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 18 of 18 for “"terrain analysis"”.
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Digital terrain analysis to predict soil spatial patterns at the Hubbard Brook Experimental Forest
Topographic analysis using digital elevation models (DEMs) has become commonplace in soil and hydrologic modeling and analysis and there has been considerable assessment of the effects of grid resolution on topographic metrics using DEMs of 10 m resolution or coarser. However, examining fine-scale …
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Identifying Locations Of Highly Eroded Agricultural Land In The Devils Lake Basin, ND Using GIS Terrain Analysis Modeling
<p>Soil erosion modeling using terrain analysis holds great potential due to the simplicity of the models, and the ease in running the analysis in a GIS. Terrain analysis of the upper Devils Lake basin was conducted using a 3-meter Light Detection and Ranging-derived digital elevation model. …
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Integrating basic remote sensing, terrain analysis and geostatistical methods to generate spatially explicate continuous soil attribute maps for Fraser Experimental Forest
… Information Systems (GIS) and geostatistical analysis to further quantify the complex spatial relationships of soils and landscapes. These advances have resulted in a new field of study termed pedometrics, which focuses on the application of mathematical and statistical methods for the study …
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Flood Risk Analysis on Terrains
<p>An important problem in terrain analysis is modeling how water flowsacross a terrain and creates floods by filling up depressions. This thesis examines a number of flood-risk related problems. One such problem is answering terrain-flood queries: given a terrain represented as a triangulated …
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The landscape pattern surrounding the Venda sacred site of Thathe Forest
… investigating links to landscape governance. A terrain analysis of the study area is conducted using the thematic layers of geology and soils, gradient, aspect, and hydrology. This analysis is contrasted with a land-cover classification of the study area, further linking results to land-use …
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A study of the relationship between the use of GIS and project success in selected construction organizations
… as related to the following two GIS functions: Terrain Modeling and Traffic Management. Some functions that were very close to the .05 level of significance included Estimating Project Costs, Terrain Analysis, 2D and 3D Visualization, and Route/Site Selection.</p> <p>Recommendations included the …
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A Comparison of GIS Approaches to Slope Instability Zonation in the Central Blue Ridge Mountains of Virginia
… Map Combination, Bivariate Statistical Analysis, and the Shallow Landsliding Stability (SHALSTAB) model. Historically, the qualitative nature of the first model has led to the use of more quantitative statistical models and more deterministic physically-based models such as SHALSTAB. …
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An air pollution model for complex terrain
… is presented for use in regions of complex terrain. It consists of two pre-processors and the air quality model. TERRAIN is the terrain analysis preprocessor. It accepts as input digitized terrain elevation data and analyses it in terms of the orientation and steepness of slopes. WIND is the …
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Investigating nitrate attenuation in an urban stream using stable isotope geochemistry and continuous monitoring
… groundwater discharge zones identified through terrain analysis and continuous temperature modeling. These methods were also used to identify and sample reaches along which hyporheic flow occurred, where nitrate biological processing is often concentrated. In addition, loggers were installed at …
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Hydrologic and topographic analyses of bog turtle (Glyptemys muhlenbergii) wetlands
… data, delineated habitat patches, and computed terrain-based variables from 28 bog turtle-inhabited wetlands spanning both their northern and southern ranges. Using a previous classification system of water level dynamics, we reconstructed a principal component analysis (PCA) to categorize …
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Spatial Studies to Support the Management of Long Distance Trails
… resolution digital elevation models to measure terrain steepness near trails and along trails or potential trail routes. This analysis supports trail planning and assessment efforts because these terrain metrics strongly influence physical trail sustainability and are useful to evaluate the …
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Wetland landscape dynamics and its socio-ecological implications
… The first part employed an object-based image analysis (OBIA) approach for image classification performed in ENVI software. This approach involves segmentation and grouping imagery into objects to preserve the spatial, spectral, and temporal scale. Two classification algorithms support vector …
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Enhancement of digital elevation models using tree-based ensemble machine learning algorithms
… for applications where precise and accurate terrain information is needed. This research proposes an explainable tree-based ensemble feature-level fusion framework for enhancing satellite DEMs using Cape Town, South Africa as a case study. The enhancement methodology combines elevation and …
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An improved geography of surface water abundance in lakes and reservoirs
… lake/reservoir using geo-statistics, GIS-based terrain analysis, and existing literature. To understand the change of the distribution and the abundance of global lakes during recent 15 years, attributes of each inventoried lake were updated on the recently-produced circa-2015 dataset (Sheng et …
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Vernal Pool Mapping and Geomorphology in the Appalachian Mountains of Pennsylvania
… and leaf-off aerial imagery interpretation. Four terrain rasters derived from a 1-meter DEM (modified wind modified wind exposure, terrain surface convexity, topographic position index, and a multiresolution index of valley bottom flatness) were used in the suitability model. An analysis of …
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Modelling water budget at a basin scale using JGrass-NewAge system
… and with new techniques. For all the analysis, two significantly different basins, in terms of size and hydrological processes, are considered as case studies. These are Posina river basin in northeast Italy (small size basin) and Upper Blue Nile basin(large size basin) are used as …
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Late Quaternary landscape evolution and environmental change in Charwell Basin, South Island, New Zealand
… an interdisciplinary, integrated and holistic analysis of late Quaternary landscape evolution and environmental change in Charwell Basin using terrain analysis, loess stratigraphy, soil chemistry and paleoecological data. The study contributes new understanding of New Zealand landscape and …