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Articles 1 - 24 of 24
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Trends Of Autumn Phenology In Response To Environmental And Meteorological Variables, Meagan Renee Maguire
Trends Of Autumn Phenology In Response To Environmental And Meteorological Variables, Meagan Renee Maguire
Masters Theses
Previous studies have identified that changes in plant phenology are most likely induced by climate variability. One such change is the end of season (EOS) for deciduous forests in the United States. In essence, the EOS represents the end of plant productivity for a given year; the phase in which plant dormancy is reached. However, our wealth of knowledge on plant phenology largely overlooks the phases that occur in autumn, especially the EOS, with many previous studies focusing on spring phenology. This study uses remote sensing MODIS aerial imagery data and historical meteorological data to analyze any relationships that may …
Analysis Of Small Lake Water Level Fluctuations By Remote Sensing In Twin Lake, Michigan., Eric Carballido
Analysis Of Small Lake Water Level Fluctuations By Remote Sensing In Twin Lake, Michigan., Eric Carballido
Masters Theses
Accurate analysis of lake level fluctuations is critical for water resources management. However, it remains a challenge to estimate lake level fluctuations in ungauged small lakes such as East Twin Lake. Located in Twin Lake, Michigan, East Twin Lake has experienced a drastic reduction in water surface area since 2020. To understand the nature of water level fluctuations in East Twin Lake, this study utilized a combination of Landsat and National Agriculture Imagery Program (NAIP) data to make surface water area estimations of East Twin Lake for the period of 1993-2022. In total, 27 years of water surface area estimations …
Short-Term 2d And 3d Geomorphic Change Detection At A Public Park On Lake Michigan Using Uas Remote Sensing Techniques, Scott Patrick Fitzgerald
Short-Term 2d And 3d Geomorphic Change Detection At A Public Park On Lake Michigan Using Uas Remote Sensing Techniques, Scott Patrick Fitzgerald
Masters Theses
The high-water level of Lake Michigan (LM) in the past few years has led to significant periods of erosion and increased the risk to private property owners on the coast. To cope with this, many property owners on the coast of LM have constructed coastal protections, some opting for seawalls. Previous studies have assessed the effects of seawalls but disagreed on their impacts, and only laboratory studies were able to establish their range of influence. Using a different method to study their effects will be pertinent to understanding them.
This research aims to use a higher temporal and spatial resolution …
Integrating Remote Sensing And Model-Based Datasets In A Machine Learning Model To Map Global Subsidence Associated With Groundwater Withdrawal, Md Fahim Hasan
Integrating Remote Sensing And Model-Based Datasets In A Machine Learning Model To Map Global Subsidence Associated With Groundwater Withdrawal, Md Fahim Hasan
Masters Theses
"Quantifying groundwater storage loss is becoming increasingly essential globally due limited availability of this major hydrologic component and its long recharge time. Groundwater overdraft gives rises to multiple adverse impacts including land subsidence and permanent groundwater storage loss. In absence of spatially dense monitoring network, publicly available in-situ data, and uniform monitoring strategies, it is challenging to assess the sustained losses from overexploitation of this resource. Remote sensing based techniques have the capacity to fill this gap to increase our groundwater monitoring capacities. Exploring the interrelation between groundwater pumping and land subsidence using remote sensing datasets can be a very …
Spatiotemporal Distributions Of Sargassum On Grand Cayman, Graeme Timmeney
Spatiotemporal Distributions Of Sargassum On Grand Cayman, Graeme Timmeney
Masters Theses
