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 3246 for “"vegetation"”.
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River - Riparian Vegetation Interactions
… attention will be focused on plants. Riparian vegetation is of great interest because of its double role, passive and active. In the first role (i.e. the passive one) the biological activity is not considered and only the effect of vegetation morphological and mechanical characteristics on …
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Winter conditions of vegetation
Made available in DSpace on 2017-11-30T22:46:15Z (GMT). No. of bitstreams: 2 5956263.pdf: 1167439 bytes, checksum: 0847d9fb7c168b4a572d7c9e04dd670c (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1893
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Monte Carlo simulation model for electromagnetic scattering from vegetation and inversion of vegetation parameters
… scattering model for microwave remote sensing of vegetation canopy is developed on the basis of Monte Carlo simulations. An accurate model of vegetation structure is essential for the calculation of scattering from vegetations, especially those with closely spaced elements in clusters. The Monte …
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Flow through Rigid Vegetation Hydrodynamics
Better understanding of the role of vegetation in the transport of fluid and pollutants requires improved knowledge of the detailed flow structure within the vegetation. Instead of spatial averaging, this study uses discrete measurements at multiple locations within the canopy to develop velocity …
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Vegetation change and vegetation type stability in the Cape of Good Hope Nature Reserve 1966 - 2010
Vegetation stability was investigated within the Cape of Good Hope Nature Reserve by incorporating three vegetation surveys spanning a 44 year time period. The goals of this study were to investigate changes in overall species diversity within the reserve, stability of community composition within …
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Atmosphere-vegetation interactions over South Africa
… sensitivity of the atmospheric circulation to vegetation change over South Africa in the context of the portended global warming. This is achieved using a vegetation model driven by climate change information and subsequently incorporated within a general circulation model (GCM). The …
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Characterizing vegetation structure using waveform LiDAR
… structure that significantly influence light and vegetation interaction. Waveform airborne LiDAR data contains large amounts of vegetation structural information, and is the best tool available for providing detailed physical information for large areas of vegetation. In this thesis, we first …
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Vegetation gradients in Southern Cape mountains
… This study arose from the need to define local vegetation patterns and their interdependence with animal life, climate and soil as a necessary prerequisite to vegetation mapping and Fynbos is part of the diverse and complex Cape Floral Kingdom. Field taxonomy in fynbos is often problematic for …
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Aquatic gravity currents through emergent vegetation
… examined the hydrodynamic effects of aquatic vegetation on these currents. This study investigates the dynamics of lock-exchange flows, a particular class of density currents, propagating through rigid emergent vegetation. First, previous mathematical formulation is extended to develop …
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Vegetation management effects on fruit trees
The orchard floor is managed to provide satisfactory conditions for both the tree root system and farm machinery. The choice of a particular system to achieve this aim depends on a number of factors. The topography and climate of the orchard site are considered. The influence of the orchard floor …
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Vegetation survey of Namibia: conceptualisation and implementation of a nation-wide vegetation survey serving practical land management needs
The global human population is dependant on a variety of plant-based ecosystem services for its well-being, even for its very existence. The well-being, in fact, the very existence of man is dependant upon plant-based ecosystem services. Typical services derived from ecosystems encompass food …
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Dynamic vegetation Roughness in the riparian zone
Vegetation in the floodplain plays an important role in dictating the hydraulics of an open channel river system. While vegetation is beneficial to the biological productivity of the river system, it can also increase flood risk due to increased channel roughness. Traditional means of predicting …
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On the hydrodynamics of flexible vegetation canopies
Aquatic vegetation canopies, including seagrasses, provide a host of ecosystem services within coastal environments. The environmental, social, and economic benefits are primarily controlled by the detailed interactions between hydrodynamics and canopy properties, which governs energy cascades and …
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Vegetation Variability and Its Hydro-Climatologic Dependence
… is to investigate the multi-scale variability of vegetation, its dependence on hydrologic controls such as topography, soil properties, vegetation type, and climate variations (e.g., the El Nino Southern Oscillation [ENSO]), and to synthesize this understanding for future predictive modelling …
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The vegetation of the Cape Hangklip area
… 11 500 ha of coastal plain and mountain vegetation in the Cape Hangklip area of the South-Western Cape Province of South Africa was studied. The suitability of homogeneity functions and of the association-analysis techniques for the analysis of large areas of the distinctive coastal and …
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Demand prediction modeling for utility vegetation management
… proposes a demand prediction model for utility vegetation management (VM) organizations. The primary uses of the model is to aid in the technology adoption process of Light Detection and Ranging (LiDAR) inspections, and overall system planning efforts. Utility asset management ensures vegetation …
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Erosion control with vegetation in highway corridors
… in highway corridors disturb the natural vegetation and land contours, thereby causing erosion and pollution. Minimizing erosion is predicated on the principle of maximizing water infiltration to reduce massive runoff of water. This depends on grading and soil preparation methods, …
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Hydraulic Resistance due to Emergent Wetland Vegetation
Models to estimate hydraulic resistance due to vegetation in emergent wetlands are crucial to wetland design and management. Hydraulic models that consider vegetation rely on an accurate determination of a resistance parameter such as a friction factor or a bulk drag coefficient. At low Reynolds …
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