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Effects of orography on spatial distribution of heavy precipitation in the north-east of the Czech Republic
Průchová, Kateřina ; Müller, Miloslav (advisor) ; Šercl, Petr (referee)
The dissertation deals with the influence of orography on the spatial distribution of heavy precipitation in the territory of the northeast Moravia and Silesia. The area was chosen because of the specific distribution of daily precipitation for heavy rainfall events in the past and also in May 2010. Cases of heavy rainfall for the period 1961 - 1995 are balanced with morphometric characteristics in the place and in the surrounding the station, defineted in face of direction air flow. For the calculation of the direction air flow are used data from 850 hPa level from reanalysis ERA-40, topographic characteristics are calculated by ArcGIS and they are correlated with the rain gauge data from stations ČHMÚ. The results show us that only the altitude does not have effect on the spatial distribution of precipitation, but it should be think over more topographic parameters. During the north and partially during the west air flow, where the precipitation are mostly from the stratiform clouds, appears a stronger orography influence on the measurement and on the spatial distribution, if we consider the morphometric characteristics behind the station in the direction of air flow. The case of south and east air flow showed us a weaker orography effect, which can be perhaps explained by a higher part of...
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Spatial distribution and morphometric features of blockfields in southern part of the Brdy Mts.
Hotový, Jan ; Křížek, Marek (advisor) ; Dlabáčková, Tereza (referee)
This paper deals with a topic of blockfields in southern part of the Brdy Mountains. The aim of this work is to describe an origin of the block fields generally, characterise their spatial distribution, morphometric and structure features, including their specific thermal regime. Another task is to characterise and classify the block fields in the southern part of Brdy Mts and compare them with the similar accumulations described in literature. 30 block fields were identified in this area. Morphometric analysis based on digital elevation model revealed that block fields in the southern part of Brdy Mts are sized roughly from 200 to 5 500 m2 and occur mostly at 725 - 750 m a. s. l. on steep or very steep slopes with a prevailing southern- -west and west exposure. An additional exploration of a bedrock confirmed that block fields here consist of conglomerate and silicite rocks. The results provide information about paleoclimate of Brdy Mts and their surroundings. Key words: block fields, Brdy Mountains, frost weathering, morphometric characteristics
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Using ERT and GPR in polygonal patterned ground analysis
Široký, Jakub ; Křížek, Marek (advisor) ; Hartvich, Filip (referee)
Polygonal cryogenic structures cannot be investigated with conventional methods as they could be harmed during measurement. A real3D GPR and ERT non-destructive surveys were used to examine and prove applicability for topsoil covered ice-wedge pseudomorphs and coarse-grained sorted polygons (patterned ground). A list of processing tools and algorithm suitable for such environments was created and tested. The benefits of 3D measurements are illustrated on horizontal slices and pseudo3D visualisation of 3D Cube. Basic morphometry characteristics of both forms were collected. Abilities of geophysical imaging for advanced shape characterisations are discussed, too. The low-frequency measurements gave better results at both sites. Pseudomorphs, 2 wide and up to 6,5 long, were found penetrating depth bigger than 3,5 . Sorted polygons, 2,5 wide in diameter, were depicted locked by stony ring of width around 1 . Sorting depth extends up to 0,54 depth for sure, perhaps more.
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Effects of orography on spatial distribution of heavy precipitation in the north-east of the Czech Republic
Průchová, Kateřina ; Müller, Miloslav (advisor) ; Šercl, Petr (referee)
The dissertation deals with the influence of orography on the spatial distribution of heavy precipitation in the territory of the northeast Moravia and Silesia. The area was chosen because of the specific distribution of daily precipitation for heavy rainfall events in the past and also in May 2010. Cases of heavy rainfall for the period 1961 - 1995 are balanced with morphometric characteristics in the place and in the surrounding the station, defineted in face of direction air flow. For the calculation of the direction air flow are used data from 850 hPa level from reanalysis ERA-40, topographic characteristics are calculated by ArcGIS and they are correlated with the rain gauge data from stations ČHMÚ. The results show us that only the altitude does not have effect on the spatial distribution of precipitation, but it should be think over more topographic parameters. During the north and partially during the west air flow, where the precipitation are mostly from the stratiform clouds, appears a stronger orography influence on the measurement and on the spatial distribution, if we consider the morphometric characteristics behind the station in the direction of air flow. The case of south and east air flow showed us a weaker orography effect, which can be perhaps explained by a higher part of...
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Growth and individual variability of the water scorpion Nepa cinerea (Heteroptera: Nepomorpha: Nepidae)
VILIMOVSKÁ, Lenka
It this study morphometric characteristics and the growth of univoltine predatory water scorpion - Nepa cinerea were studied on the basis of data measured on freshly killed individuals, the same ethanol - fixed individuals and dried individuals. The growth of this species has an exponential character. By comparing the morphometric characteristics of freshly killed and fixed individuals was found that the ethanol fixation influenced mainly weight of all developmental stages and total abdominal ventral length of adults. The same was found for the comparison of morphometric characteristics of freshly killed individuals and dried individuals. Other studied dimensions were not significantly deformed even by fixation or drying. Reducing of individula demensions by the influence of fixation and drying was uneven at different developmental stages. Reliable dimension for differentiating of individual developmental stages fixed material and the collected dried material is especially the media length of the body. Dimensions of fixed individuals and dried individuals is not significantly different from dimensions of freshly killed individuals. This project was supported by grant GA CR P505/10/0096.
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