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Geografický časopis

Volume 61, 2009, No. 3


  Geografické polia a priestorová organizácia krajiny (pokus o vyjasňovanie základných konceptov)
Jozef Minár 1)

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1)Univerzita Komenského v Bratislave, Prírodovedecká fakulta, Katedra fyzickej geografie a geokológie, Mlynská dolina, 842 15 Bratislava.

geographical field, landscape structure, tensor calculus, geographical theory, geographical synthesis

A search for integrating aspects of various field concepts in geography is presented. A formal basis of the unification can be a tensor calculus. Functional types of geographical fields are defined on the basis of a dual concept of the landscape (matter and energy on the one side and values and information on the other) and a causal triad: initiation – process – state. Special attention is paid to definition and hierarchy of initiatory geographical fields. Possibility to derive them by using of cultural landscape structure is outlined. The problem of transformation of geographical fields into geographical objects and vice-versa is also outlined.

Geografický časopis. Volume 61, 2009, No. 3: 179-198.

  Analysis of lateral channel activity of the Sacramento River from aerial photos
Monika Michalková 1)

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1)Comenius University in Bratislava, Faculty of Natural Sciences, Department of Physical Geography and Geoecology, Mlynská dolina, 842 15 Bratislava, Slovak Republic.

lateral movement, active channel, floodplain, aerial photos, Sacramento River

The technique of photogrammetry permits the study of contemporary river channel changes if the river is large enough and characterized by active evolution of geomorphic pattern. Results presented in the study confirm the dynamic and continual change of the Sacramento River channel and floodplain. The results also showed the channel narrowing along the active channel and straightening of the channel. This specific evolution of the river channel may be generally attributed to local geological conditions, discharge, the occurrence of floods, sediment transport, resistance to erosion and type, presence and density of vegetation. All these causes, except geological conditions, can be influenced by human activities. Analysis of the data set, enhanced by a wide range of field measurements and observations, have demonstrated a successive diminishing of the active floodplain and also higher occurrence of the river cutoff lakes.

Geografický časopis. Volume 61, 2009, No. 3: 199-213.

  Bright patches in Chernozems areas and their relationship to the relief
Anna Smetanová 1)

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1)Comenius University in Bratislava, Faculty of Natural Sciences, Department of Physical Geography and Geoecology, Mlynská dolina, 842 15 Bratislava, Slovak Republic.

bright patches, erosion, DEM, relief analysis, Trnavská Hill Land

Bright patches are characteristic of loessic hill lands in the Danube Lowland. They represent areas with a shallow and bright humus horizon. Hitherto, mainly spatial distribution and possibilities of their mapping have been studied. The aim of this paper is to contribute to the knowledge of their geomorphic features, relationship to the relief and morphogenesis of arable areas. Using the tools of the GIS, bright patches were identified on the basis of aerial photographs and orthophotomaps. The DEM and the related DTMs were created. Relief characteristics were computed by means of raster statistics and a database was built. On the basis of these sources, features of the bright patches were described and the relationship to relief was analysed.

Geografický časopis. Volume 61, 2009, No. 3: 215-227.

  Klasifikace místních klimatických efektů
Miroslav Vysoudil 1)

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1)Univerzita Palackého, Přírodovědecká fakulta, Katedra geografie, třída 17. listopadu 12, 771 46 Olomouc, Česká republika.

topoclimate, local climatic effect (LCE), classification, natural hazard/risk, environmental consequences

The subject of the paper is topoclimate and particularly the existence and manifestations of local climatic effects (LCE). The author proposes their classification and indicates their presumed manifestations in landscape. As the local climatic effects are possible causes of natural hazards, their presumed environmental consequences are also described. The relatively long history of topoclimatic research along with the need for further investigations result in a very well prepared theory of its study in Central Europe including the Czech and Slovak Republics. Recent information available on the subject of topoclimate represents an indispensable basis for the experimental research, territorial planning and other social activities. It is therefore necessary to focus attention on acquisition and provision of the most realistic and precise information possible concerning the nature of topoclimate. It also means the capacity to identify and describe manifestations and consequences of LCE in cultural landscape.

Geografický časopis. Volume 61, 2009, No. 3: 229-241.

  Dynamika riečnych geosystémov v jaskynnom prostredí
Jozef Jakál 1)

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1)Geografický ústav SAV, Štefánikova 49, 814 73 Bratislava.

cave rivers, river geosystem, karst geomorphology, karst hydrology, research methodology, Slovakia

This is the introductory study to the issue of geomorphological geosystem in the cave environment and its dynamics. It deals with questions of the underground streams, their origins, formation of their channels and effects of the surface and underground karst phenomena on the formation of the underground river geosystems. It presents the basic methodology analysing not only the morphological phenomena, their morphometry, but also the hydrological regime of karstic water and its links to surface streams which drain the karstic territory. Model territories include the plateau autochthone karst with the cave of Domica (Slovenský kras) and the middle mountain dissected allogeneic karst with the Jaskyňa Slobody cave (the Nízke Tatry Mts.).

Geografický časopis. Volume 61, 2009, No. 3: 243-254.