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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 350 for “"Subsidence"”.
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Modelling of Subsidence in Geothermal Fields
Subsidence is an environmental issue at New Zealand geothermal fields, particularly Wairakei. It has resulted in submissions to geothermal resource consent hearings, subsequent operational consent conditions and long-term monitoring programs. Wairakei geothermal field has a complex subsidence …
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Tectonic subsidence analysis of the Williston Basin
… of North American intracratonic basins whose subsidence is poorly understood. The Basin is circular in shape and contains nearly 5 km of preserved sedimentary rocks at its center; ranging from Cambrian to Tertiary in age. The Basin's subsidence is investigated quantitatively using the …
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Surface Subsidence Due to Coal Mining in Illinois
Subsidence of the land surface has been associated with coal mining in Illinois since the early days of the industry. Investigations of subsidence damage began in Illinois more than 100 years ago. However, over the years there has been very little scientific or engineering documentation of …
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Monitoring of oil-production-induced subsidence and uplift
… to the monitoring of oil-production-induced subsidence and uplift in the Republic of Kazakhstan and elsewhere.
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Sand compression as a factor in oil field subsidence.
Massachusetts Institute of Technology, Dept. of Civil Engineering, Thesis. 1965. Sc. D.
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Interaction effects due to subsidence in multiple seam mining
… have not been extracted in descending order, is subsidence. This investigation examines the affects of subsidence not on the surface but on mineable seams of coal lying above the seam that has been extracted. Case studies were collected from the Appalachian region. These studies were analyzed to …
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A study of longwall subsidence in the Appalachian coalfield
Surface subsidence is an inevitable consequence of most underground coal mining. The United States Bureau of Mines has estimated that over 3,000 square miles of land in this country have been affected by subsidence, and it is currently estimated that an additional 2,400 to 3,800 square miles will …
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Geophysical constraints on the flexural subsidence of the Denver Basin
… The gravity anomaly associated with flexural subsidence of the basin, assuming the layered density structure derived from the spectral analysis, is calculated to reach a minimum of -60 mGal, only 15 % of the observed Bouguer gravity anomaly. The magnitude of the load is less than the present …
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Spatial and Temporal Variability of Subsidence: Fort Bend County, Texas
… revealing the evolution and magnitude of land subsidence in Fort Bend County (FBC) through 2014. Subsidence in the greater Houston metropolitan area has been monitored since 1926 and several generations of maps have portrayed more than three meters of subsidence. Recent studies indicate that …
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GPS Monitoring and Land Subsidence in the Houston Metropolitan Area
… Houston metropolitan area and conducting precise subsidence and faulting monitoring over time and space, (2) evaluate the effects of groundwater withdrawal on land subsidence, and (3) assess the possible effect of petroleum production on ongoing minor subsidence within Galveston County. In order …
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Quantitative textural analysis of sedimentary grains and basin subsidence modelling
… sedimentary studies. Part 2: Basin modelling Subsidence modelling is an important part of basin analysis to better understand the tectonic evolution of sedimentary basins. The McKenzie model has been widely applied for subsidence modelling and stretching factor estimation for sedimentary …
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A time-varying subsidence parameterization for the atmospheric boundary layer
… effect of a time-varying parameterization for subsidence in the atmospheric boundary layer (ABL) on a one-dimensional coupled land-atmosphere model. Measurements of large-scale divergence in the ABL are scarce and often marred by error, providing the motivation to model this important physical …
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Effects of delayed drainage on subsidence modeling and parameter estimation
The use of delayed drainage in land subsidence modeling greatly complicates model calibration, particularly when the thickness of the fine-grained interbeds varies throughout the modeled region. This thesis documents two separate projects (chapters) related to the use of delayed drainage in …
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The Prediction and Occurrence of Chimney Subsidence in Southwestern Pennsylvania
… degraded over half of Pennsylvania's counties. Subsidence incidents, known as chimney caves, are in the form of sinkholes and develop above abandoned room-and-pillar mines. Chimney caving is the most dominant type of subsidence in southwestern Pennsylvania, yet there are no accurate means …
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Longwall mining, subsidence, and protection of water resources in Virginia
… greater than conventional methods. However, subsidence caused by Iongwall mining has been blamed for, among other things, damaging wells, springs, and streams above the mines. Surface landowners whose water supplies are affected by Iongwall mines may negotiate with mining companies for …
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Spatial variability of peat subsidence in Southeast Asia by land use
… in environmental parameters such as peat subsidence in two dimensional space, but also to understand the factors governing these variations. With the deforestation and drainage of wetlands in Southeast Asia, there has been a gradual sinking across large areas of land (i.e. subsidence). …
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Carbon fluxes from tropical peatlands : methane, carbon dioxide, and peatland subsidence
… enables peat decomposition and results in subsidence of the land surface. We track this subsidence using InSAR satellite data and use it to quantify regional CO₂ emissions. The spatial resolution of our technique allows us to uncover correlations with past and present land uses and peatland …
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