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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 32 for “"reference conditions"”.
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Reference conditions for streams in the Grand Prairie Natural Division of Illinois
… Department of Natural Resources, 18 potential reference quality stream reaches in the Grand Prairie Natural Division were evaluated in May 2004 and 2005. This agriculturally dominated region, located in east central Illinois, is among the most highly modified in the state. Illinois …
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Spatial and temporal heterogeneity in lotic systems : implications for defining reference conditions for macroinvertebrates
… levels, and temporal variability for defining reference conditions for macroinvertebrates was evaluated.
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Development of Biological Reference Conditions of Wadeable Streams in the Major Ecoregions and Subecoregions of Georgia
… and that best individually discriminate between reference sites and impaired sites. More than 240 wadeable streams in Georgia were sampled during the September thru February index period using RBP protocols during three successive sample seasons (1999-2003). Ecoregional reference (minimally …
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Ecological patterns, community classification, and a comparison of approaches for predicting biological and habitat reference conditions in New Hampshire streams
<p>Reference conditions play a vital role in many challenges facing both conservation and natural resources management. This dissertation sought to establish minimally-impacted reference conditions for stream biota and habitat in New Hampshire and explore alternative statistical methodologies to …
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Biological assessment of tropical riverine systems using aquatic macroinvertebrates in Tanzania, East Africa
… investigated. A set of 20 criteria for screening reference sites was established and used to identify and distinguish between reference and test sites in the study area. A two-level hierarchical framework for classifying homogenous river types was developed and validated. Three river types were …
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Second-Order Relative Motion Equations
… are expanded in Taylor series form using reference conditions consistent with that of a circular orbit. Only terms that are linear or quadratic in state variables are kept in the expansion. A perturbation method is employed to obtain an approximate solution of the resulting nonlinear …
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Effectiveness of Stand-Scale Forest Restoration, Siskiyou Mountains, Oregon
… Oregon. Its dual purpose is to 1) define reference conditions and build a site-specific case for restoration through multi-scale analysis of historical ecology (Chapter III), and 2) demonstrate streamlined monitoring protocols that practitioners can use to adapt restoration practices over …
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Effectiveness of Stand-Scale Forest Restoration, Siskiyou Mountains, Oregon
… Oregon. Its dual purpose is to 1) define reference conditions and build a site-specific case for restoration through multi-scale analysis of historical ecology (Chapter III), and 2) demonstrate streamlined monitoring protocols that practitioners can use to adapt restoration practices over …
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Utilizing archival data to assess historic changes in flood flow conveyance of the Mississippi River
… assessment of change in river systems requires reference conditions. However, most large navigable waterways in the United States and elsewhere around the world have a wealth of archival data because of past engineering projects and flood control efforts. For example, in the United States, large …
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Laminar and turbulent convective heat transfer over bodies at an angle of attack
… the inviscid streamline geometry. The choice of reference conditions and the exponent in the viscosity-temperature relationship highly affected the turbulent heating rates.
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Polyphase Proterozoic tectonometamorphic history of the Taos Range, northern New Mexico
… Supracrustal rocks preserve peak metamorphic conditions of T less than or equal to 650 degrees Celsius, 6-8 kb in the northern Taos Range, and T greater than or equal to 550 degrees Celsius, 6 kb in the southern Taos Range. In the northern Taos Range, relationships between field geometries, …
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Using Benthic Indicator Species and Community Gradients to Optimize Restoration in the Arid, Endorheic Walker River Watershed, Western USA
… lake. Samples were analyzed to quantify baseline conditions in reference and degraded reaches of river and identify opportunities and constraints for aquatic community restoration. Naturally harsh environments in the lower river characterized by high temperatures and low base flow combined with a …
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Testing and characterisation of large high-energy lithium-ion batteries for electric and hybrid electric vehicles
… for a careful investigation of suitable reference conditions in order to achieve reproducibly precise results from repeated discharge/charge cycles. Then the main tests result in detailed graphs and tables of the discharge and charge characteristics. These main tests include effects of …
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Long-Term (24-Year) Effects of Harvest Disturbances on Ecosystem Productivity and Carbon Sequestration in Tupelo-Cypress Swamps in the Mobile-Tensaw River Delta
… represented mature forest or pre-harvest reference conditions (REF). Above- and belowground plant biomass, belowground woody debris, soil C, and soil CO2 efflux were measured. Twenty-four years after treatments were applied, forest C levels were higher in SKID treatments (206.1 Mg C ha-1) …
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Himalayan Blackberry (Rubus armeniacus) Effects on Fish Habitat: Impacts from Riparian Zones Inundated with Himalayan Blackberry
… blackberry (Rubus armeniacus) plants (test conditions) (3 sites) and reaches with a riparian zone consisting primarily of native vegetation (reference conditions) (5 sites). This thesis studied streams in the lower mainland of British Columbia near Coquitlam, Maple Ridge, and Mission to …
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Headwater Catchments: Estimating Surface Drainage Extent Across North Carolina and Correlations Between Landuse, Near Stream, and Water Quality Indicators in the Piedmont Physiographic Region
… represented small, medium, and large size-class reference conditions. Catchment areas and the assessment variables were normally distributed within catchment size-classes, as were the CN and FBI variables for the 33 catchments combined. Relationships between CN and assessment variables, as well …
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Hydrogeomorphic characterization and classification of Pacific Northwest mountain streams for biomonitoring
… 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 stream reference conditions are developed, but they neglect important …
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Chemical vapor deposition of thin films for ULSI interconnect metallization
… observe a growth rate of 17.7 „b 1.5 nm/min at reference conditions of 300„aC substrate temperature, 0.025 Torr Cu(hfac)2 partial pressure, 1.6 Torr isopropanol (reducing agent), and 80 Torr H2 (carrier gas). The film resistivity approaches the bulk value of copper for film thickness greater …
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Assessment Of The Macroinvertebrate Assemblages From The Mesohabitats Of A Headwater Stream-Wetland Hydrologic Restoration In Eastern Kentucky
… Kentucky Division of Water's headwater reference conditions and a pre-restoration condition control site. Specific objectives included: 1) compare macroinvertebrate assemblage structure and function across study sites, 2) determine if mesohabitats (pools and riffles) support unique …
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