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 22 for “"vegetation model"”.
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Competition among simulated plant species in a toy local vegetation model
… Kleidon and Mooney’s study by simplifying their modelling approach in a local mid-latitude temperate environment but including explicit competition for water. We hypothesized that competition would reduce potential biodiversity. We first explored the viability of 1000 randomly assigned strategies …
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Optimizing the Distributed Hydrology Soil Vegetation Model for Uncertainty Assessment with Serial, Multicore and Distributed Accelerations
… <p>The Distributed Hydrology Soil Vegetation Model(also referenced to as DHSVM) is a scientific mathematical model to numerically represent watersheds. Hydrology, as with all fields, continues to produce large amounts of data from researchers. As the stores of data increase the …
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Modeling the Cumulative Effects of Forest Fire on Watershed Hydrology: A Post-fire Application of the Distributed Hydrology-Soil-Vegetation Model (DHSVM)
The Distributed Hydrology-Soil-Vegetation Model (DHSVM) was applied to the Eightmile Creek watershed in western Montana. The purpose of this research was primarily to assess the applicability of the model as a cumulative effects assessment tool in the post-fire landscape of a forested watershed in …
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Modeling the Cumulative Effects of Forest Fire on Watershed Hydrology: A Post-fire Application of the Distributed Hydrology-Soil-Vegetation Model (DHSVM)
The Distributed Hydrology-Soil-Vegetation Model (DHSVM) was applied to the Eightmile Creek watershed in western Montana. The purpose of this research was primarily to assess the applicability of the model as a cumulative effects assessment tool in the post-fire landscape of a forested watershed in …
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Spatial and temporal dynamics of the terrestrial carbon cycle : assimilation of two decades of optical satellite data into a process-based global vegetation model
… combination of the process-based dynamic global vegetation model LPJ and a 21-year time series of global AVHRR-fPAR data (fPAR – fraction of photosynthetically active radiation). Assimilation of the satellite data into the model allows improved simulations of carbon fluxes on global as well as on …
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Utilization of the Distributed-Hydrology-Soil-Vegetation-Model (DHSVM) To Quantify Streamflow Changes and Slope Failure Probability Following the Snow-Talon Fire Near Lincoln Montana, USA
<p>Models are commonly used to attempt to simulate complex interactions on the landscape. Many factors such as vegetation, soils, topography, weather and disturbances can influence the hydrology of a watershed. Understanding what is influencing changes in streamflow following fire can be difficult …
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Utilization of the Distributed-Hydrology-Soil-Vegetation-Model (DHSVM) To Quantify Streamflow Changes and Slope Failure Probability Following the Snow-Talon Fire Near Lincoln Montana, USA
<p>Models are commonly used to attempt to simulate complex interactions on the landscape. Many factors such as vegetation, soils, topography, weather and disturbances can influence the hydrology of a watershed. Understanding what is influencing changes in streamflow following fire can be difficult …
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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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Coupling of Integrated Biosphere Simulator to Regional Climate Model version 3
… Biosphere Simulator (IBIS) to Regional Climate Model version 3 (RegCM3), and an assessment of the coupled model (RegCM3-IBIS). RegCM3 is a 3-dimensional, primitive equation limited area model used throughout the world for seasonal predictability and regional climate studies. IBIS is a dynamic …
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An integrated modelling approach for sustainable management of semi-arid and arid rangelands
… management. In this thesis I combined a range of modeling approaches that integrate different disciplines and spatial scales in order to contribute to basic guidelines for sustainable management of semi-arid and arid range-lands. Since water availability and livestock management are seen as most …
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Optimality and resilience in patterns of carbon allocation and growth in vegetation under acclimation response to climate change
… a multi-layer canopy, soil, and root system vegetation model to capture the effects of plant acclimation. This vegetation model is coupled with a teleonomic carbon allocation and growth model that we develop in this study to specifically capture the acclimation of carbon allocation. Our …
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Vegetation patterns and plant reproductive processes in the succulent Karoo
This thesis focuses on vegetation patterns and plant reproductive processes at the Tierberg Karoo Research Centre (33°1 0'S, 22°17'E) in the semi-arid southern Succulent Karoo, South Africa. It begins with an investigation into the roles of soil properties and competition in explaining variation in …
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Ecohydrology of a seasonal cloud forest in Dhofar
… by performing a field experiment and a modeling study. Based on the results of the field experiment, the ecosystem in Dhofar is classified, for the first time, as a seasonal deciduous cloud forest. Owing to the seasonal cloud cover, the soil storage in this ecosystem is filled and …
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Modeling land surface processes of the midwestern United States : predicting soil moisture under a warmer climate
… To assess this response, a dynamic global vegetation model, Integrated Biosphere Simulator, was coupled to Regional Climate Model version 3 (RegCM3- IBIS). IBIS has several key advantages over the native surface physics scheme used in RegCM3, Biosphere-Atmosphere Transfer Scheme 1e …
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An Evaluation of Life History Parameters of White-Tailed Deer (Odocoileus virginianus) in North Dakota
… test a previously published grassland bed site model for the Northern Great Plains that stated the probability of neonate bed site selection increased with increase of vertical height of vegetation; model validation resulted in an accuracy of 68.3%. Management for vertical height of grasslands …
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Influence of climate, fire and phosphorus in the dynamics of vegetation in the Amazon-Cerrado border simulated with INLAND model
… the main factors responsible for the dynamics of vegetation in the Amazon such as climate and / or deforestation suggest the possibility of the Amazon rainforest may not resist a potencial change in rainfall patterns, and be converted to an ecosystem of more sparse vegetation like savanna, which …
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Process-based simulation of the terrestrial biosphere : an evaluation of present-day and future terrestrial carbon balance estimates and their uncertainty
… for long-term climate mitigation strategies. A model describing the relevant processes that govern the terrestrial carbon cycle is a necessary tool to project regional carbon budgets into the future. This study (1) provides an extensive evaluation of the parameter-based uncertainty in model …
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Simulating organization of convective cloud fields and interactions with the surface
… we describe the coupling of a physiology-based vegetation model (HYBRID) and of a sea surface flux algorithm (COARE) to the cloud-resolving Active Tracer High-resolution Atmospheric Model (ATHAM). We investigate the full diurnal cycle of convection based on the example of the Hector storm over …
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The impact of land-use and global change on water-related agro-ecosystem services in the midwest US
… of land use change for bioenergy production a vegetation model (Agro-IBIS) capable of simulating the growth, function and ecosystem uptake of water and carbon and leaching of Dissolved Inorganic Nitrogren (DIN) was coupled with a hydrology model (THMB) that simulated streamflow and DIN export. …
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Análisis de la distribución espacial de biomasa aérea para el bosque nativo entre las regiones del Maule y Los Lagos
… de Ecosistemas Globales (GEDI); como de un modelo de dinámica vegetacional 3) ForClim v 4.0.1. Por una parte, el Inventario Forestal Nacional reportó valores de biomasa significativamente inferiores (p < 0,05) respecto a los inventarios reportados por la literatura científica y algunos no …
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