made during habitat typing surveys. Embeddedness is the degree to which silt and sand buries cobble and gravel in pool tail crests. Optimal spawning habitat according to CDFG (1998) is less than 25% embedded (see InfoLinks). Brandon Gulch showed substantially impaired spawning habitat suitability with 84% of pool tail crests showing embeddedness over optimal for salmonids or otherwise unsuitable. The latest version of the California Salmonid Habitat Restoration Manual (CDFG, 1998) added a fifth class for embeddedness which is simply unsuitable for spawning. This may be because the pool tail crest is bedrock, mud or unsuitable for any reason. Embeddedness is far less useful for determining gravel suitability and trends than quantitative methods such as McNeil samples. The California Conservation Corp surveyed 2547 feet or approximately .5 miles of Brandon Gulch in September 1996. Data supplied for use in KRIS by the California Department of Fish and Game, Sacramento, CA.

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