Search Constraints

Start Over
Filtering by: Subject Water quality -- Oregon -- Congresses Remove constraint Subject: Water quality -- Oregon -- Congresses License All rights reserved Remove constraint License: All rights reserved

Search Results

  • Essays on land use regulation

    Creator:
    Hascic, Ivan
    Abstract:
    This dissertation consists of three papers on land use economics and regulation. The first paper focuses on the environmental impacts of land use and their implications for the design on water quality trading policies. The second and third papers address local land use regulations and their impact on land values...
    Resource Type:
    Dissertation
    Full Text:
    assessment of land use impacts on water quality and aquatic ecosystems in the United States. The results

  • Water chemistry of Oregon Cascade wilderness lakes : a comparison to 1985 data

    Creator:
    Logan, Michael Burke
    Abstract:
    The Western Lake Survey (WLS) of 1985 documented the status of lake water chemistry across the western US and inferred population representations of various subregions and geomorphic units via statistically analyses. Results from this 1985 study indicated that lakes of the Oregon Cascades had the second most pristine and dilute...
    Resource Type:
    Masters Thesis
    Full Text:
    . Title: Water Chemistry of Oregon Cascade Wilderness Lakes: A Comparison to 1985 Data. Abstract

  • An Ecoregion-Based Reference Condition and Classification Scheme for Determining Nutrient Criteria in Oregon Lakes

    Creator:
    Brenner, Jacqueline M.
    Abstract:
    The anthropogenic introduction of nutrients to water bodies has been shown to alter the structure and function of natural aquatic ecosystems, yet national EPA lake and reservoir nutrient criteria remain too broad for effective regional water quality management. This study uses a reference site approach to propose numeric nutrient criteria...
    Resource Type:
    Masters Thesis
    Full Text:
    reservoir nutrient criteria remain too broad for effective regional water quality management. This study

  • Analysis of Oregon's Domestic Well Testing Act data for use in a sentinel surveillance system for private well contaminants

    Creator:
    Hoppe, Brenda O.
    Abstract:
    The Safe Drinking Water Act ensures that public systems provide water that meets health standards. However, no such protection exists for millions of Americans who obtain water from private wells. Concern for safety is warranted as most wells draw from underground aquifers, and studies demonstrate that groundwater is affected by...
    Resource Type:
    Dissertation
    Full Text:
    monitor the quality of private wells to ensure that drinking water is free from contaminants that may

  • 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

  • Investigation of the presence and change over time of water quality parameters in selected natural swimming areas in Oregon

    Creator:
    Van Ess, Erica
    Abstract:
    Few studies, and none in Oregon, have examined the presence and change of water quality parameters over time in popular natural swimming areas. This information is necessary to better understand water quality and risk of illness from either fecal contamination or cross-infection from other swimmers. The purpose of this study...
    Resource Type:
    Masters Thesis
    Full Text:
    in Oregon, have examined the presence and change of water quality parameters over time in popular

  • Preliminary investigation of microbial indicators in the assessment of Oregon streams

    Creator:
    Campbell, Heidi M. K.
    Abstract:
    The Environmental Monitoring and Assessment Program (EMAP) site selection protocol was used to generate a random sample of streams throughout the state of Oregon. One hundred and forty-six selected streams were sampled during the summer, low-flow period of 1997. Traditional microbial public health indicators, including heterotrophic plate counts (HPC), total...
    Resource Type:
    Masters Thesis
    Full Text:
    streams exceeded the current state of Oregon standard for water-contact recreation. Levels of bacteria

  • Evaluating microbial indicators of environmental condition in Oregon rivers

    Creator:
    Pennington, Alan Travis
    Abstract:
    Traditional public health bacterial indicators of water quality and the Biolog® system were evaluated to compare their response to other indicators of stream condition with the state of Oregon and between ecoregions (Coast Range, Willamette Valley, Cascades, and Eastern Oregon). Forty-three randomly selected Oregon rivers were sampled during the summer...
    Resource Type:
    Masters Thesis
    Full Text:
    . Hardin~ Traditional public health bacterial indicators of water quality and the Biolog® system were

  • Evaluation of bacterial community indicators of stream sanitary and ecological condition

    Creator:
    Bracken, Caragwen L.
    Abstract:
    The focus of this research was to develop bacterial community indicators of stream sanitary and ecological condition. The first study compared substrate utilization patterns between centrifuged and uncentrifuged split samples. We found a shift in the relative proportion of each group of bacteria following centrifugation, with a marked increased in...
    Resource Type:
    Dissertation
    Full Text:
    ............................................................................ 1 Bacterial indicators for public health water quality ................................ 2 Whole

  • Evaluating Oregon's beach sites and assessing twenty-six coastal beach areas for recreational water quality standards

    Creator:
    Benedict, Rae T.
    Abstract:
    With congressional passage of the BEACH Act in October of 2000, Coastal and Great Lakes states were mandated to assess coastal recreation waters for the application of ambient water quality standards. This research encompasses two components involved in applying the BEACH Act statues to Oregon. The first component was to...
    Resource Type:
    Masters Thesis
    Full Text:
    Water Quality Criteria for Bacterial Densities 61 3.2 Bacterial Densities in Oregon Beach Waters