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 15 of 15 for “"elevation change"”.
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GIS Modeling of Wetlands Elevation Change in Response to Projected Sea Level Rise, Trinity Bay, Texas
This study is a test of a methodology to predict changes in elevation and shoreline position of coastal wetlands in Trinity Bay, Texas, in response to projected sea level rise. The study combines numerical modeling and a geographic information system. A smoothing technique is used on a United …
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Comparing Newly Built Wetlands in the Atchafalaya Bay, Louisiana and Sacramento-San Joaquin Delta, California
<p>This research investigated patterns in elevation change in newly built wetlands in the Atchafalaya delta, and newly restored wetlands in the Sacramento-San Joaquin River delta. RSETs were used to measure small changes in elevation, and soil cores were processed to examine mineral and organic …
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Object-Based Coastal Morphological Change Analysis Based on LiDAR and Hurricane Events
… further investigation and quantifying of coastal changes and responses. Light detection and ranging (LiDAR) is the most advanced technology to be widely used by researchers for coastal geomorphological studies. The purpose of this study is to apply an object-based approach using repeated LiDAR …
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Hazard Identification and Coastal Stratigraphy in Crescent Harbor, Northeast Whidbey Island, Washington
… records evidence of co-seismic land-level change 1825 to 1925 cal. yrs. BP. The lithostratigraphy and diatom microfossil assemblages reveal a marsh peat abruptly overlain by intertidal mud, indicating rapid subsidence. Analysis of the modern-day position of depositional facies indicates …
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Three applications of satellite borne repeat pass SAR interferometry in Southern Africa
… can be used to derive precise topographic height change information over large areas. It is a technique which has been used in a great variety of situations, from the topographic mapping of Venus to the detection of subtle ground deformations due to earthquakes and mining subsidence. The InSAR …
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Growth of juvenile lodgepole pine in relation to soil and slope
… percent silt plus clay in the soil profile, and elevation change per chain. Analysis of variance tests end multiple regressions were applied to the data. Six multiple regressions using tree heights in 1946, 1949, 1952, 1955, 1958, and 1961 as the dependent variables were analyzed. Position of …
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Assessing the uncertainties of Radar and LiDAR derived digital elevation information over static and dynamic terrain
… over time on a global scale. Digital Elevation Information is a necessity for any scientific and engineering project that involves terrain, urban planning, and monitoring of natural hazards. The accuracy of Digital Elevation Information is influenced by systematic errors which may be …
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Quantifying seasonal snow using very-high-resolution stereo optical satellite images
… it has global applications for quantifying changes in surface elevation with sub-meter-scale magnitudes. With decimeter-scale accuracy (RMSE 0.3 m), satellite stereo collections may offer accurate basin-scale estimates of snow distributions.
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Reconstructing the Surge History and Dynamics of Fisher Glacier, Yukon, 1948-2022
… This study uses remotely sensed imagery, digital elevation models, glacier velocity datasets, and in situ oblique photographs to reconstruct the surge history and dynamics of Fisher Glacier to better characterize surging in the southwest Yukon and assess the risk posed by this glacier’s surges on …
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Precipitation prediction over High Mountain Asia using Gaussian processes
… communities adapt to the challenges of climate change. This thesis discusses the application of probabilistic machine learning to better understand and predict precipitation in this area. Probabilistic methods quantify our knowledge of precipitation and improve decision-making under uncertainty. …
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Controls on post-High Park Fire channel response, South Fork Cache la Poudre Basin, Colorado
… surveys were performed to evaluate event-driven changes. The dominant response in both basins post-fire was net degradation. Steep channel slopes promoted channel incision with no significant overbank deposition, indicating that the channel network was a substantial source of sediment and an …
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Bee Abundance Along a Tropical Montane Elevational Gradient and Implications for Crop Pollination Services
… are expected to be highly responsive to climate change due to their short life cycles that are strongly influenced by temperature. Plants depend on pollinators to set seed and reproduce, and many animal populations rely on the resources provided by flowering plants. There is an urgent need to …
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Utilisation of remote sensing for the study of debris-covered glaciers: development and testing of techniques on Miage Glacier, Italian Alps
… ‘clean’ glaciers and their response to climatic change is uncertain. Remote sensing, integrated with field data, offers a powerful but as yet unrealised tool for studying and monitoring changes in debris-covered glaciers. Hence, this thesis focuses on two key aims: i) to test the utility of …
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Multifunctional experimental assessment in a newly established Mediterranean restored marsh : marsh elevation, carbon accumulation and pollutant concentration reduction
… benefits of the restored marsh providing marsh elevation, C accumulation and pollutant removal services. This study indicates that Mediterranean oligohaline restored marshes might buffer flooding risk dealing with sediment deficit and RSLR in the Ebro Delta due to high mean rates of vertical …
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Elevation Changes in Greenland over Two Decades from Cross-Platform LIDAR Analysis
… systems that retrieve information about surface elevation and roughness. Both altimeters have been flown in Greenland to measure changes in ice sheet surface elevation through time. ATM surveys in the region have been conducted nearly every year since 1993, with extended, annual coverage by ATM …