This mixed methods research examines individual perceptions of Sargassum on Grand Cayman’s beaches in 2020 using participant mapping, and semi – structured interviews. Results from the participant mapping are compared to satellite detection of sargassum. Sargassum poses health risks to both humans and the natural environment. Decaying Sargassum produces sulfuric gas and prevents young turtle hatchlings from reaching the ocean. Since 2011, Sargassum has diffused beyond the Sargasso Sea into entirely novel locations, spanning from the west African Coast to the Gulf of Mexico. Increased biomass has proven to be overwhelming for many Caribbean Islands, including Grand Cayman where hundreds …
Spatiotemporal Observations Of Water Stress In Kansas Winter Wheat And Corn From Remotely Sensed Evapotranspiration And Ndwi, Lindi Diane Oyler
Spatiotemporal Observations Of Water Stress In Kansas Winter Wheat And Corn From Remotely Sensed Evapotranspiration And Ndwi, Lindi Diane Oyler
Masters Theses
"Optimizing water use is a growing concern, especially in agricultural communities where water use is high. An important challenge in agricultural water optimization is knowing when and where crop water stress is occurring, particularly on large scales where in-situ measurements are no longer practical to obtain. In an effort to combat this challenge, this study utilizes remotely sensed evapotranspiration (ET) and Normalized Difference Water Index (NDWI) to evaluate the responses of integrated satellite datasets to water-stressed conditions over fields of irrigated corn, irrigated winter wheat, and rainfed winter wheat from 2007 to 2017 in southwestern Kansas. Using two different ET …
Identifying Smokestacks In Remotely Sensed Imagery Via Deep Learning Algorithms, Kenneth Moss
Identifying Smokestacks In Remotely Sensed Imagery Via Deep Learning Algorithms, Kenneth Moss
Masters Theses
Locating smokestacks in remote sensing imagery is a crucial first step to calculating smokestack heights, which allows for the accurate modeling of dioxin pollution spread and the study of resulting health impacts. In the interest of automating this process, this thesis examines deep learning networks and how changes in input datasets and network architecture affect image detection accuracy. This initial image detection serves as the first step in automated object recognition and height calculation. While this is applicable to general land use classification, this study specifically addresses detecting smokestack images. Different dataset scenarios are generated from the massive Functional Map …
The Urban Morphology Of Hyderabad, India: A Historical Geographic Analysis, Kevin B. Haynes
The Urban Morphology Of Hyderabad, India: A Historical Geographic Analysis, Kevin B. Haynes
Masters Theses
Hyderabad, India has undergone tremendous change over the last three centuries. The study seeks to understand how and why Hyderabad transitioned from a north-south urban morphological directional pattern to east-west during from 1687 to 2019. Satellite-based remote sensing will be used to measure the extent and land classifications of the city throughout the twentieth and twenty-first century using a geographic information science and historical-geographic approach. This approach provides the basis for a structured archival historical-geographic analysis. Focusing on Hyderabad, India from 1687 to 2019, the objectives of this research are to: (1) delineate and quantify the geographic extent of built-up …
An Evaluation Of Unmanned Aerial Systems And Structure-From-Motion For Fluvial Large Wood Sensing And Risk Assessment, Daniel Gerke
An Evaluation Of Unmanned Aerial Systems And Structure-From-Motion For Fluvial Large Wood Sensing And Risk Assessment, Daniel Gerke
Masters Theses
This research aims to show Unmanned Aerial System (UAS) and Structure-from-Motion (SfM) technology can, in combination, improve on traditional large wood (LW) monitoring techniques. More temporally and economically efficient data collected at a finer spatial resolution and greater spatial extent will increase the effectiveness of management plans and risk assessment for LW by providing decision-makers with a complete picture of the river.
