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.
Results
Showing 1 to 9 of 9 for “"epikarst"”.
-
Multiple Storm Event Impacts on Epikarst Storage and Transport of Organic Soil Amendments in South-Central Kentucky
… to track the transport and residence time of the epikarst water and organic soil amendments during variable flow conditions. Two dataloggers at the same waterfall were set up to collect 10-minute data, which included pH, specific conductivity, temperature, and discharge. Total rainfall amount and …
-
Investigation of the Flow and Fate of Nitrate in Epikarst at the Savoy Experimental Watershed, Northwest Arkansas
… is the upper, weathered portion of karst, the epikarst. However, the understanding of this role is lacking, and the objective of this dissertation was to elucidate it. The fate of nitrate in the epikarst was traced along a hydrologic gradient using a multi-faceted geochemical approach based …
-
Analysis of Hydrologic and Geochemical Time Series Data at James Cave, Virginia: Implications for Epikarst Influence on Recharge
… transit in the transmission zone (KWI 2006). The epikarst, also known as the subcutaneous zone, is an interface between the soil overburden and the transmission zone. The epikarst is considered a critical zone as it can control hydrologic and geochemical characteristics of recharge to the …
-
Epikarst control on flow and storage at James Cave, VA: an analog for water resource characterization in Shenandoah Valley karst
… inlets can rapidly transmit water to depth. The epikarst, which is the region of vegetation, soil, and weathered bedrock above karst aquifers, is a critical zone as it regulates the quantity and quality of recharge to the aquifer. As the epikarst exhibits complex heterogeneity, characterization …
-
A central Texas drying event identified at the Younger Dryas-early Holocene transition using coupled speleothem 𝛿¹³C-¹⁴C analysis
… resource in central Texas) to assess how epikarst moisture conditions varied in the region during the YD-Holocene transition. The relatively high concentrations of ²³²Th (>1 ppb) in several horizons in this sample resulted in McN-1 U-series ages with high uncertainties (>10% of measured …
-
Analyzing a 10-Year Cave Drip Record in James Cave, Virginia: Implications for Storage and Recharge in Shallow Appalachian Karst Systems
… differences in hydrologic characteristics of the epikarst (the zone of soil and weathered bedrock above a karst aquifer); 2) quantify the storage volume of the epikarst and 3) investigate seasonal, and annual trends in recharge. Results of recession analysis show heterogeneity in epikarst …
-
Using Conservative and Biological Tracers to Better Understand the Transport of Agricultural Contaminants from Soil Water through the Epikarstic Zone
… of these pollutants through the soil and epikarst is a difficult process to monitor due to the complex, heterogeneous behavior of the groundwater as it makes its way down to the aquifer below. An experimental site at Crumps Cave lended a unique opportunity to monitor the vadose zone at a …
-
Late Holocene Paleoenvironmental Reconstruction in Barbados
… represents anthropogenic changes to the island’s epikarst aquifer caused by European settlement and sugar cane cultivation on Barbados. Electron imaging revealed chemically distinct layers of detritus within the stalagmite sample, facilitating precise sampling for U-series dating while also …
-
Speleogenetic Evolution and Geological Remote Sensing of the Gypsum Plain, Eddy County, New Mexico
… previously reported for the region, including epikarst, epigene caves, hypogene caves, intrastratal brecciation, calcitization and sulfur oxidation.</p> <p>Late Miocene uplift and tilting of the Delaware Basin tectonic block initiated development of dissolution and collapse of Castile strata, …