Global ETD Search
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 26 for “"Specific Conductivity"”.
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Biological and Membrane Treatment Applications for the Reduction of Specific Conductivity and Total Dissolved Solids in Coal Mine Waters
Specific conductivity (SC) and total dissolved solids (TDS) are increasingly being used as a parameter used to judge the aquatic health of streams that are impacted by coal mining operations in the Appalachian region of the United States. Due to this, government environmental regulatory bodies have …
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Evaluating the role of flow and specific conductivity on stream metabolism across a mining-induced salinity gradient in the Appalachian Coalfield
… of headwater streams and mobilization of ions, specifically SO42-, Ca, and Mg into waters, raising specific conductivity (SpC). Organismal responses to salinization have been well documented in freshwater ecosystems, but there are few measurements assessing how salinity effects on organisms …
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Water Quality Mapping on Lake Texoma USA
… maps for chlorophyll-a, turbidity, and specific conductivity in Lake Texoma and investigating the spatial and temporal relationships between these common water quality indicators. A modified YSI multiprobe was used to develop a system capable of surveying the lake within 4 days with …
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Geophysical Detection of On-site Wastewater Plumes in the North Carolina Coastal Plain, USA
… as monthly groundwater depth, temperature, and specific conductivity measurements to better constrain the geophysical interpretations. Additionally, dissolved inorganic nitrogen (DIN) and Cl concentrations were monitored bi-monthly to assess nutrient transport at the sites. The 3D GPR surveys …
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Water Quality Assessment in Cypress Creek Nature Preserve
… monitored for temperature, dissolved oxygen, pH, specific conductivity, depth, phosphorus measured as orthophosphate, nitrite (NO2") and nitrate (NO3", NOx collectively), and ammonia nitrogen (NH3). The temperature, dissolved oxygen, NH3 and NOx concentrations changed with the growing season, but …
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Low density polyethylene sorption of polycyclic aromatic hydrocarbons in aquatic environments and the role of biofilm
… I investigated the potential roles temperature, specific conductivity, total suspended solids, pH, and biofilms play in impacting PAH sorption to the highly sorptive plastic, low density polyethylene (LDPE). Results showed levels of PAHs sorbed to LDPE tended to be higher in stream sites than in …
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Evaluation of the Relationship Between Land Use and Water Quality in Kittitas County, WA
… pH, and dissolved oxygen. Suspended sediment, specific conductivity, and turbidity were also determined, and samples were collected to measure ammonium, nitrate, and phosphate concentrations. An analysis of EPT percentage and HBI scores for aquatic benthic macroinvertebrates were used to infer …
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Extrusion Printing of Carbon Nanotube Inks, from Rheology to Electronics
… inks, carbon nanotubes (CNTs) have high conductivity, low density, processability at ambient temperatures, and intrinsic mechanical flexibility, showing their potential to serve as a material of choice in the manufacturing of electronics. However, printed CNT structures have been limited …
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The effects of coal mining on sedimentation and fish assemblages in the Powell River, Virginia
… draining coal-mined lands had elevated specific conductivity, iron, manganese, sulphate, and turbidity relative to tributaries in unmined watersheds or in the sixth order mainstem (p ≤ 0.05). The fifth order reach, which had a greater proportion of watershed area surface-mined, exhibited …
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Changes in Wetland Conditions and Wetland Plant Communities in the Prairie Pothole Region After 50 Years
… the original wetlands measuring water depths and specific conductivity as well as measuring wetland size from aerial imagery. Additionally, I conducted quadrat-based vegetation surveys within 4 wetland zones (i.e., wet meadow, shallow marsh, deep marsh, and open water) to examine changes in …
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Interactions of Various Bacterial Populations with Chemical and Physical Factors from Seasonal Inputs and Outputs of Retention Ponds
… was found with a p-value ofE.colicounts. Specific conductivity, pH and water/sediment, input/output (pond) interactions also showed statistical significance. Principal Component Analysis (PCA) was performed for water and sediment separately using PC-ORD™ software and graphed.</p>
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Comparative Ecology and Conservation Status of Procambarus (Pennides) gibbus and Procambarus (Pennides) versutus in Marion County, Georgia
… was tested bimonthly to measure temperature, specific conductivity, turbidity, pH, and dissolved oxygen. Results indicate that Procambarus versutus habitat is clearly different from the habitats of the sister species by virtue of its lower pH and turbidity. Procambarus gibbus habitat is …
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The Effects of Land Use on Tumbling Creek Cave in Taney County, Missouri
… linked to the cave system. This cave is of specific interest because of the karst nature of the area and the recent implementation of Better Management Practice (BMP). Water quality parameters were measured bi-weekly during one year and consisted of pH, turbidity, water temperature, specific …
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Multiple Storm Event Impacts on Epikarst Storage and Transport of Organic Soil Amendments in South-Central Kentucky
… up to collect 10-minute data, which included pH, specific conductivity, temperature, and discharge. Total rainfall amount and other surface meteorological data were collected from a rain station located above the cave. Cave water samples were collected for the analysis of anions, cations, …
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The Effects of Phosphorus Enrichment on the Dominant Phytoplankton Communities of Chaney Lake
… dissolved oxygen, dissolved oxygen %, specific conductivity, pH, and turbidity were measured. Chlorophyll a and phytoplankton community structure were also assessed for all three of the experiments. The various parameters were analyzed with Discriminate Function Analysis, ANOVAs, and …
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Identification of catchment runoff processes as a basis for defining water quality protection zones
… high temporal resolution measurements of specific conductivity, stream water temperature and diurnal variations of stream ions show results consistent with the rainfall-flow modelling in identifying a higher proportion of water on slower pathways in a small catchment on sandstone. Spatial …
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Surface Water and Groundwater Hydraulics, Exchange, and Transport During Simulated Overbank Floods Along a Third-Order Stream in Southwest Virginia
… of varying antecedent moisture. Water levels and specific conductivity were measured in surface water, shallow soils, and deep soils, along with surface flow into and out of the floodplain. Total flood water storage increased as vegetation density increased and or antecedent moisture decreased. …
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Evaluation of a Permittivity Sensor for Continuous Monitoring of Suspended Sediment Concentration
… for SSC with input variables of temperature, specific conductivity, and gain and/or phase at multiple frequencies. The permittivity sensor is comprised of an electrode, power source, and a control box or frequency generator. Fixed and mixed effect, multiple, linear regression models were …
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Limnological and paleolimnological investigations of environmental change in three distinct ecosystem types, Canadian High Arctic
… Ellesmere Island, recorded significantly higher specific conductivity, nutrients, and dissolved organic carbon than freshwater bodies from the surrounding polar desert. In Chapter 5, I provide an examination of long-term environmental change from Melville Island, a region of the High Arctic for …
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Geophysical characterization of onsite wastewater treatment system effects on groundwater quality, eastern North Carolina
… values ≤ 250 Ω.m and corresponding groundwater specific conductivity values ≥ 200 µS/cm were indicative of wastewater plumes and the influence of wastewater on groundwater quality detected up to approximately 15 m from the drainfield. Ultimately, the results from this study provide further …
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