Contemporary practices are too inefficient in time and labor for large-scale monitoring of fluvial LW with anything more than the most general management or risk assessment in mind. The paradigm of river research, the river continuum concept (RCC), …
Using Landsat Phenology Curves To Characterize Post-Fire Forest Responses In South Carolina, Usa, Miranda Brooke Rose
Using Landsat Phenology Curves To Characterize Post-Fire Forest Responses In South Carolina, Usa, Miranda Brooke Rose
Masters Theses
Characterizing forest responses to disturbance over large geographic areas represents one of the most challenging aspects of ecosystem monitoring. Traditional remote sensing methods often assess annual or biennial forest change after a disturbance, selecting one image for every year or two years for the study period. However, by using multiple images per year, researchers can examine intra-annual vegetation patterns, or phenology. Phenology provides information on the timing of vegetation events, such as the onset of greenness and the amplitude of NDVI, which can then be used to classify vegetation communities and characterize land cover change over time. Using all available …
Using Remotely Sensed Imagery To Examine Changing Urban Land Cover Across Time And Topography: A Study Of Nepal’S Kathmandu Valley, Rajesh Sigdel
Using Remotely Sensed Imagery To Examine Changing Urban Land Cover Across Time And Topography: A Study Of Nepal’S Kathmandu Valley, Rajesh Sigdel
Masters Theses
The Kathmandu Valley, located in Nepal, is the most rapidly growing demographic region in the country. With this demographic transformation, urban land is also expanding within the valley. It is important to understand the rate and extent of urban land cover change for effective land use planning. This study analyzed the urban land cover change in the Kathmandu Valley in 1990, 2006, and 2018 using remote sensing. It also analyzed the shift in the urban topography of the valley during the same period. Landsat 5 and Landsat 8 were used to study the transformation of urban land cover in the …
The Use Of High And Medium Resolution Imagery To Detect Agricultural Land Cover In Chinese Cities: A Case Study Of Nanjing 2000 To 2015, Erik Breidinger
The Use Of High And Medium Resolution Imagery To Detect Agricultural Land Cover In Chinese Cities: A Case Study Of Nanjing 2000 To 2015, Erik Breidinger
Masters Theses
According to McGee and Ginsburg’s desakota hypothesis, rapidly growing Asian cities differ from large Western cities in their land cover/land use (LC/LU) as they retain a significant portion of agricultural land and labor despite rapid urbanization. However, significant amounts of agricultural production within desakotas takes place in plastic greenhouses, causing a unique problem when calculating LC/LU estimates via traditional remote sensing techniques. While greenhouses appear equivalent to developed land spectrally, their purpose is entirely agricultural. This study provides an improved method of calculating greenhouse land-cover as agricultural land-use using Jiangning District in the city of Nanjing as the study area …
The Effects Of Deforestation On Carbon Storage In Khabarovsk Krai, Russia, Rowan E. Cole
The Effects Of Deforestation On Carbon Storage In Khabarovsk Krai, Russia, Rowan E. Cole
Masters Theses
With over one-fifth of the planet’s forested area, Russia has become a major source of round wood and wood products. In 2003, the Russian government established an energy policy aimed at reducing the negative impacts of industry on the environment and improving the nation’s environments as a whole. This study analyzes deforestation and logging activities in the forests along the Amur River in Khabarovsk Krai in the Russian Far East to determine the effectiveness of Russian government policy in achieving the goals put forward in the 2003 energy policy. Changes in land-use and land-cover will be assessed using 500-meter resolution …
Insar Simulations For Swot And Dual Frequency Processing For Topographic Measurements, Gerard Masalias Huguet
Insar Simulations For Swot And Dual Frequency Processing For Topographic Measurements, Gerard Masalias Huguet
Masters Theses
In Earth remote sensing precise characterization of the backscatter coefficient is important to extract valuable information about the observed target. A system that eliminates platform motion during near-nadir airborne observations is presented in this thesis, showing an improvement on the accuracy of measurements for a Ka- band scatterometer previously developed at Microwave Remote Sensing Laboratory (MIRSL). These very same results are used to simulate the reflectivity of such targets as seen from a spaceborne radar and estimate height errors based on mission-specific geometry. Finally, data collected from a dual-frequency airborne interferometer com- prised by the Ka-band system and an S-band …
