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  • Storm runoff response from roadbuilding and logging on small watersheds in the Oregon Coast Range

    Creator:
    Hsieh, Frederic Shu-kong
    Abstract:
    The effects of roadbuilding, logging and burning upon stream runoff responses to individual storms are evaluated for the Alsea experimental watersheds, located in the Oregon Coast Range, The parameters analyzed are peak discharge, induced peak discharge, time-to-peak, and storm-runoff volume. The volume parameter is further sub-divided into total, quick, delayed,...
    Resource Type:
    Masters Thesis
    Full Text:
    runoff of a 295 - square mile drainage of Ochoco National Forest in central Oregon was compared with the

  • Changes in storm hydrographs due to clear-cut logging of coastal watersheds

    Creator:
    Harper, Warren Charles
    Abstract:
    The purpose of this study was to determine the effect of clearcut logging on stormflow by analysis of characteristic parameters of individual storm hydrographs. Parameters considered included height-of-rise, peak discharge, volume and time-to-peak. The hydrologic data were derived from experimental watersheds of the Alsea Study located in the Oregon Coast...
    Resource Type:
    Masters Thesis

  • Analytical determination of copper speciation in Oregon highway runoff

    Creator:
    Sprick, Matthew S.
    Abstract:
    Low concentrations of dissolved copper have been shown to adversely affect the olfactory system of endangered salmonids, impairing their ability to avoid predators and likely increasing predation. It is believed that only the free ionic (Cu2+ free) and weakly complexed forms are bioavailable to organisms; these forms typically account for...
    Resource Type:
    Masters Thesis
    Full Text:
    on December 8, 2009. Title: Analytical Determination of Copper Speciation in Oregon Highway Runoff

  • Sub-regional detention siting : a methodology using GIS

    Creator:
    Murdock, Carol L.
    Abstract:
    The Mt. Scott watershed in northern Clackamas County, Oregon is an urban watershed that lies inside the Portland metropolitan urban growth boundary. Urbanization of the watershed began in the early 1970s and has recently accelerated. A landscape level analysis of the urbanization process was combined with the results of a...
    Resource Type:
    Masters Thesis
    Full Text:
    Clackamas County, Oregon is an urban watershed that lies inside the Portland metropolitan urban growth

  • Statistical analysis and speciation modeling of copper in Oregon highway runoff

    Creator:
    Bloomquist, Don J.
    Abstract:
    Low levels of copper have been shown to impair the olfactory system of threatened and endangered (T&E) salmon, decreasing their predator avoidance behavior and likely increasing mortality. However, only dissolved copper (dissCu) present as the cupric ion (Cu2+) and weakly complexed species are truly bioavailable. Previous studies indicate the vast...
    Resource Type:
    Masters Thesis
    Full Text:
    Oregon Highway Runoff By Don J. Bloomquist A THESIS Submitted to Oregon State University

  • Simulation of storm runoff in the Oregon Coast Range

    Creator:
    Fedora, Mark A.
    Abstract:
    Simulation of storm hydrographs in the Oregon Coast Range was explored using the Soil Conservation Service (SCS) curve number methodology, and by developing and testing an antecedent precipitation index (API) method. Standard SCS procedures over-estimated peak discharge by about a factor of two (i.e., average over-prediction of 118 percent). When...
    Resource Type:
    Masters Thesis

  • Measurement and modeling the physical controls of snowmelt in the Pacific Northwest

    Creator:
    Mazurkiewicz, Adam B.
    Abstract:
    The physical controls of snowmelt in the Pacific Northwest (PNW) are poorly understood. While there have been numerous field and modeling investigations at the plot and watershed scale, few studies have identified how the snow energy balance (EB) components vary in importance both spatially and temporally. The identification of how...
    Resource Type:
    Masters Thesis
    Full Text:
    THESIS submitted to Oregon State University in partial fulfillment of the

  • Sediment Transport Prototypes : Novel Methods to Disconnect Forest Roads from Streams

    Creator:
    Kemp, Erica D.
    Abstract:
    Unpaved roads are a critical form of infrastructure in forested landscapes but also a potential source of fine sediment that can degrade sensitive ecosystems nearby. Improved management of aggregate road surfacing can reduce sediment generation, lengthen its useful life span, reduce maintenance costs, and more importantly, mitigate the impacts of...
    Resource Type:
    Masters Thesis
    Full Text:
    Oregon Coast Range. ISCO pump samplers were 8 programmed to sample ditch runoff when rainfall

  • Precipitation-snowmelt timing and snowmelt augmentation of large peak flow events, western Cascades, Oregon

    Creator:
    Jennings, Keith S.
    Abstract:
    Despite advances in the understanding of rain-on-snow storms and their resulting peak flows, little is understood about the response of snowmelt to precipitation and the relative timing of the two at multiple temporal scales within such events. To address this issue, climate, snowmelt, and streamflow data were analyzed for 26...
    Resource Type:
    Masters Thesis
    Full Text:
    Large Peak Flow Events, Western Cascades, Oregon

  • Water quality of runoff from flood irrigated pasture in the Klamath Basin, Oregon

    Creator:
    Ciotti, Damion C.
    Abstract:
    Runoff from agricultural lands into Upper Klamath Basin rivers and lakes can cause water quality problems affecting fish and wildlife. Excessive eutrophication in Upper Klamath Lake is linked to high nutrient input (particularly phosphorus) stemming from both lake sediments and watershed tributaries. On a unit area load basis the Wood...
    Resource Type:
    Masters Thesis
    Full Text:
    , 2004 93 WATER QUALITY OF RUNOFF FROM FLOOD IRRIGATED PASTURE IN THE KLAMATH BASIN, OREGON