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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 223 for “"karst"”.
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Karst hazard analysis towards the development of predictive karst models for southern Ontario
An investigation into karst hazard in southern Ontario has been undertaken with the intention of leading to the development of predictive karst models for this region. The reason these are not currently feasible is a lack of sufficient karst data, though this is not entirely due to the lack of …
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Imaging and mitigating karst features
… (5) determine the factors contributing to karst processes, and (6) propose karst mitigation. Electrical resistivity tomography (ERT) and multichannel analysis of surface waves (MASW) were employed for the acquisition of subsurface geophysical data. Borehole controls were used to verify and …
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The Karst Landscape of Yucatan
Made available in DSpace on 2014-12-09T18:29:31Z (GMT). No. of bitstreams: 1 6507095.pdf: 7876002 bytes, checksum: 061cae08f3b82015b426f899c670a3d8 (MD5) Previous issue date: 1965
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Belonging in the Karst Mountains: Hmong Ways of Life on The Dong Van Karst Plateau,Vietnam
… study of Hmong people living on the Dong Van Karst Plateau in Ha Giang, Vietnam. Through the concept of belonging, the thesis uncovers the complex nature of the Hmong relationship to the limestone landscape, which is experienced, with ambivalence, as a place of security, awesome power, …
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Belonging in the Karst Mountains: Hmong Ways of Life on The Dong Van Karst Plateau,Vietnam
… study of Hmong people living on the Dong Van Karst Plateau in Ha Giang, Vietnam. Through the concept of belonging, the thesis uncovers the complex nature of the Hmong relationship to the limestone landscape, which is experienced, with ambivalence, as a place of security, awesome power, …
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Modeling karst aquifer response to rainfall
… conductivity and potential gradient in a karst aquifer system. Rainfall excess in the form of potential energy from sinkhole sub-basins is input to element nodes and routed through a one-dimensional finite-element mesh to the karst spring represented by the last node in the finite element …
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Geophysical Imaging of Karst Features in Missouri
… waves (MASW) and boring data were used to map karst related features in Missouri in order to understand karst processes better in Missouri. Previous works on karst in Missouri were mostly surficial mapping of bedrock outcrops and joints, which are not enough to define the internal structure of …
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An Application and Refinement of the Karst Disturbance Index through Evaluating Variability in Island Karst Disturbance in Puerto Rico
<p>Karst environments are unique landscapes that contain important resources, including freshwater aquifers and specialized ecosystems, which are easily disturbed due to the interconnected nature of the surface and subsurface. The anthropogenic impacts on karst are deleterious to the ecosystems …
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Hydrologic and Geochemical Cycling within Karst Versus Non-Karst Basins within the Interior Low Plateau Province of South-Central Kentucky
… nutrient and geochemical cycling between karst versus nonkarst basins within the Interior Low Plateau Province. Field data including stream discharge, evapotranspiration, and dissolved major ion concentrations were collected for a period of one year for two basins within Mammoth Cave …
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Trophic Dynamic Interactions in a Temperate Karst River
<p>Surface streams in karst landscapes are often characterized by high nutrient levels due to incomplete filtration through series of innumerable, below-ground conduits. Seasonal growth of the filamentous alga, Cladophora, is typically associated with nutrient-rich waters. This research compared …
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Karst water studies and environment in West Malaysia
… the environmental characteristics and karst water properties of selected limestone outcrops in Selangor, the Kinta Valley and the North-west region, West Malaysia. The meso-topography, soil and vegetation cover of 13 plots, which encompass the range of weathering environments observed …
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Epiphytic Diatom Community Structure in a Karst Riverine System
… community structure of two host species along a karst gradient in the upper Green River, Kentucky to a gain a better understanding of the role of diatoms in the food web. The host species studied were Podostemum ceratophyllum and Cladophora. Percent cover of P. ceratophyllum and Cladophora were …
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Karst Hydrogeology of the Haney Limestone, South-Central Kentucky
… has one of the world’s most intensively studied karst<br />areas, with most work focusing on the Mammoth Cave System and related caves and aquifers. However, slightly higher in the stratigraphic section than Mammoth Cave, the Haney Limestone is a locally important but less well studied carbonate …
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RESISTIVITY IMAGING OF PROMINENT SEEPAGE PATHWAYS IN KARST TERRAIN
… approach was conducted to evaluate subsurface karstic conditions in Greene County, southwestern Missouri. Electrical resistivity tomography (ERT) was employed to image anomalously low resistivity zones associated with the presence of seepage pathways that were anthropogenic and/or natural in …
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Environmental Influences on Tree-driven Karst Bedrock Physical Weathering
… have not been investigated in temperate karst regions until now. I monitored forces at the root-rock interface for an American elm and Hackberry tree between September 2019 and May 2020. I used piezoelectric force sensors to determine if differences in species, tree size, the distance of …
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Organic Matter Dynamics and Trophic Structure in Karst Groundwater
In this study of energy pathways in karst groundwater the first chapter examines spatial and temporal patterns of bacterial density and activity in the Dorvan-Cleyzieu karst aquifer, France. During baseflow, bacterial density and activity in the water column was similar in upper and lower zones of …
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Sinkholes in the marble and dolostone karst of Sylacauga, Alabama
The hypothesis of this study is that sinkhole occurrence is being anthropogenically accelerated or induced in the study area. The objectives of this research are: - to identify natural conditions in the study area which are associated in the literature with sinkhole development - to identify the …
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Agricultural Contaminant Source and Transport in a Karst Groundwater Basin
… land use in areas that are located in karst groundwater basins negatively impact groundwater quality because karst terrains provide multiple, direct hydrologic connections from the surface into karst aquifers. The connections and rapid velocities associated with surface and subsurface …
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Estimating groundwater recharge in Jinci karst groundwater system, North China
More than 25% of the world’s population relies on karst groundwater as the primary source for drinking and irrigation. However, due to the global climate change as well as population expansion, the contradictory between supply and demand of water resource becomes more and more pronounced. Karst …
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Investigations of rapid groundwater flow and karst in the Chalk
… flow in the Chalk and evaluates the degree of karstification. A survey of surface karst features revealed a clear spatial pattern in their distribution with three distinctive geomorphological zones. Stream sinks and dolines occur frequently in Zone 1 where there is extensive Palaeogene cover. …
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