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Full-Text Articles in Physical Sciences and Mathematics
Resolution Of Lava Tubes With Ground Penetrating Radar, Sanaz Esmaeili
Resolution Of Lava Tubes With Ground Penetrating Radar, Sanaz Esmaeili
USF Tampa Graduate Theses and Dissertations
Finding habitable places to keep astronauts safe from surface radiation, magnetic storms, and temperature fluctuations will be an important component of future planetary exploration missions. Remote sensing surveys on other planets indicate the presence of lava tubes. Ground Penetrating Radar (GPR) has shown great potential for detection of tunnels in terrestrial environments. In this research, the capabilities of this near surface rapid exploratory tool for detection of lava tubes are investigated. This dissertation describes terrestrial examples of how GPR can be utilized to explore tubes and addresses the capabilities of GPR for resolving tube-related features such as the floor, fractures, …
Factors Controlling Circulation At The Terminus Of A Shallow Seagrass-Dominated Estuary, Fort Desoto Bay, West-Central Florida, Charles Gray Vickery
Factors Controlling Circulation At The Terminus Of A Shallow Seagrass-Dominated Estuary, Fort Desoto Bay, West-Central Florida, Charles Gray Vickery
USF Tampa Graduate Theses and Dissertations
Fort DeSoto Bay is a shallow seagrass-dominated estuary located landward of Mullet Key that is home to the most extensive seagrass beds in all of Tampa Bay. During a period of development in the 1950s and early 1960s, the bay underwent extensive physical modifications, including the construction of earthen causeways and dredged channels, which altered the bathymetry of the seafloor and changed natural circulation patterns. The stagnation of water in the southern bay and increased estuarine residence time led to elevated summer temperatures, reduced dissolved oxygen levels, and die-offs of seagrasses. Two 40-foot circulation bridges were installed on each causeway …
Flow Dynamics In A Vadose Shaft – A Case Study From The Hochschwab Karst Massif (Northern Calcareous Alps, Austria), Eva Kaminsky, Lukas Plan, Thomas Wagner, Barbara Funk, Pauline Oberender
Flow Dynamics In A Vadose Shaft – A Case Study From The Hochschwab Karst Massif (Northern Calcareous Alps, Austria), Eva Kaminsky, Lukas Plan, Thomas Wagner, Barbara Funk, Pauline Oberender
International Journal of Speleology
Karst aquifers are highly vulnerable to contamination due to quick water flow through conduits. Their high heterogeneity and the poorly known infiltration effect of the vadose zone make quantification of recharge processes difficult. This study characterizes the water flow and storage in the upper vadose zone with almost four years monitoring of a permanent stream in a vadose shaft (Furtowischacht). Its small catchment of 4,500 m² is located in a former glaciated high Alpine environment (Hochschwab, Austria). High discharge fluctuations between 0.002 and 19 l/s, relatively high hydrograph recession coefficients, and transit velocities between 0.0015 and 2.4 m/s estimated with …