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Геоморфология

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№ 4 (2007)

Общетеоретические статьи

3-8 187
Аннотация
Geomorphologic system is a complex of elements and forms of relief, inseparably connected by flows of matter and energy - morphologically, morpholithologically and genetically. An aggregate of these connections provides stable functioning and development of geomorphic system, its structural unity, orderliness, or arrangement, in space and time. Authors distinguish three hierarchical levels (of conformation or integration - aggregation): global (conglomeration), regional (aggregation), and local (integrity). The distinct laws of relief formation and evolution act on each level (illustrated by Goby relief). The nomenclative geomorphology hierarchy and its scheme are considered.
9-16 160
Аннотация
The description is given of morphological structure and the main features of relief formation in monsoon low-and middle-mountains of East and South Asia, as well as similar objects in other regions of Earth. Monsoon mountains are the mountains of climatic type, being transient from equatorial to arid ones.

Геоморфология и народное хозяйство

17-24 216
Аннотация
The supply of large volume of soft technogenic material into coastal zone leads to intensification of alongshore sediment transport and to its accumulation. In result the coastal cliff stabilizes, and valuable sites of coastal zone persist safe from abrasion.
25-32 222
Аннотация
The paper presents the fieldwork measurements data and assessment of gullies' development hazard along the gas pipeline on one of the steppe site of Orenburg district. An approach to evaluation of gully growth duration is described. The most hazardous erosion forms and effective erosion control measures were determined.

Методика научных исследований

33-41 290
Аннотация
The DEM of Priol'khon'e region was obtained by scan and vectorization of topographic maps, using ARCView and OpenEV GIS. The structural and genetic analysis of relief and of relic landforms was fulfilled.

Научные сообщения

42-52 202
Аннотация
The edge Vetreny Poyas in the south-east margin of the Baltic Shield corresponds mainly to the drop-shaped in plan massive of proterozoic volcanic and sedimentary rocks. The comparison of geologic and geomorphologic structure leads to the supposition of lateral neotectonic movements of massive alongside with the vertical ones. The mega-bend of archean rocks, having character of neotectonic activation, pushes the massive from the left side. In front of the massive there are the depression, which possibly marks the wedging crack; on the north of the massive there are indicators of left strike-slip. The valley of Onega River crossing the edge shows the signs of its uplift.
53-62 187
Аннотация
The paper discusses the problems of a large river morphodynamics in the course of artificial channel straightening and after that, the Lower Vychegda taken as an example. There are dune bedforms (riffles) of various size and morphology in its channel. During the period of intensive dredging many riffles were completely destroyed, others became morphologically simpler and the dynamics of their periodic reformations became simpler too. Since 1991 artificial dredging almost ceased. Some of the riffles have returned to the natural state while others have kept the human induces mode of channel deformation and relatively larger depths. At downstream ends of straight channel sections the new very shallow riffles were formed, being of maximum for the Vychegda wavelength and not eroded during the low water level period. These riffles did not exist under natural conditions prior to dredging. They formed due to irreversible anthropogenic changes of channel deformation regime on upstream riffles.
62-69 198
Аннотация
Gullies and balkas on the territory of Bryansk are growing nowadays. Some factors advances their growth: coursing the streets along slopes, using the linear erosion forms as dumping sites or spillways, building of garages alongside the gullies etc. The calculations based on hydrologic and geomorphologic characteristics of gully-balka network of Bryansk territory helped determining the boundary of natural monument "Upper and Lower Sudki (Balkas of Bryansk)".
69-78 218
Аннотация
Morphology and genesis of gully systems in the region under consideration (the central part of Minusinskaya depression) were analyzed. Quantitative characters of natural factors of gully erosion were obtained for the region; field researches were fulfilled on test sites along with analysis of cartographic and aerospace materials. The calculation model of potential growth of gulley size was adjusted and applied for the territory, rates of gullies growth being calculated for the steppe and forest-steppe landscapes. The map of gulley system potential development was compiled.
79-95 260
Аннотация
The analysis of special-temporal distribution of eolian sands surrounding highlands with humid climate reveals a connection between active deflation-accumulation processes and the level of receiving basins - seas and lakes. Accumulation of eolian sands in the sea coastal zone in the Far East corresponds to Early and Late Wurm regressions and even to small regression in Holocene. The conditions most favorable for eolian processes took place during regressions in the mouths of large rivers with the vast areas of sandy ground without mantle of submersed plants. Such conditions existed in Late Pleistocene and Holocene in different climates but in similar situations - regression of basins.
96-103 214
Аннотация
Incidental to Okinskoye tableland is stepped relief at heights comparable to neighbor ridges and massifs. Pleistocene glaciations plaid important role in its formation; radio-thermo-luminescence dating of their moraines (Middle Pleistocene) were obtained for the first time. In Holocene, the large fracture effusion of basaltic lavas took place at the upper reach of the Zhom-Bolok River, having formed the flow of 70 km long.

Рецензии

105-106 176
Аннотация
В издательстве МГУ вышла книга А.А. Свиточа и Т.С. Клювиткиной “Бэровские бугры Нижнего Поволжья”.

Хроника



ISSN 0435-4281 (Print)