Remote Characterization Of Physical Surface Characteristics Of Mars Using Diurnal Variations In Apparent Thermal Inertia, Cameron Blake Mccarty
Remote Characterization Of Physical Surface Characteristics Of Mars Using Diurnal Variations In Apparent Thermal Inertia, Cameron Blake Mccarty
Masters Theses
Analysis of the Martian surface today can provide insight into the processes that may have affected it over its history. Information about the physical surface characterization of a region can help determine the degree of sorting it has experienced and/or its geologic maturity. Sub-resolved “checkerboard” mixtures of materials with different horizontal thermal inertia mixtures can lead to differences in the apparent thermal inertia values inferred from night and day radiance observations. Standard methods for deriving thermal inertia from orbit via the THermal EMission Imaging System (THEMIS) can give values for the same location that vary by as much as 20% …
The Influence Of Matrix Contrast On Species Richness In Fragmented Landscapes, Ian Reider
The Influence Of Matrix Contrast On Species Richness In Fragmented Landscapes, Ian Reider
Masters Theses
Habitat destruction is the leading threat to biodiversity worldwide, causing once continuous landscapes to become fragmented and isolated and harming the persistence of biodiversity. Our goal was to determine how species richness in fragmented forest landscapes is influenced by the vegetation density of the surrounding matrix. We gathered existing studies of fragmented landscapes with Species Area Relationship (SAR) data and analyzed the landscape vegetation in each study site using satellite imagery in ArcGIS. We investigated to see how contrast between vegetation density in matrix versus forested habitat areas correlated to the strength of the SAR for the 45 study landscapes …
Evaluating Features For Broad Species Based Classification Of Bird Observations Using Dual-Polarized Doppler Weather Radar, Sheila Werth
Evaluating Features For Broad Species Based Classification Of Bird Observations Using Dual-Polarized Doppler Weather Radar, Sheila Werth
Masters Theses
Wind energy is one of the fastest-growing segments of the world energy market; however, wind energy facilities can have detrimental effects on wildlife, especially birds and bats. The ability to monitor vulnerable species in the vicinity of proposed wind sites could enable site selection that favors more vulnerable species, but current monitoring tools lack this classification capability. This work analyzes polarimetric and Doppler measurements of migrating birds for species based variation.
A novel two stage feature extraction technique was developed to enable comparison between birds. Stage one involves mapping time changing radar measurements to the birds behavioral state in time …
Quantifying Gully Erosion In West Tennessee Using High Resolution Lidar Data, John James Mcnelis
Quantifying Gully Erosion In West Tennessee Using High Resolution Lidar Data, John James Mcnelis
Masters Theses
This research demonstrates the use of Light Detection and Ranging (LIDAR) for detailed measurement of volume change and erosional and depositional processes within a small gully and assessing the impact of digital elevation model (DEM) resolution on these measurements. The study site is an active gully in Meeman-Shelby Forest State Park in Tennessee, USA. DEMs were derived from an airborne LIDAR survey and multiple terrestrial LIDAR scans. DEM differences were used to quantify gross volumes of erosion and deposition within the gully over a three year period and a 49 day period. Analysis of the airborne LIDAR point cloud indicated …
A Remote Sensing Based Early Warning System For Algal Blooms In Kuwait Bay And Coastal Waters, Cameron Manche
A Remote Sensing Based Early Warning System For Algal Blooms In Kuwait Bay And Coastal Waters, Cameron Manche
Masters Theses
The Kuwait Bay and its coastal waters are being threatened by a perpetual hazard, the proliferation of harmful algal blooms (HABS). The frequency of HAB occurrences is a growing problem that is only reported subsequent to the onset of a HAB event. Little effort has been invested in investigating the spatial and temporal distribution of these events in Kuwait Bay and even less is known about their controlling factors. All previous studies within the Kuwait Bay have focused either on measuring nutrient availability and the biodiversity of algal species.
