Preview

Геоморфология

Расширенный поиск
№ 1 (2008)

Общетеоретические статьи

3-15 262
Аннотация
The disposal of the exhaust nuclear fuel and radiowastes into the ocean-bed under clastic deposits on the continental margin may serve as alternative to the established practice of land burial. The landslides are an important lithodynamic factor within this geomorphologic zone. The artificial landslides may form the clastic deposits flow to cover the storage containers previously located on the bottom. The choice of appropriate places in the ocean is practically indefinite.
16-24 245
Аннотация

The morphologic structure of alpinotype mountains is described. The nivation processes and foremost avalanches are the main factors of summit belt and slope belt formation. The role of glacial activity in the alpine morphogenesis is commonly exaggerated; the alpine landscapes continue their morphologic maturity and do not transfer into relics even after deglaciation.

Геоморфология и народное хозяйство

25-35 248
Аннотация
Retrospective analysis of channel alterations revealed durable tendencies of channel processes in the heavy branchy riverbed area known as "Yakut Robbery". The rates and volumes of channel deformations as well as the effect of seasonal freezing and perennial frozen upon these processes were estimated. Together with flow cinematic calculations for affluent phase of water regime it helped developing the prognostic assessment of channel processes and their impact on engineering facilities and navigation conditions.
36-42 239
Аннотация
The development of coastal geosystems of the Bratsk reservoir is determined by its water level conditions. The southern part of reservoir is characterized by wide occurrence of the soluble carbonate rocks, which is the cause of the typical karst forms development as well as associated deformations such as karst-landslides and large karst-ero-sion forms.

Научные сообщения

43-55 218
Аннотация
History of development of little buried erosion forms in the centre of Middle-Russian highland is reconstructed. The regularities of their erosion-accumulation dynamics are related to landscape-climatic changes during interglacial-glacial macrocycle. Four large stages of their development are distinguished: deepening and linear growth in the Late Moscow time, stabilization during the Mikulino Interglacial, rapid filling at the Mikulino - Early Valdai boundary, and slow filling during the most part of Valdai epoch.
56-64 308
Аннотация
The huge amount of polar meteorological stations data for the 1914-1960 period was analyzed. The rates of coast destruction were evaluated by measuring the changing distances from its escarp edge to various fixed objects. The intensity of all the geomorphic processes on the islands and on the coasts was determined mainly by the weather conditions of the given year. The period of warming of the Arctic in the years 1930-1940 was characterized by high activity of the processes. With the beginning of the temperature fall in the 1950s, the intensity of some processes reduced; its activation was usually connected with local causes. In the present time, when irregular warming takes place in Arctic, the rates of processes are the same as earlier. The main factor of space localization of the most intensive processes is the distribution of ice-contenting rocks and ice bodies in the loose sediments.
65-71 305
Аннотация
The upper level of filling the Chuisk basin with lacustrine waters reached 2250 m. The evidences were obtained by analysis of lake terraces, erratic blocks and lacustrine-glacial deposits. This level differs from 2100 to 2250 at different sites, depending on the slope steepness, exposure, and rock composition.
72-86 481
Аннотация
The critical analysis of opinions on Baer hills origin is given. The possible causes of hills formation are discussed and the hypothesis of their stadial-marine origin is put forward. According to this hypothesis, the Baer hills arose in several phases over short time gap during the Late Khvalyn transgression. Their origin is due to large washes and counter flows of river deltas on the shoals of the Caspian Sea.
87-94 297
Аннотация
The alluvium of the Lena River below the Pokrovsk town was particularly analyzed including pollen analysis. There exists the single terrace above flood-plain build up with Drias-Holocene deposits and high and low infill flood-plains; they were formed over the three main stages. During global cooling in the period 20-17 ma b. p. the base level of the Lena was low and deep erosion prevailed. During warm period 164.5 ma (Drias) the base level upraised and alluvium was accumulated in the valley. At the third stage up to nowadays the transit of earlier accumulated material is predominant. In the result, the channel section changes frequently as well as its carrying capacity, which leads to gorges formation and flooding of large areas.
95-108 299
Аннотация
On the basis of published geological-geomorphologic data and route observations author distinguished local in-termountain arid plains and piedmont plains in north-western Africa. These plains correspond to large morphostruc-tures of young Atlas Mountains - micro plates of Meseta of Morocco and High Plateau. The structure of Susa, Tizni-ta and Dra - the most representative arid plains, edging the High Atlas from the south, was studied. Their bed relief is complicated and unconformable to surface. The drainage network of plains relates to their hydrogeological structure. The surface of the plains has the natural-anthropogenic character, being under strong agricultural land development for more then 2000 years. The connection between the growing use of underground water resources and desertification of the plains is established.

Юбилеи

Потери науки



ISSN 0435-4281 (Print)