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 177 for “"Open-water"”.
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Dynamics of particle clouds related to open-water sediment disposal
Open-water disposal and capping is a promising solution for disposing of the 14 to 28 million m3 of contaminated sediment dredged annually in the United States (National Research Council, 1997). Such practice raises concerns about the feasibility of accurately placing the material in a targeted …
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Mechanics of exchange flow between open water and an aquatic canopy
… vegetation is a common feature in shallow water systems. It alters the dynamics of the system by producing additional drag and by generating differential heating between regions of vegetation and open water through the shading it provides. The differential heating creates density …
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Dynamics of particle clouds in ambient currents with application to open-water sediment disposal
Open-water sediment disposal is used in many applications around the world, including land reclamation, dredging, and contaminated sediment isolation. Timely examples include the land reclamation campaign currently underway in Singapore and the Boston Harbor Navigation Improvement Project. Both of …
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Towards a mechanistic understanding of contaminant attenuation and greenhouse gas emissions in open-water engineered wetlands
… offer a sustainable supplement to conventional water and wastewater treatment by harnessing biological processes which occur naturally in the environment. In macrophyte-free open-water engineered wetlands, design parameters of a shallow water column and geotextile liner select for a benthic …
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Design and construction of a propeller open water testing apparatus and testing of a stereolithography 3D printed model propeller
… the design and construction of a propeller open water testing apparatus for educational and experimental use at MIT. This test apparatus was built as an inexpensive alternative to conducted in-house model scale marine propeller testing. A complimentary study was conducted to explore the …
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Assessing the Effectiveness of Louisiana's Freshwater Diversion Projects Using Remote Sensing
… is experiencing a dramatic loss of freshwater wetlands as a result of natural and man-made changes in the landscape. Multitempral remotely sensed data were used to examine the impact of the Caernarvon Freshwater Diversion Structure, built in 1991 to divert water to Breton Sound. Satellite …
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Aquatic community response to Zequanox®: a mesocosm experiment
… mussels (Dreissena spp.) are European freshwater molluscs that have invaded most major inland water systems across North America, resulting in billions of dollars in damages and losses to fisheries, recreational water use, infrastructure, and industry each year. Zequanox®, a biopesticide …
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The role of aquatic macrophytes in the availability of food for young fish
… weedbeds (907/1 and 3107ug/l) than in the open water (225/1 and 245ug/l). The weedbeds were dominated by Cyclops vernalis americanus and Ceriodaphnia pulchella and the open water by Bosmina longirostris and C. vernalis americanus. C. pulchella and B. longirostris seemed mutually exclusive . …
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Satellite Microwave Remote Sensing of Boreal-Arctic Land Surface State and Meteorology from AMSR-E
… landscape properties including the presence of open water, vegetation type and seasonal phenology, snow cover and freeze-thaw transitions. Daily maximum/minimum air temperature is retrieved with RMSEs of 2.88 K and 2.31 K, respectively. Soil temperature is retrieved with RMSE of 3.1 K. Vapor …
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Satellite Microwave Remote Sensing of Boreal-Arctic Land Surface State and Meteorology from AMSR-E
… landscape properties including the presence of open water, vegetation type and seasonal phenology, snow cover and freeze-thaw transitions. Daily maximum/minimum air temperature is retrieved with RMSEs of 2.88 K and 2.31 K, respectively. Soil temperature is retrieved with RMSE of 3.1 K. Vapor …
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Response of semi-permanent prairie wetland to climate change: a spatial simulation model
… A hydrologic component of the model estimated water levels based on precipitation, runoff, potential evaporation and transpiration. Amount and distribution of emergent cover and open water were modeled using a geographical information system. Vegetation response to changes in water level was …
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The potential for Gracilaria polyculture at Jacobs Bay Sea Products Pty
… Cultivation can take place either, in open waters, or on land. Open water systems are generally less intensive than land based operations. Open water systems can be either bottom planted or suspended. Suspended cultivation has the advantage of maintaining the plant thalli in optimal …
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Chemical Treatment of Monodominant Cattail Stands In Semipermanent Wetlands: Duck, Invertebrate, and Vegetation Response
… effectiveness of glyphosate herbicide to create openings in dense monodominant stands of cattail in semi-permanent wetlands and the response of breeding and overwater nesting ducks and aquatic invertebrates to the chemical treatments were studied in northeastern South Dakota. Four wetlands were …
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NUMERICAL, ANALYTICAL AND EXPERIMENTAL STUDY OF THE THERMAL BEHAVIOUR OF INNOVATIVE ENERGY GEOSTRUCTURES
… thermal energy exchange with both soil and open water. This study builds upon a full-scale EQW test installed in Delft, the Netherlands, which incorporated three distinct types of steel heat exchangers: (1) shallow loops and (2) add-on panels, both installed at a depth of 3 m, and (3) deep …
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Nearshore zooplankton communities of Lake Michigan and implications for invasibility by Asian carp
… zooplankton at 25 nearshore embayment and open water locations around the lake for two years. With this geographically diverse dataset, we explored variation in zooplankton community structure and attempted to predict bighead and silver carp growth across large spatial scales. Our results …
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Waterfowl Pair and Brood Use of Dug brood Complexes in East-Central South Dakota
… management technique to enhance habitat for waterfowl and other wetland wildlife. One type of excavation in wetland basins is the dug brood complex; an interconnected system of pond units, channels, and islands, primarily created to provide waterfowl brood rearing habitat during drought. In …
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Monitoring Anthropogenic Carbon in Cape Cod Bay
… to understanding the health of coastal waters such as Cape Cod Bay, yet are resource-intensive to measure and have little historical data in Cape Cod Bay. Seawater collected from Cape Cod Bay was analyzed for pHₜ, DIC, and TA and compared to historic data from the region. A …
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Ambient noise measurements in the 200-300 Hz band during the Greenland Sea tomography experiment
… noise is higher than the Wenz ambient noise for open water. The regressions between the noise and wind speed show that the noise is wind dependent, with slightly lower slopes than the Wenz curve. Under the heavy pack ice cover conditions, noise levels are much lower than during the ice-free …
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Aerosols and boundary layer structure over Arctic sea ice based on airborne lidar and dropsonde measurements
… influenced by the distribution of sea ice and open water. Leads in the sea ice produce strong convective fluxes of sensible and latent heat and release aerosol particles into the atmosphere. They increase the occurrence of clouds and modify the structure and characteristics of the atmospheric …
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Fish and Amphibian Occurrence in Waterfowl Production Area Wetlands in Minnesota During 1992
<p>From August through September 1992, Waterfowl Production Areas in Minnesota were sampled for the presence or absence of fish and amphibians using barrel and clover leaf minnow traps. Trap nets were used in select wetlands to sample for larger fish species. Models were developed using stepwise …
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