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The use of vegetation indices to study temporal variation in vegetation phenology
Beránková, Petra ; Štych, Přemysl (advisor) ; Hesslerová, Petra (referee)
1 ABSTRACT The work deals with the use of vegetation indices to study temporal variation in vegetation phenology. The first part was devoted to detailed analysis of domestic and foreign literature, which deals with the work processed in this field. The main research questions were if changed start, end and length of growing period during the analysis period. Other research theme was comparision with ground phenological data. Another objective of this work was search dependencies computed data phenological variables from vegetation indicies with phenological ground data. As a basic data set was used GIMMS set, which distributes the vegetation index NDVI. Other data sets were MERIS MTCI, data MODIS with vegetation indices NDVI, EVI a LAI. The results of analyzes of vegetation phenology show trends in most shifts at the beginning of growing season, where was a shift to an earlier time. Results of the analysis of vegetation remote sensing data with ground-based phenological data ČHMÚ were unfolding always according to the specific forest phenological stations. Interesting results were at the phenological station Svoboda nad Úpou, where the results of trends directives were consistent in almost all data sets. Comparison of process curves vegetation indicies with ground data corresponded most curves at selected...
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Landscape functioning assessment using Landsat multispectral remote sensing data
Hesslerová, Petra
The main aim of the dissertation thesis was to develop method, based on the use of multispectral satellite data and the theory of dissipation, allowing the analysis of landscape functioning. The theoretical basis is Prigogine's theory of dissipation and self-organization of structures in which energy dissipation is seen as the transformation of solar energy to other forms of energy. In this process the essential role play water availability and vegetation, which is able to bind solar radiation into biomass (through photosynthesis) and by transpiration convert it effectively into latent heat. Maximum dissipation of the daily pulse of energy is considered as a major ecological function of the landscape; land cover temperature and its changes over time are indicators that determine the balance between the flow of water, energy and mass balance. The model area of northwest Bohemia and Saxony present various types of landscape - from relatively natural landscapes to that one, with an extremely high anthropogenic load. Landsat satellite images from the years 1986, 1995 and 2004 come from different periods of the season, so it was possible to analyze not only time changes, but also the behavior of vegetation in different phenological phases. Land cover, relative surface temperature, gained from Landsat...
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The use of vegetation indices to study temporal variation in vegetation phenology
Beránková, Petra ; Štych, Přemysl (advisor) ; Hesslerová, Petra (referee)
1 ABSTRACT The work deals with the use of vegetation indices to study temporal variation in vegetation phenology. The first part was devoted to detailed analysis of domestic and foreign literature, which deals with the work processed in this field. The main research questions were if changed start, end and length of growing period during the analysis period. Other research theme was comparision with ground phenological data. Another objective of this work was search dependencies computed data phenological variables from vegetation indicies with phenological ground data. As a basic data set was used GIMMS set, which distributes the vegetation index NDVI. Other data sets were MERIS MTCI, data MODIS with vegetation indices NDVI, EVI a LAI. The results of analyzes of vegetation phenology show trends in most shifts at the beginning of growing season, where was a shift to an earlier time. Results of the analysis of vegetation remote sensing data with ground-based phenological data ČHMÚ were unfolding always according to the specific forest phenological stations. Interesting results were at the phenological station Svoboda nad Úpou, where the results of trends directives were consistent in almost all data sets. Comparison of process curves vegetation indicies with ground data corresponded most curves at selected...
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Landscape functioning assessment using Landsat multispectral remote sensing data
Hesslerová, Petra
The main aim of the dissertation thesis was to develop method, based on the use of multispectral satellite data and the theory of dissipation, allowing the analysis of landscape functioning. The theoretical basis is Prigogine's theory of dissipation and self-organization of structures in which energy dissipation is seen as the transformation of solar energy to other forms of energy. In this process the essential role play water availability and vegetation, which is able to bind solar radiation into biomass (through photosynthesis) and by transpiration convert it effectively into latent heat. Maximum dissipation of the daily pulse of energy is considered as a major ecological function of the landscape; land cover temperature and its changes over time are indicators that determine the balance between the flow of water, energy and mass balance. The model area of northwest Bohemia and Saxony present various types of landscape - from relatively natural landscapes to that one, with an extremely high anthropogenic load. Landsat satellite images from the years 1986, 1995 and 2004 come from different periods of the season, so it was possible to analyze not only time changes, but also the behavior of vegetation in different phenological phases. Land cover, relative surface temperature, gained from Landsat...
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