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 174 for “"vegetation index"”.
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Remote sensing, normalized difference vegetation index (NDVI), and crop yield forecasting
… and its derived products, Normalized Difference Vegetation Index (NDVI), to assess and quantify corn and soybean yield potential. Fixed-effect panel and ordinary least squares NDVI regression models were developed for different level of spatial aggregation. Through the regression analysis, the …
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Relationship between satellite-derived Normalized Difference Vegetation Index (NDVI) and surface hydrology
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering, 1998.
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Analyzing remote sensing-derived normal difference vegetation index to predict coastal protection by Spartina alterniflora
Coastal vegetation can provide protection to the coastline through its root structures, which reduce soil erosion, and its stem structures, which dissipate wave energy. The drag a plant induces could be used to quantify the amount of coastal protection that is provided. This study combined field …
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Analyzing Remote Sensing-Derived Normal Difference Vegetation Index to Predict Coastal Protection by Spartina alterniflora
Coastal vegetation can provide protection to the coastline through its root structures, which reduce soil erosion, and its stem structures, which dissipate wave energy. The drag a plant induces could be used to quantify the amount of coastal protection that is provided. This study combined field …
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The response of southern African vegetation to droughts in past and future climates
… climate change pose a threat to southern African vegetation. This study examines the response of southern African vegetation to drought in both past and future climates. Multiyear and multi-simulation datasets from three dynamic global vegetation models (DGVMs), namely, Community Land Model …
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Isolating the observed influence of vegetation variability of La Plata River basin on the climate of South America
… and quantify the local and remote influences of vegetation on the climate of South America using observational records. We find that the dominant mode of vegetation variability over the La Plata River basin in austral Spring is linked with warmer temperature and enhanced precipitation over …
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Analysis of Dryland Forest Phenology using Fused Landsat and MODIS Satellite Imagery
… data fusion products to the analysis of dryland vegetation phenology. The objective of the first study was to verify the quality of the output products of the spatial and temporal adaptive reflectance fusion method (STARFM) over the dryland Arizona study site. Synthetic 30 m resolution images …
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Identifying Forest Conversion Hotspots in the Commonwealth of Virginia using Multitemporal Landsat Data and Known Change Indicators
… effectiveness of using the Normalized Difference Vegetation Index (NDVI) derived from 1326 different Landsat Thematic Mapper and Enhanced Thematic Mapper images in finding isolated housing starts within the Commonwealth of Virginia's forests. Individual NDVI images were stacked by year for the …
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Hyperspectral Imagery for Precision Agriculture
… approach was the development of an automatic vegetation index generation algorithm---EAVI (Evolutionary Algorithm based Vegetation Index generation). The EAVI algorithm was applied to two precision farming applications---finding the temporal relationship between images and corn yield and …
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Monitoring Property Boundaries for the Appalachian National Scenic Trail Using Satellite Images
… Using Landsat TM images, Normalized Difference Vegetation Index (NDVI), and image difference change detection, this research shows that major boundary encroachments can be detected. Detection of sub-pixel vegetation index decreases identifies specific locations for field inspection. Assuming low …
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Characterizing Boreal Forest Fire Disturbance Boundaries Through Space And Time In Ontario
… compares wildland fire boundaries derived from vegetation index slopes with those provided by BorealDB a newly developed database that compiles consistent disturbance maps from 1972 to the present. BorealDB includes various attribute combinations and an ensemble confidence measure that shows how …
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Influence of nitrogen rate on corn grain yield, nitrogen use efficiency, and nitrate leaching on coarse-textured Minnesota soils
… uptake, leaf chlorophyll, normalized difference vegetation index (NDVI), grain yield, grain N, nitrogen use efficiency (NUE), basal stalk nitrate (BSN), and residual soil nitrate-N (RSN) were evaluated with respect to N rate. Nitrate-N leaching was monitored with suction tube lysimeters at three …
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Detection and attribution of drought and oil-induced plant stress using hyperspectral remote sensing
… remote sensing in detecting stress in vegetation caused by both drought stress and hydrocarbon contamination of the soil. Spectral and plant biochemical measurements were taken from an in-situ field experiment and a glasshouse experiment at the James Hutton Institute, Invergowrie, U.K. …
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From Hyperspectral Indices to Global Fluorescence: PACE Vegetation Indices as Predictors of Terrestrial Photosynthesis
… Color Instrument and globally distributed Land Vegetation Index (LANDVI) product suite. This study's primary contribution lies in demonstrating that PACE vegetation indices alone can reliably predict SIF from global retrievals obtained using data from the Copernicus Sentinel-5P Tropospheric …
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Predictive Modeling of Sugarbeet Quality Using Vegetative Index, Statistical, and Artificial Neural Network Methods
… (SMBSC) growing region.<br /> Vegetative index models used in this research consisted of the Normalized Difference Vegetation Index (NDVI), Green Normalized Difference Vegetation Index (GNDVI), and an index that is similar to the GNDVI, the Mid-infrared band 5 NDVI (M5NDVI). This index …
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Estimating Sources of Valley Fever Pathogen Propagation in Southern Arizona: A Remote Sensing Approach
… with a combination of surface temperature, a vegetation index and its texture, and a suite of topographic rasters. Surface temperature, derived from Landsat TM thermal images, is the most widely selected predictive variable in both automated methods. Construction-related soil disturbance (e.g. …
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Evaluating the suitability of UAV data for mapping dominant plant species in a heterogenous fynbos seep wetland
… global prominence as affordable platforms for vegetation inventory studies. However, the potential use of UAVs for Fynbos wetland inventory has not been explored. This study used multispectral UAV photography from Parrot Sequoia and Micasense RedEdge- M multispectral cameras to discriminate …
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Multispectral Remote Sensing of the Earth and Environment Using KHawk Unmanned Aircraft Systems
… (CIR) maps. A robust Normalized Difference Vegetation index (NDVI) calibration procedure is proposed and validated by ground tests and KHawk flight test. Finally, the generated aerial maps and their corresponding Digital Elevation Models (DEMs) are used for typical application scenarios …
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Predicting Corn Response to Variable Synthetic Fertilizer Treatments Using UAV-Derived Imagery
… ± 26 nm, red-edge: 730 nm ± 16 nm). UAV-derived vegetation indices (VIs) responsive to Chl and indicative of crop yield potential were computed to model ChlR and yield through single and multi-index regression analyses. Multi-index model performance was evaluated through repeated k-fold …
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The Association Between Environmental Factors and the Risk of Paediatric Inflammatory Bowel Disease
… greenspace (through the normalized difference vegetation index) were obtained based on residential six-digit postal code. Results: Exposure to oxidant capacity during childhood and mid-pregnancy was associated with increased risk of IBD <18 years. No association for other pollutants was found. …
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