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 20 of 60 for “"Tree Canopy"”.
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Urban Tree Canopy Assessments in the Chesapeake Bay Watershed
An urban tree canopy assessment (UTCA) is a new technology that can inform management decisions to optimize the economic, social and environmental benefits provided by urban forests. A UTCA uses remote sensing to create a comprehensive spatial snapshot of a locality's land cover, classified at a …
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Tree Canopy Effects on Roof-Harvested Rainwater in East Texas
… collected from roofs without any overhanging tree vegetation, rainwater collected from roofs under predominantly Southern yellow pine tree cover, and rainwater collected from roofs under predominantly hardwood tree cover. Rainwater was collected from these roofs for one year. The effects of …
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Insolation transmission through a deciduous tree canopy: a winter study
This study measures the shading properties of tree branches as they affect the amount of available sunlight (insolation) reaching structures placed within the visible tree shadow. Measurement was accomplished by placing a grid in throughout the entire shadow pattern formed, by each study tree …
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Methods for the spatial modeling and evalution of tree canopy cover
Tree canopy cover is an essential measure of forest health and productivity, which is widely studied due to its relevance to many disciplines. For example, declining tree canopy cover can be an indicator of forest health, insect infestation, or disease. This dissertation consists of three studies, …
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Tree Canopy Cover Response to Land Development Policies in Fairfax County
Urban tree canopy cover is important because it mitigates negative impacts of urbanization such as urban heat and stormwater. Land development leads to canopy loss through tree removal, but some localities have regulations in place that require trees to be retained or replanted during development. …
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Evaluating Columbus, Georgia, Tree Canopy Interactions with Air Pollutants Using High Spectral Imagery and Portable PM Sensors
<p>Trees provide environmental, economic, and social advantages in urban areas. Knowing the extent and location of tree canopy in a municipality is an important step in quantifying these benefits. Spatial and temporal tree canopy analysis was performed for the city of Columbus, Georgia, by …
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Applications of deep learning and computer vision in large scale quantification of tree canopy cover and real-time estimation of street parking
… to image and video data to quantify urban tree cover and street parking utilization. Large-scale and accurate quantification of urban tree cover is important towards informing government agencies in their public greenery efforts, and useful for modelling and analyzing city ecology and urban …
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Influence of Social and Environmental Factors on FEMA Claims During Flood Disasters in St. Louis, MO.
… which were drawn from the literature. Elevation, tree canopy, impervious surface, and redlining variables were positively associated with an increase in the flood claims by precipitation. Elevation and tree canopy provided counterintuitive results, which require future investigation. The findings …
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Mapping urban forest extent and modeling sequestered carbon across Chattanooga, TN using GIS and remote sensing
… in the biomass of Chattanooga’s urban trees using field data and vegetation indices, and finally 3) developed the first city-wide high-resolution land cover map across Chattanooga using SkySat imagery and object-based classification. Results found that Chattanooga has lost up to 43% of …
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New methods to improve detection and classification on waterfowl and tree in aerial images
… the time and effort required for annotation. Tree canopy classification, another focus of this dissertation, holds great po- tential for monitoring environmental diversity and stability. While trees can be categorized by family, genus, and species, existing classifiers often overlook the hi- …
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Towards reconstructing cities with AI: a novel machine learning approach for automated archaeological surveying and preservation by learning canopy structures
… (AASM) that utilizes machine learning to analyze tree canopy structures as proxies for underlying archaeological features. Using a LiDAR-derived digital canopy model (DCM), the Bi-path Ensemble (BPE) model predicts the locations of the land-use typologies of "public" and "private" space at …
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Environmental Planning, Urban Development, and the Making of Environmental Injustice in Minneapolis
… an analysis of patterns of urban heat and tree canopy cover relative to the historic geographies of racial covenants and the HOLC redlining maps in Minneapolis, MN. The final chapter considers contemporary green gentrification and the re-entrenchment of patterns of environmental injustice. …
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Ecosystem impacts of tamarisk (Tamarix spp.) management in the Arkansas River watershed, Colorado: effects of disturbance and herbicide residues on passive plant community restoration
… combinations of herbicides and mechanical tree removal. Successive chapters detail laboratory, greenhouse and field experiments that determined the ecological impacts of currently used tamarisk control strategies, with a particular emphasis on the effects of herbicide residues on plant …
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The Amenity Value of Trees: a Meta-analysis of Hedonic, Property-value Studies
Tree species migration as a result of climate change may alter the composition of trees in local communities. Shifts in tree diversity, stand age, species predominance and the overall number of trees are potential changes. Community tree programs may also change the characteristics of local trees …
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Do trees suppress grass fuel loads? : canopy cover effects in South African savannas
… biome indicated that fire did not spread at tree canopy cover above 40%. This study investigates this relationship in a field study. It is possible that the type of tree (forest vs. savanna) may influence the amount of shade experienced by the understory and therefore this study also explores …
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Dancing About Architecture: Choreographing the Anacostia Waterfront
… relationship between dance, architecture, and trees to create an experience that would be enjoyed by the community and to bring people to Anacostia, which has historically been a neglected part of the city. The Anacostia Redbud Festival will be the waterfront's own version of the Cherry Blossom …
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Does Urbanization Facilitate the Establishment of Introduced Monk Parakeet (Myiopsitta monachus) Populations?
… associations across the United States. I used tree canopy cover and percent impervious surface data from the 2016 National Land Cover Database GIS layers, surface water features from the National Hydrography Dataset, and observations and location data from eBird to find nest locations that were …
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Rodent Mediated Seed Dispersal of Joshua tree (Yucca brevifolia)
The Joshua tree is a charismatic and popular symbol of the Mojave Desert. Despite its popularity, we know little about the ecology of this species. The seed dispersal of Joshua tree, in particular, has not been thoroughly studied to this point. Here I examine the possible mechanisms acting to …
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Maximum Entropy Modeling of Indiana Bat (Myotis Sodalis) Maternity Roost Habitat
… associated with Indiana bat maternity roost trees in an attempt to better understand what factors play a role in their distribution in north central Missouri. I tracked reproductive female Indiana bats to 20 different primary and secondary roost trees; these are roosts that had multiple bats …
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Evaluating heat mitigation by urban canopy in New York City’s public housing developments
… into the ecosystem services provided by urban canopy that aims to characterize the temperature reduction provided by urban forests and develop process-level understanding of vegetation response to heat waves in order to improve estimates of heat mitigation in the face of extreme heat.</p> …
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