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Mapping of the Litavka catchment using GPS
Hojcsková, Daniela ; Matějíček, Luboš (advisor) ; Brůna, Josef (referee)
This thesis is aimed on the study of Global Positioning System (GPS) and its utilization possibilities in nature sciences such as ecology, hydrology, botany and the others. The main contribution of this work is the investigation of current possibilities of the most accurate data collection by using GPS and their subsequent processing in GIS with focus on small catchment. Other methods of terrain data collection are described and compared with GPS in this work, as well. Practical part of the thesis focuses on characteristics of the locality, technical equipment and data editing gained in terrain. The study locality is the Litavka catchment, which is situated in Brdy. The geographical ground data, were gained from ZABAGED and were completed with results of own measuring in terrain. The output of the thesis is the digital terrain model of upper stream of the Litavka River modified by interpolation. Key words: GPS, DTM, GIS, mapping, catchment, Litavka, interpolation
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Historical development of spontaneous vegetation in post mining landscape near Sokolov
Vávrová, Alena ; Frouz, Jan (advisor) ; Brůna, Josef (referee)
Absract This study aims to assess the development of spontaneous succession on non reclaimed land on the example of Velká podkrušnohorská výsypka. Work was based on aerial photographs of dumps from the past 20 years, which were purchased from the Military Geographical and Hydrometeorology Office in Dobruška. Photos from various years were scanned, rectified and then elaborated in a GIS program. On the slides were set non reclaimed spoil area, which will be studied on the development of spontaneous vegetation. Results show considerable diversity in the speed at ingrowth areas different years in different places of dump. Can be estimated that in 20 years could spontaneously close up 30-70% space of dump, if was all left to spontaneous dvelopment. Keywords: succession, reclamation, GIS, coal mining, postmining landscape
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Modelling of land cover change in abandoned landscape using time series of aerial photography
Brůna, Josef ; Vojta, Jaroslav (advisor) ; Jačková, Kateřina (referee)
Obsah 5 English abstract This thesis deals with modelling of land cover change in abandoned landscape. The study site is located in the military area Hradiště, around the former village Tocov, it is 2,5 km long and 2 km wide. Due to lack of historical vegetation data on landscape scale, historical aerial photographs were used as a primary source of data. They were orthorectified, mosaicked and automatically object oriented then classified in two categories woodland and grassland. Changes between two successive classified images were modelled with generalized linear models with mixed effects (lmer). Variables that were derived from digital elevation model, former land use and spatial variables computed with algorithms based on cellular automata were used. In order to verify the model predictions with the actual situation and for easier interpretation and visualization of results, a new application PEMZOK (Spatially explicit model of overgrowth of abandoned landscape) was developed and is one of the results of this work. Rapid rate of overgrowth of remaining grasslands was found. The largest observed effect on the spread of trees had the distance to the nearest tree or shrub and density of trees in the vicinity (15 m × 15 m) and the wider neighbourhood (105 m × 105 m). Models with these variables and land use...
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Mapping of biomass flows in a selected region using GIS
Stráník, Vojtěch ; Matějíček, Luboš (advisor) ; Brůna, Josef (referee)
This literal review provides a summary of available instruments used for plannig waste collection comming from urban green mainintence. At first it describes methods of remote sensing suitable for mapping urban green areas, then various technologies applied for estimation of biomass production at this places. Solutions of waste collection comes from several papers, that tried to solve this problem using geographic information system (GIS). The following chapter evaluates different features of this waste in purpose of its next use. The last part compares theoretical knowledge, with how it works in real life. Key words: urban green, remote sensing, geographic information system, waste collection
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Use of remote sensing data for monitoring of long-term vegetation dynamics on the landscape scale
Brůna, Josef ; Wild, Jan (advisor) ; Romportl, Dušan (referee) ; Kropáček, Jan (referee)
This thesis deals with the use of remote sensing data for studying and monitoring vegetation changes. Thanks to archival materials, we can now make extensive studies at the landscape and global level without the need for large-scale old field data. From the Middle Ages, we can rely on different types of maps, for vegetation studies, these are mainly forestry maps. Since the 1930's, aerial photographs have been available in Europe, and satellite imagery was available since the 1970's. Availability and quality of satellite imagery had increased rapidly during my study. The most recent data source are unmanned aerial systems and methods of processing their data, which allow inexpensive detailed mapping of large areas. The presented publications do not only solve ecological research questions, but also contribute to solving current environmental problems in the Czech Republic, from nature conservation in National Parks and protected areas to monitoring of plant invasions. I have used archival forest maps for the reconstruction and analysis of large disturbances (windthrow and subsequent gradations of bark beetle) in forests of Šumava and the Bavarian Forest in 1868-1870. Species composition, as well as environmental factors derived from digital elevation model, were analyzed. The same topic was also...
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Use of remote sensing data for monitoring of long-term vegetation dynamics on the landscape scale
Brůna, Josef
This thesis deals with the use of remote sensing data for studying and monitoring vegetation changes. Thanks to archival materials, we can now make extensive studies at the landscape and global level without the need for large-scale old field data. From the Middle Ages, we can rely on different types of maps, for vegetation studies, these are mainly forestry maps. Since the 1930's, aerial photographs have been available in Europe, and satellite imagery was available since the 1970's. Availability and quality of satellite imagery had increased rapidly during my study. The most recent data source are unmanned aerial systems and methods of processing their data, which allow inexpensive detailed mapping of large areas. The presented publications do not only solve ecological research questions, but also contribute to solving current environmental problems in the Czech Republic, from nature conservation in National Parks and protected areas to monitoring of plant invasions. I have used archival forest maps for the reconstruction and analysis of large disturbances (windthrow and subsequent gradations of bark beetle) in forests of Šumava and the Bavarian Forest in 1868-1870. Species composition, as well as environmental factors derived from digital elevation model, were analyzed. The same topic was also...
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