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Application for Tree Stability Measurement
Šoltés, Jakub ; Kolář, Martin (referee) ; Polok, Lukáš (advisor)
This thesis is concerned with the subject of tree stability under a wind load. It defines, what the tree stability is, which techniques are used for its measurement and why it is important to determine it. It describes development process of application, that examines tree stability. Furthermore it analyses available the development tools, discusses a design and an implementation of the application written in C# language. Application has been created using .NET Framework along with graphical subsystem Windows Presentation Foundation following the design pattern Model View ViewModel. The result of this thesis is a desktop application aimed on Windows operating system. It can compute stability coefficient of the tree using information about trees‘ geometry and its environment. The value of stability coefficient is commonly used for tree safety inspection.
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Výpočet stromových charakteristik v bukovém porostu na základě fotogrammetrického mračna bodů
Ferdus, Michal
This bachelor thesis will focus on determining tree characteristics, which are diameter at breast height (DBH) and tree height using two different methods. The first method is conducted by ground measurement of the instruments currently used. The second method is done by using a combination of ground and aerial photogrammetry using an unmanned aerial vehicle (UAV). Thanks to the subsequent software analysis, DBH and tree position were determined by terrain's photogrammetry, and the aerial photogrammetry generated the height of the individual trees. After colleting all results, these methods were compared for accuracy, time consumption and any potential future use in forestry.
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Documentation of trees and shrubs of public garden "Hvezda" (Prague, Czech Republic)
Beranová, Zuzana ; Skalický, Milan (advisor) ; Martinková, Jaroslava (referee)
This bachelors thesis is focused on a brief characterization of Obora Hvězda (Star Game Reserve) and determination of tree species and measuring basic dendrometric values.
The first part is a literature research summarizing knowledge about Obora Hvězda, especially history and biology. History of Obora Hvězda is described since its origin in the 16th century. Emphasis is placed on the Star Summer Palace, which is a part of it. The study also discusses the fauna and flora of the area and, finally, evaluating the state of health of selected trees. The thesis is complemented by photographs and maps.
The second part focuses on the actual determination and measuring dendrometric values. In methodology there is described each step of measurement that had to be performed to determine all of the dendrometric values and also every tool that was used. The results include tables and graphs which are explained and commented upon in the discussion. The resume includes the evaluation of the overall condition of the trees in Obora Hvězda, especially the state of health and landscaping values.
The selected trees were first determined, then their coordinates were found by GPS Garmin Dakota 20 and marked on the map. Dendrometric values like tree girth and tree height were measured using 30m tape measure Cabrio Komelon and altimeter Nikon Laser 550A, crown width and height of deployment was also measured. During the research, the health state, physiological age and landscaping value of each tree was assessed. The photo documentation was done by the LG L90 device.
In the area of interest 50 trees, which can be classified into five plant families, were measured. The occurrence of Quercus petraea, Fagus sylvatica, Acer pseudoplatanus, Fraxinus excelsior, Betula pendula and Pinus nigra was confirmed. The most abundant is Quercus petraea, which is widely planted and covers the vast majority of Obora Hvězda. The fewest is of Fraxinus excelsior and Betula pendula. B. pendula should be gradually removed, since it is an aerochoric tree. The same can be said about non-native P. nigra, which was planted in the past and currently has a negative impact on the forest development. Most of the area of the natural monument occupy deciduous forests. Physiological age of most trees was marked by number 4, which stands for adult trees that are starting to show signs of growth stagnation. Adolescents (grade 3) were also present. Most of the trees were in good to excellent health condition. The results showed that in the area of interest there are not any trees in emergency or highly disturbed state. Most of the trees also show a high landscaping value, which means that in the area of interest we can find, with a few exceptions, trees of good quality. Occurrence of the valued species in Obora Hvězda was also confirmed by two previous studies, in 1986 and 2010.
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Efficient forest data collecting using modern measuring instruments
Formánek, Nikola ; Urbánek, Vilém (advisor) ; Kašpar, Jan (referee)
The subject of the thesis is to focus on breast-height diameter thickness and height of trees in area of Tři Skalky, Vůznice a Červený kříž for the purpose of forest environment monitoring in the protected landscape area and biosphere area Křivoklátsko. Furthermore to analyze new modern devices and evaluate their precision, speed and subsequent use for the purpose of observing similar research areas and to compare two methods of detecting breast-height diameter thickness (caliper, perimeter zone). During taking dendrometric variables were used digital calipers Mantax Digitech II, Digitech Professional II, Mantax digitech and Vertex Laser altimeter. Digital caliper DP II offers the possibility of its use with a variety of accessories and it was tested in conjunction with a GPS device to locate the researched areas on the map. All tested devices proved to be valuable tools for efficient data collection. For long term monitoring of chosen areas is recommended most advanced digital caliper Digitech Professional II. Comparison of acquired data taken with digital caliper and a digital peripheral zone showed that the resulting values are very similar and in compliance with all principles of measurement. Both of these methods are useable for monitoring radial increment.
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Application for Tree Stability Measurement
Šoltés, Jakub ; Kolář, Martin (referee) ; Polok, Lukáš (advisor)
This thesis is concerned with the subject of tree stability under a wind load. It defines, what the tree stability is, which techniques are used for its measurement and why it is important to determine it. It describes development process of application, that examines tree stability. Furthermore it analyses available the development tools, discusses a design and an implementation of the application written in C# language. Application has been created using .NET Framework along with graphical subsystem Windows Presentation Foundation following the design pattern Model View ViewModel. The result of this thesis is a desktop application aimed on Windows operating system. It can compute stability coefficient of the tree using information about trees‘ geometry and its environment. The value of stability coefficient is commonly used for tree safety inspection.
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Monitoring dynamiky vývoje v přirozených lesích ponechaných samovolnému vývoji‚ zpracování metodiky výběru území se společenstvy určenými k ponechání působení převážně přírodních sil‚ návrh metod a postupů péče o tato území
Správa ochrany přírody, Praha ; Agentura ochrany přírody a krajiny ČR, Praha ; Tesař, Vladimír ; Vrška, Tomáš ; Adam, Dušan ; Janík, David ; Hort, Libor
Základním cílem projektu je provést opakovaná podrobná šetření dendrometrická, fytocenologická, pedologická a strukturní v síti přirozených lesů v ČR ponechaných samovolnému vývoji. Na základě těchto šetření pak provést podrobné analýzy změn ve dřevinném i bylinném patře těchto lesů, v půdních poměrech i ve struktuře a textuře porostu. Mimo síť přirozených lesů s podrobným výzkumem dynamiky vývoje založit monitorovací síť v lesích ponechávaných samovolnému vývoji vycházející z jednotné metodiky sběru a zpracování dat. Cílem monitoringu je získat základní údaje pro charakteristiky lesních ekosystémů, které budou sloužit k zachycení vývojových změn v časové řadě. Zároveň je cílem projektu komplexní uchopení a vysvětlení teorie obnovního managementu lesních ekosystémů a její definování pro podmínky ČR.
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