The overall study objective is four-fold: (1) to monitor the spatial …
Predictive Modeling In The Search For Vertebrate Fossils: Geographic Object Based Image Analysis (Geobia) In The Eocene Of Wyoming, Bryan Bommersbach
Predictive Modeling In The Search For Vertebrate Fossils: Geographic Object Based Image Analysis (Geobia) In The Eocene Of Wyoming, Bryan Bommersbach
Masters Theses
The development and testing of predictive models for identifying productive fossil localities represents a promising interdisciplinary endeavor among geographic information scientists, paleoanthropologists, and vertebrate paleontologists. This thesis analyzed high resolution (2m spatial resolution) commercial satellite imagery from the Worldview-2 satellite of five areas of the Great Divide Basin using a GEographic Object-Based Image Analysis (GEOBIA) technique, which segments the image into spectrally homogeneous, multi-pixel image objects. In addition to allowing statistical analysis of the spectral characteristics of the image objects, GEOBIA techniques also let analysts incorporate expert knowledge and contextual information to improve classification accuracy. The spectral characteristics of the …
A Remote Sensing Investigation Of Elevated Sub-Horizontal Topographic Surfaces In The Wichita Mountains, Oklahoma, Liang Xue
Masters Theses
"Multiple elevated horizontal to sub-horizontal topographic surfaces are present in the Wichita Mountains, Oklahoma. Elevated topographic surfaces, developed primarily on granite bedrock with gentle slopes of 0.5 to 7⁰,were investigated using 1) Digital Elevation Models (DEMs) extracted from NAD 27 UTM coordinates, 2) Google Earth imagery, and 3) USGS topographic maps. In the western Wichita Mountains prominent topographic surfaces at elevations of 720 ± 5 m, 685 ± 5 m, and 660 ± 5 m are well preserved on at least four different mountains (e.g., Solder's Peak, King Mt.) and can be correlated with similar surfaces on at least seven …
Response Of Inland Lakes To Climate Change Across The Tibetan Plateau Investigated Using Landsat And Icesat Data, Zewen Liu
Masters Theses
The Tibetan Plateau experienced tremendous climate change during the past four decades. Due to the large size, widely distribution of cryosphere, and diverse landforms, different parts of the plateau may experience different climate and cryosphere changing patterns. The changes of inland lakes within the plateau are important indicators of climate change as these lakes are fed by precipitation, permafrost degradation, and glacier melting that are all sensitive to climate change. To examine the spatial and temporal differences of lake variations across the Tibetan Plateau, Landsat images and ICESat/GLAS altimetry data were used to extract the changes in surface areas of …
Prospects For An International Charter "Space And Major Disaster" Remote Sensing Response To Drought Disasters - An Anhui, China Case Study, Joseph Burkhead
Prospects For An International Charter "Space And Major Disaster" Remote Sensing Response To Drought Disasters - An Anhui, China Case Study, Joseph Burkhead
Masters Theses
Remote sensing is often leveraged during the response phase of disaster management to improve the situational awareness of decision-makers. The International Charter "Space and Major Disaster" (Charter) provides remote sensing support to non-spacefaring nations facing disasters such as earthquakes, floods and tsunamis. However, the Charter has never activated for a major drought disaster. Since droughts affect over half of the nearly 3 billion people that suffer from natural disasters annually, this study seeks to determine whether satellite remote sensing can be effectively employed according to the intent, capabilities, and limitations of the Charter to benefit officials responding to a major …
Land Use/Land Cover Change And Its Hydrological Impacts From 1984 To 2010 In The Little River Watershed, Tennessee, Chunhao Zhu
Land Use/Land Cover Change And Its Hydrological Impacts From 1984 To 2010 In The Little River Watershed, Tennessee, Chunhao Zhu
Masters Theses
Land use/land cover (LULC) change, especially the conversion from farmland to residential and commercial land, has led to significant environmental issues in changing fluvial dynamics, accelerating sediment erosion and degrading water quality. The Little River, which provides drinking water for over 100,000 residents in Blount County, Tennessee, and serves as a source of agriculture and recreational activities, was listed as one of the U.S. Environmental Protection Agency’s (EPA) Targeted Watersheds because the water quality of its tributaries has become impaired due to several reasons. In this study, a detailed record of LULC change in a roughly 2-year interval was documented …