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 Subject "Vegetation management -- Umatilla National Forest (Or. and Wash.)"

Now showing 1 - 5 of 5
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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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    Phillips-Gordon ecosystem analysis and Upland forest vegetation analysis
    (2001-10) Walla Walla Ranger District (Wash.)
    Vegetation analysis considers various treatment recommendations, including salvage of dead trees, planting, thinning, improvement cutting in stands where the early-seral species still exist, forest regeneration on dry-forest sites where early-seral species no longer exist, understory removal/thinning, pruning, and prescribed fire. Ecosystem analysis recommendations list priority subwatersheds, enhancement of minor forest species, prescribed fire, road system upgrades to improve water quality, riparian revegetation, introduction of woody debris and fish passage restoration, noxious weed control, and maintenance or restoration of late/old forest structure.
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    Potamus ecosystem analysis
    (2004-12) Heppner Ranger District (Or.); North Fork John Day Ranger District (Or.)
    Provides analysis of historic and current physical and biological conditions of the watershed. Hydrology concerns include maintaining and improving adequate water supplies, maintaining and restoring water quality, and improving overall conditions of streams, floodplains, and riparian ecosystems. Other topics include aquatics, upland forest vegetation, wildfire risk, botanical resources, noxious weeds, vertebrates, fire and fuels, non-forest vegetation, and rare plants.
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    Tucannon ecosystem analysis
    (2002-08) Pomeroy Ranger District (Or. and Wash.)
    Provides analysis of Umatilla National Forest lands within the watershed, characterizing the historic and current biotic and abiotic conditions. Findings include a declining vegetation diversity, 55% of the upland forest has tree densities exceeding recommended levels, wildfire risks are severe in many sections, the Tucannon River has become wide and shallow without woody material and possessing degraded fish habitat, roads continue to contribute sediment and create some channel instability, twelve invasive weed species are present, the clustered lady slipper is the only Forest Sensitive Plant present, 173 historic properties have been located, one endangered and two threatened species are on the Forest Plan list, the total amount of late-old structure is below desirable levels, and prescribed burning should be performed periodically to maintain forage quality.
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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.