Расширенный поиск
№ 3 (2007)

Общетеоретические статьи

3-12 216
An actual approach to radiowastes and exhaust nuclear fuel disposal into the continental crust doesn't meet safety requirements. The earth crust is continuously moving and deforming and its main feature is the ubiquitous jointing: there are no absolutely impermeable blocks. Repositories are to be degraded by crustal movements, earthquakes, climatic changes, underground waters. The places of disposal should be seated at the lowest level of lithosphere and should be completely isolated from environment
13-21 204
Two landform sequences are described, risen from alluvial-erosion processes in subaerial and submarine conditions, each consisting of three links. The upper links are gullies and these of shelf zone consequently, the middle ones -valleys and canyons of continental slope, and the lowest - river deltas and debris cones at the foot of continental slope. Longitudinal profiles of each link in both continental and submarine conditions may be fitted by the similar curves: logistic one for the upper links, parabolic one for the middle links.


Экологическая и прикладная геоморфология

24-37 296
On the basis of new cartographic materials and field research the conventional opinion of hazardous endo- and exogenic processes on the Great Caucasus was reconsidered. Seismic activity on the North Caucasus is accepted to be higher than it was early considered. Elborus and Kazbek are attributed as potentially active volcanoes. The description is given of the catastrophes of the late decades and their aftermath: glacio-nival mudflows, destructive floods of 2000-2002 in Georgia, landslides, earth falls etc. An ecological disaster on the Caspian seashore is being developed now and this will continue in future. Irrational politics in the civil engineering and agricultural development aggravates the hazardous processes effects.
37-46 216
Aeolian processes are distributed in all natural zones of the Earth, but they are more typical for steppes, semi-deserts, and deserts. They have a great impact on human activity. Such objects and areas as 1) human settlements, 2) people living outside settlements, 3) agriculture, 4) transportation, 5) bridges, 6) electrical lines, 7) telephone and satellite communication are most of all subjected to Aeolian processes. Besides, Aeolian processes are essential environmentally since they have an impact on other natural components.
47-53 296
Since the second half of XX century, the territory of Georgia underwent strong human impact and now is on the verge of environmental crisis. The population increase and widening of economic activity have lead to the catastrophic landscape changes in some regions. The paper deals with concrete data on man-induced changes of land-forms and hazardous geomorphic processes in Georgia. The criteria of geodynamic stability have been worked out on the basis of morphologic and morphometric analysis and monitoring of the Great Caucasus slopes. The lithologic characteristic of relief is based on formational principle: it requires drawing out the main features of spatial distribution of rocks being the genetically homogeneous and having engineering geologically similar characteristics (hardness, stability, hydraulic permeability, soaking etc.). Authors suggest paying equal attention to engineering geologic properties of rocks and to energy of relief as integral indicator of its stability in the analysis of geomorphologically hazardous places of earth surface.

Научные сообщения

54-62 215
Lower Don is typical meandering river. Following anthropogenic impact riverbed morphology has not been changed greatly, but its longitudinal profile and channel-forming discharge have changed while riverbed persistence has increased. Directional erosion has been taking place at Lower Don since Cymlyanskoe reservoir construction.
70-74 215
Relief and quaternary deposition of the Pechora, Kama, and Vychegda rivers interfluve were described on the basis of geologic survey data. The boundary of Moscow glaciation is drawn further south than it was earlier accepted - along the strip of the end-moraine relief crossing the interfluve. The supposition is grounded, that the southern part of the lacustrine-glacial plain in the upper reach of the Pechora river was formed during the late stage of Moscow glaciation.
75-85 196
Area, ruggedness of boundaries and form of slopes were studied on the topographic map (1:100 000) of separate areas at the south slope of Great Caucasus. The geologic, geomorphologic and cartographic-statistic analysis of the sites was carried out. The classification of the slopes by area and form is given; the map of ruggedness of boundaries and the map of slope characteristics (1:100000) were compiled.
86-91 237
The Uzun-Ada (Krasnovodsk) earthquake is still the largest one within the middle stretch of the Alpine mobile belt, but the event is badly known till now. On the base on the archive data gathered for the first time and on the descriptions of eye-witnesses, the author examines seismodeformations in epicentral area within the Trans-Caspian plain and local hill areas. Some types of disturbances in relief and ground are singled out; their space distribution, interrelations and possible connection with source mechanism are analyzed.
92-105 309
Data on composition and structure of Baer's hills and their complex analysis (morphological, granulometric, min-eralogical, absolute dating, paleomagnetic, faunal, etc) allow drawing out two main types of hills, which differ by the structure of core. In one case, the core consists of two layers - upper and lower, which evidences of accumulation and washout change during their formation. In another case, the core consists of one layer. Obviously, the washout had run down the significant part of the accumulative core.



ISSN 0435-4281 (Print)