Watershed Analysis Reports

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https://hdl.handle.net/1794/6628

Watershed analyses evaluate the effect of forest management practices on a watershed's physical and biological processes.

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Browsing Watershed Analysis Reports by Author "Umatilla National Forest (Agency : U.S.)"

Now showing 1 - 2 of 2
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    Desolation ecosystem analysis and Upland Forest vegetation analysis
    (1999-07-02) Umatilla National Forest (Agency : U.S.)
    Upland analysis identifies ecological processes of greatest concern, establishes how well these processes are functioning, and then determines the conditions or circumstances under which restoration and other management activities could occur in the watershed. Findings of ecosystem analysis for Desolation watershed include: available target maximum standard water temperature for tributaries should be 55-60 degrees F, the watershed has a high concentration of Botrychium; non-native seeded grasses occupy a high proportion of meadow cover; riparian obligate plant species are underrepresented; current noxious weed infestation is low; opportunities for use of natural fuels treatment are limited; old forest structure is much below historic levels; existing C1/C2 old growth network contains no old forest; and reproductive habitat for pileated woodpeckers and American martin has become rare.
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    Umatilla and Meacham ecosystem analysis and Upland forest vegetation analysis: Umatilla and Meacham watersheds
    (2001-04) Umatilla National Forest (Agency : U.S.); Powell, David C.
    Ecosystem analysis finds the watersheds are a critical source of relatively cool water for the entire Umatilla Subbasin, the Umatilla River and Meacham Creek provide some areas of relatively high quality conditions for remnant and recovering fish populations, bull trout populations are at risk because of their small population and limited satisfactory habitat with less than ideal water temperature conditions, coldwater source protection may conflict with high priority vegetation management activities, overstocked stands with dense understories invite wildfires, a high risk of infestation exists from western spruce budworm and Douglas-fir tussock moth, and ten native plant species are at risk. Vegetation analysis describes the potential vegetation, cover types, size classes, structural stages, density (canopy cover), and disturbance processes. Also includes the historical range of variability for forest structural stages, consideration of limited vegetation components, and an assessment of and suggestions for stocking levels for various tree species.