| Area | Geyserville |
| Topic | Fish: Mainstem Fish Community Alexander Valley Russian River 2002 |
This map image shows the upper Russian River mainstem reaches surveyed by the Sonoma County Water Agency from July-September 2002 with the number of steelhead observations per mile (upper half of Figure 1 from SCWA, 2003). Alexander Valley and the Healdsburg reaches are depicted in Picture #2. See InfoLinks to learn more about study methods and results.
This map image shows the lower half of Figure 1 from SCWA (2003) with the Russian River mainstem reaches from Hopland to below Healdsburg with the number of steelhead observations per mile. The Russian River in the Alexander Valley and Healdsburg reaches had very few steelhead observations. See InfoLinks to learn more about study methods and results.
Caption and photo from Figure 27 in the Upper Russian River Steelhead Distribution Study (SCWA, 2003): "Alexander Valley Reach, Segment A1. This segment is dominated by flatwater habitat. Typical land use in this reach includes aggregate mining along gravel bars. No steelhead observed."
Caption and photo from Figure 29 in the Upper Russian River Steelhead Distribution Study (SCWA, 2003): "Alexander Valley Reach, Segment A3. This segment contained 1% riffle, 2% deep pool, and 97% flatwater habitats. Flatwater habitat with adjacent broad gravel bars and sparse riparian cover dominated the segment. No steelhead were observed."
Caption and photo from Figure 31 in the Upper Russian River Steelhead Distribution Study (SCWA, 2003): "Alexander Valley Reach, Segment A5. This segment contained 99% flatwater, a broad streambed with shallow depths, and sparse riparian cover. No steelhead were observed."
Caption and photo from Figure 33 in the Upper Russian River Steelhead Distribution Study (SCWA, 2003): "Alexander Valley Reach, Segment A7. This segment contained 40% flatwater and 60% riffle with a gravel substrate. One steelhead was observed in the riffle shown."
Caption and photo from Figure 35 in the Upper Russian River Steelhead Distribution Study (SCWA, 2003): "Alexander Valley Reach, Segment A9. This segment contained flatwater, had a broad streambed with shallow depths, and sparse riparian cover. No steelhead were observed."
Caption and photo from Figure 37 in the Upper Russian River Steelhead Distribution Study (SCWA, 2003): "Alexander Valley Reach, Segment A11. This segment was dominated by flatwater (92%) with occasional shallow riffles (5%) and deep pools (3%). No steelhead were observed."
Click on image to enlarge (43K).
Click on image to enlarge (44K).
Click on image to enlarge (199K).
Click on image to enlarge (207K).
Click on image to enlarge (156K).
Click on image to enlarge (191K).
Click on image to enlarge (126K).
Click on image to enlarge (167K).
To learn more about this topic click Info Links
To view additional information (data source, aquisition date etc.) about this page, click Metadata
| www.krisweb.com |