Prace Geograficzne, z. 104

Redaktor: Krzemień K.
Rok wydania: 1999
Język publikacji: angielski

ISSN 1644-3586

Cena egzemplarza: 12.60 PLN (w tym 5% VAT)

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Foreword
Autor: Kazimierz Krzemień
Strony: 7-8
River channel mapping instruction. Key to the river bed description
Autorzy: Maria Kamykowska, Ludwik Kaszowski, Kazimierz Krzemień
Strony: 9-26
Summary - read more..
The authors propose a method for characterising channel systems during fieldwork. Depending on the degree of detail of a research project, some or all of the proposals included in the form may be used. This method has been field-tested in various areas of Poland, the Alps, the Massif Central in France and in Scotland.
Classification systems of mountain river channels
Autorzy: Ludwik Kaszowski, Kazimierz Krzemień
Strony: 27-40
Summary - read more..
The authors have compared several river channel classification systems and typology methods, and constructed a diagram comparing river channel classifications.
Structure and dynamics of the high-mountain channel of river plima in The Ortler-Cevedale massif (south Tirol)
Autor: Kazimierz Krzemień
Strony: 41-56
Summary - read more..
The paper characterises the structure of a proglacial mountain channel system in the Italian Alps. The geomorphologic effects of catastrophic floods and channel management have been presented, based on research conducted between 1987 and 1995.
Channel typology for the river Feshie in the Cairngorm Mts, Scotland
Autorzy: Wojciech Chełmicki, Kazimierz Krzemień
Strony: 57-68
Summary - read more..
The channel of the River Feshie was examined in order to identify and delimit the channel sections of different type, and explain the reasons for its high complexity developed in spite of almost uniform bedrock geology. The numerical taxonomy methods were applied. These were: the furthest neighbour, the median, the centroid, the mean and finally the nearest neighbour methods. Fourteen attributes of the channel and the transported material were taken into account. The taxonomy procedures were supplied with complementary, however subjective method based on the number of limits showing rapid change in characteristics describing succesive reaches of the river. The procedures resulted in four channel types identified. Their character and sequence result from the late-glacial and post-glacial history of the area, this is: the glacial erosion followed by the capture of todays upper part of the River Feshie, formation of glacial and fluvioglacial deposits being now the source of the bedload material, and finally the flushy hydrological regime of the river.
Morphodynamic structure of a river channel in a late-glacial relief area (Case of the Łeba River, Pomorze Region in the North-Western Poland)
Autor: Marek Angiel
Strony: 69-107
Summary - read more..
The research aimed at understanding the morphology and functioning of a late-glacial river channel. A morphogenetically complex valley of the river Łeba was chosen as representative for the late-glacial northern slopes of the Polish Baltic coast (a region called Pomorze). The channel structure analysis method was employed with morphodynamics as the basic criterion. Conclusions as to which fluvial processes were dominant in a given channel reach were based on the channel shape and its features, following a detailed analysis of the channel morphometry and features, as well as the valley floor lithology. In late-glacial relief areas, the primary factors determining the natural course of a particular river channel system development are local geology and geomorphology, and particularly the origin, solid geology and morphology of the land features in which the river channel is formed. Late-glacial river channels are structurally complex. The morphodynamic structure of the Łeba river closely follows the valley structure and each of the channel reaches is modelled by a set of fluvial processes typical for any given valley form. Fluvial processes which shape particular reaches are driven by the valley morphology (long profile gradients and the valley width), and the type of rocks in the valley floor. Another important factor for the dynamic structure of the late-glacial area river is the existence of lakes along its course, which constitute local base lines of erosion which receive all the material carried by the river.
River channel structure in a late glaciation area. An example of the upper Szeszupa river (Suwałki Lakeland, northeastern Poland)
Autor: Ewa Smolska
Strony: 109-124
Summary - read more..
The valley and the channel of the Szeszupa river are characterised following a field research. The origins of the valley are identified. The channel type is defined on the basis of lithological and structural features. They are conditioned by the location in the genetic type of the valley.
Typology of river channel processes and the regional differentiation of river channels in Russia and neighbouring countries
Autor: Roman S. Chalov
Strony: 125-140
Summary - read more..
The typology of river channel processes is based on an analysis of those processes, defined as a combination of phenomena inherent in the interaction of flows and river beds; erosion, transportation and accumulation. It is shown that the river channel process types correspond to the distinguished river channels of mountain, semi-mountain, and flatland type of rivers. The morphodynamic classification also includes the geomorphologic channel types (broad floodplain, incised, and adapted), types of large river channel forms, morphodynamic types of river channels themselves, the hierarchy of river channel forms and the types of relief, which shapes the corresponding classification blocks. Consideration is given to the peculiarities in the distribution of rivers with different types of river channel processes, and the geomorphologic and morphodynamic types of river channels in Russia and neighbouring countries. Connections are shown between these peculiarities and the free and restricted conditions of river channel deformation development, river channel-forming discharges, etc.