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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"stream health"”.
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Spatial Analysis of La Nana Bayou Watershed to Assess Stream Health
… the landscape that directly impact a watershed’s health can be monitored routinely with ease. Over a 20-year span within the study area, the following land cover types were used as water quality indicator, including riparian zone, impervious cover, and forest cover. The indicators associated with …
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Long Term Hydrologic Effects on Stream Health from Residential Development Patterns
… the variability of flowrate in Back Creek. Stream health impacts from flow variability were also analyzed with the Post Processor. First, hydrologic statistical variables with ecological relationships were used to gage the level of stream health impacts from flow variability. The averaged …
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Up an Urban Creek: The Role of Development Patterns in Stream Health
… sub-urban areas imposes increasing pressure on stream ecosystems. The "Urban Stream Syndrome" explains the observed negative trends in stream conditions associated with increasingly urbanized watersheds. Urban planners are challenged with addressing increased growth and development while also …
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Evaluation of Urban Riparian Buffers on Stream Health in the Tookany Watershed, PA
Stream channels and their corresponding riparian zones are composed of complex spatially and temporally dynamic systems. Changing land-use associated with urbanization has resulted in large shifts in riparian assemblages, stream hydraulics, and sediment dynamics leading to the degradation of the …
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Using an interdisciplinary approach to improve efficacy of agricultural conservation practices for protecting stream health
… water quality, biota, and ecosystem services of streams (cumulatively referred to as stream health) while increasing food production is a major global challenge. One way to balance these often-competing interests is through the installation of agricultural conservation practices, such as …
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Quantification of the Effectiveness of Agricultural Riparian Buffers to Protect Stream Health in Maryland's Coastal Plain and Piedmont Regions
… of agricultural riparian buffers to protect stream health in Maryland's Coastal Plain and Piedmont physiographic regions. Easily-obtainable data were used to develop scientific guidance for buffer management strategies. Three data sets were used: the 1998 University of Maryland Agricultural …
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Biotic Integrity and Northern Pike Ecology in Eastern South Dakota
Ecosystem goods and services in streams are impaired when their biotic communities are degraded by anthropogenic stressors. An index of biotic integrity (IBI) translates community structure into a standardized stream health score. Documenting stream health is important in the Northern Glaciated …
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The Effect of Sample Size on Rapid Bioassessment Scores and Management Efficiency
<p>The rapid bioassessment method for stream bio monitoring generally uses a fixed count of 200 macro invertebrates as the standard subsample size. This number has been argued to be too small to provide accurate estimates on the richness of macro invertebrate communities and is believed to give …
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Surface Water Impacts from Active Underground Mining
… to assess optimal barrier pillar size for stream protection. Typical analytical and empirical methods used in mine planning were compared against SDPS methods to ensure the validity and advantage to the use of SDPS for this purpose. Finally, underground mining effects on stream chemistry …
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Streams in a changing landscape : identifying candidate reference reaches to assess the physical and biotic integrity of Missouri's wadeable streams
… landscape alterations, with many present-day stream fish and aquatic invertebrate communities representing only a fraction of their historic constituents. Consequently, resource managers need the ability to predict areas of high and low biological integrity to inform management decisions and …
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Skid Trail Stream Crossing Closure Techniques for Protecting Water Quality
The impact of forest roads and skid trails on stream health is being increasingly scrutinized. Forest roads and skid trails have repeatedly been identified as forest operations having the greatest potential to produce sediment by way of non-point source pollution. The stream crossing portion of a …
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A Comparison of the Index of Biotic Integrity by Habitat Type in Swan Creek, Southwest Missouri
… on fish communities was used to score Missouri streams as an assessment of stream health. During summer 2002 we sampled Swan Creek, a 5th order stream in Southwest Missouri, which flows into the White River system. We sampled 19 sites, collecting 59 species and 17,622 individuals. Each sampling …
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Ecosystem metabolism in coastal plain streams of southeast Louisiana : environmental and watershed effects
… in determining the current ecosystem theory of streams, both spatially among multiple systems and longitudinally within the same system, as well as identifying potentially impaired systems, especially when contrasted with streams considered unimpaired. Several factors have been identified as …
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Hydrogeomorphic characterization and classification of Pacific Northwest mountain streams for biomonitoring
… become the prevailing technique for assessing stream health in the United States. Because pre-disturbance biological conditions are rarely known, a reference site approach is often used to determine the extent of stream degradation. Ecoregions are the predominant spatial units within which …
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Urban Riparian Areas: Ecological And Streamside-Ordinance Assessments
Streamside protection ordinances have been established in many urbanizing areas; however, there has been a paucity of assessments of the effectiveness of such ordinances. A quantitative assessment of the ecological impairments in an urban river system can provide a key component in a basin-scale …
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Characterization of hyporheic zone processes of a northern prairie stream
… A hyporheic zone occurs beneath and adjacent to streams where surface water and groundwater mix. This zone is known to be a reservoir for solutes and a habitat for interstitial organisms. Hyporheic zone boundaries in the Tongue River, North Dakota, were investigated through examination of the …
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ECOTOXICOLOGICAL IMPACTS OF RUN-OF-RIVER DAMS ON THE AMERICAN DIPPER (CINCLUS MEXICANUS) AND MOUNTAIN STREAM FOOD WEBS
… common alternate energy source on mountain streams. Despite reductions in size and greenhouse gas emissions compared to conventional impoundments, RoR dams may have ecotoxicological impacts through disruption of the natural flow regime. The American Dipper (Cinclus mexicanus) is a high …
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Examining the Impacts of Valley Fills in Stream Ecosystems on Amphibian and Aquatic Insect Communities in Southeastern Kentucky
… high abundance and complex life cycles, stream salamanders and aquatic insects are important trophic links and serve a critical role in transferring energy. Despite this importance little research has examined their community structure simultaneously in aquatic ecosystems. The primary …
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Design and Implementation of a Real-Time Environmental Monitoring Lab with Applications in Sustanibility Education
… and temperature -- as indicators of stream health - for an on-campus impaired stream in real-time. In addition, weather parameters (temperature, barometric pressure, relative humidity and precipitation) are measured at the LEWAS outdoor site. The measured parameters can be accessed by …