| Area | S.F. Trinity |
| Topic | Temperature: Floating Weekly Average Olson Cr (Lower) 1991-1992 |
| Caption: The floating weekly average water temperature of Lower Olson Creek, tributary of Hayfork Creek, is shown above for the years 1991-1992. Water temperatures in Lower Olson Creek were not optimal for salmonids throughout the summer in both years. Fires burned much of the watershed in 1987 and there may be lingering water temperature effects in the years shown above. The maximum weekly average temperature (MWAT) exceeded the threshold for suitability for coho salmon according to Welsh et al. (2001) for extended periods in both years. Similar temperature thresholds have not been confirmed for the Klamath Basin and therefore threshold is shown only for reference. Coots (1952) documented coho salmon in Olson, Butter and Eltapom Creeks. Data provided by Shasta Trinity National Forest but was trimmed for outliers by the Forest Science Project (now known as the Institute for Forest and Watershed Management). See Info Links for more information. | |
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