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 20 for “"Water drainage"”.
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Quantification of multiple waterborne pathogens in drinking water, drainage channels, and surface waters in Kampala, Uganda over seven months of seasonal variation
Longitudinal water quality monitoring is important for understanding seasonal variations in water quality, waterborne disease transmission, and future implications for climate change and public health. In this study, microfluidic quantitative PCR (MFQPCR) was used to assess the presence of human …
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Wetting and frosting/defrosting study on microgrooved surfaces
… especially for their potential to promote water drainage. There is increasing interest in understanding and manipulating the effects of surface wettability on the condensation and frosting processes, to minimize condensate retention and frosting penalties, and to promote effective …
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Metal foams as novel materials for air-cooling heat exchangers
… performance, issues related to condensate drainage and frost formation are considered. The main performance obstacle for the application of metal foams is the relatively high pressure drop occurring for velocities typical to air-cooling applications. This high pressure drop results in …
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Temporal playscape design within an existing landscape dynamic
… site. Considerations of natural soil behavior, water drainage patterns, soil erosion, and plant invasion are instrumented into the final articulation of the playscape.
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Experimental study of the thermal-hydraulic performance of a brazed aluminum heat exchanger under wet-surface conditions
Using an open-loop wind tunnel and a full-cone water spray nuzzle, the air-side performance of a liquid-to-air heat exchanger is studied experimentally for wet-surface conditions. The test specimen is a brazed-aluminum, louvered-fin heat exchanger. The total capacity, pressure drop and water …
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Assessment of Community Management of Water Supply and Sanitation Projects A Case Study of Hananasif Ward, Kinondoni District, Dar Es Salaam Municipality "
The management and dispensation of water supply and sanitation projects like that being administered by the Hananasif Community Development Association (HCDA) has been a chronic problem in most development countries. The HCDA started on a strong note in 1993 under the auspices of sustainable Dar Es …
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Riscos ambientais em comunidades subnormais - a comunidade Santa Clara no bairro do Castelo Branco
… may trigger a disaster, such as release of wastewater on the slopes, houses with structural hazards and anthropogenic changes in natural slopes, such as cutting and inappropriate cultivation of some plant species in unstable slopes. Were also seen major structural works undertaken by the …
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Using Anisotropic Micro-Scale Topography to Manipulate the Wettability of Aluminum and Reduce the Retention of Water
Water droplets placed on a micro-grooved aluminum surface using a micro-syringe exhibit significantly increased apparent contact angles, and for water condensed onto an inclined, micro-grooved surface, the droplet volume at incipient sliding is reduced by more than 50% compared to droplets on a …
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Evaluating the climate-related capacities and vulnerabilities of the Matsaudi Community in Botswana
… education, malaria prevention and creation of water security infrastructure like boreholes, irrigation systems and storm water drainage improvements. Conclusion: The participatory methodology enabled co-creation of contextualised climate adaptation strategies against the effects of climate …
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Evaluación de alternativas de gestión del regadío tradicional para la reducción del impacto agroambiental
… agrosystems and its near environment. For thus, water use and agri-environmental impact on Irrigation District nº V of Bardenas (Zaragoza, Spain; 15,500 ha) was studied by analyzing its drainage network (2000 and 2007) and the monitorization of one of its hydrogeological basins (D-XIX-6; 65 ha) …
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Seepage Rates in Closed Basins
Seepage is an important component of the water budget in closed basins that do not have surface water drainage features. In the shallow water table environment of Florida, internal drainage of soil controls flooding. With the recent rapid population growth and urban development in the state, a …
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RESPONSES OF RECENT BENTHIC FORAMINIFERA TO METAL POLLUTION IN SOUTH WEST ENGLAND ESTUARIES: A STUDY OF IMPACT AND CHANGE
… Cornwall in January 1992 of metalled acidic mine water drainage from the recently closed Wheal Jane tin mine. Shortly after this discharge a post-impact study using the responses of Recent benthic foraminifera as indicators of metal pollution was carried out on this Creek which had not been …
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Characterization of the basal hydraulic system of a surge-type glacier : Trapridge Glacier, 1989-92
… sliding brought about by sustained high basal water pressure. How sustained high pressures develop and how the subglacial distribution of water influences glacier sliding are fundamental unsolved questions. We describe an investigation of the water drainage system beneath Trapridge Glacier, a …
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Assessment of Wetland Mitigation in South Dakota
… Agency through Section 404 of the Clean Water Act, wetland mitigation has become common in the last several decades. The goal of this project was to review wetland mitigation in South Dakota by 1) reviewing federal and state wetland policies and regulations; 2) examining the outcomes of …
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Liquid-infused slippery surfaces for air-conditioning and refrigeration applications
… drawn a lot of attention due to their excellent water repellency. A method is presented for creating a durable liquid-infused surface (LISs) on aluminum surfaces to minimize the water retention and enhance thermal-hydraulic performance for air-conditioning and refrigeration (AC&R) applications. …
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The sedimentology and diagenesis of copper-bearing rocks of the southern margin of the Damaran Orogenic Belt, Namibia and Botswana
… release of various elements into interstitial waters, which later recombined to form authigenic minerals and overgrowths. A paragenetic sequence of authigenic minerals is recognized in the aeolian Red Bed sandstones of the Witvlei fan complex, parts of which can be identified in surrounding …
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Effects of air-side surface wettability on the performance of dehumidifying heat exchangers
… investigated as a method to enhance condensate drainage from the air-side surface of dehumidifying heat exchangers. The attendant impact on the thermal-hydraulic performance of a heat exchanger is also explored, with the goal of improving energy efficiency of heat exchangers through appropriate …
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Influence of Poultry Litter on Dark Tobacco Growth and Soil Nutrient Availability
… concerns such as nitrate contamination of groundwater, P runoff into surface water, and accumulation of heavy metals in the soil are often related to excessive application of poultry litter. Studies were conducted at Western Kentucky University's Agricultural Research and Education Complex in …
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Processes controlling the behavior of LNAPLs at groundwater surface water interfaces
… processes pertaining to LNAPL releases at groundwater surface water interfaces (GSIs). Governing processes were investigated via laboratory studies and a preliminary analysis of forces controlling LNAPL occurrence in unsaturated media. A total of six laboratory sand tank experiments were …
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The ecology and utilization of dryland lucerne pastures on deep sands in the Upper South East of South Australia
… other species in the pasture. The rate of soil water usage, the degree of soil water storage and the amount of soil water drainage in the deep sand profile were also affected by grazing treatments. Lucerne is particularly suited to the deep sand environment largely because of its ability to …