Paradigms of geomorphology and their changes during its history are under consideration. Historical-genetic paradigm was predominant during the first of the 20th century. It was feologically oriented. In the middle of the century morphodynamic paradigm, more geofraphical one, was established. It has allowed modem geomorphology to come to solution of ecological tasks. In the near future the problems of three major types - geological, geographical and ecological will stay in the sphere of interest of geomorphology. Aesthetic geomorphology becomes one of the new lines, the aesthetic properties of geomorphological landscapes being its object.
The types and the results of multiannual cooperation of Geomorphology Chair of the MSU with different institutes of the RAS are described. The importance of the connections between MSU and RAS is emphasized. The sequence may be seen: university education - mutual learning - mutual investigations - staff exchange - ideas exchange -scientific cooperation - the improvement of the university education.
The main results of large collective work at the map of recent geomorphologic processes of Northern Eurasia (the former USSR) are represented. Important space characteristic of exogenous, endogenous and man induced processes are described. The mapping of such processes within the large territory is proved to be possible. The process of recent geomorphogenesis is multifactor one and the existent landforms appear to be the leading of these factors. The straight correspondence between natural zones and space distribution of the geomorphic processes is absent.
Методика научных исследований
The method of ecologeomorphological ratable mapping is suggested, the tectonically active mountain areas of different regions and landscapes taken as an example. The method is based on using of spectrozonal space images. Criteria and indexes of environmental deterioration according to natural factors are developed. Principles of middle-large scale mapping are worked out. For the first time ratable ecologeomorphological mapping was fulfilled for some mountain test sites: the Great Caucasus, the Northern Osetia, the northern part of Kuril Isis - in the moderate zone, Andes (Chile-Argentina) - in the subtropical zone, Sierra-Maestra (Cuba) - in the tropical zone. Method of space indication of dangerous slope processes is improved. Unlike other geomorphologic techniques this method allows to determine the boundaries of the dangerous processes with high precision and validity.
Verification of Russian erosion models, using for evaluation of landless by melt water runoff, showed that the best results may be obtained by the equation of SHI, though it can't be used for soil protection projecting. We have improved this equation to exclude this defect. For this purpose the function of the slope length was given as an explicit one, the new slope gradient factor was included, the slope runoff was used instead of river's one, the soil erodibility was evaluated more accurately, the impact of slope gradient and granulometric composition of soil on the runoff coefficient was taken into account.
Научные сообщения
Quantitative estimation of seismogenic denudation is a relatively new problem, which is on initial stage of its development. It was firstly shown in this work (for the Tonka earthquake, June 30, 1995) that earthquake of moderate intensity (force 6) causes the denudation of the slopes in the vicinity of active faults. Seismo-gravitational processes remove from the surface the layer up to 12-13 mm in thickness. This denudation occurs during few seconds of seimic event, while the same effect due to normal processes would take years.
The new maps of Quaternary and recent tectonic movements were compiled with the use of new geologic-geomorphologic and geodetic data.
First quantitative estimation of gully erosion hazard has been fulfilled for the European part of Russia. The risk of gully erosion was calculated in ha/year km2 - specific area losses. The maps of recent and prognostic gully areas at the scale 1:1500 000 (compiled in the Laboratory of Soil Erosion and Channel Processes, Gepgraphical department, MSU) were used as well as data on gully network development.
The Golan Heights - the basaltic plateau at the NE flank of the Dead Sea rift - is one of the areas where interaction between tectonics, volcanism and relief takes place. During the active period of the rift history (Middle Miocene - Upper Pleistocene) various volcanic landscapes were formed at the Golan plateau and at d1e neighbouring volcanic field El-Shamma. Different types of volcanic relief-forming processes in this area were controlled by tectonics. In the post-eruption stage climate became the main factor of landforms development Different volcanic landforms (such as basaltic plateaux, cinder and lava cones etc.) are analysed and classified in this article.
The data obtained by the parametric fathometer "Arasound" in 1997 during the run of the research ship "Academician Sergey Vavilov" in the easter part of the White Sea were processed. Six accumulative and two erosion tidal landform types are characterized. Sand ridges, sand waves of two types, sand ripple and glib sands may be mentioned among accumulative forms. The conditions of such landform existence and their distribution within the area are discussed.
Complex geomorphological development of the territory under consideration caused the existence of several subhorizontal denudation surfaces within the height's range of 105-350 m. Uncorisolidated sediments of low thickness occurring on these surfaces serve as intermediate collectors. Their erosion makes the pattern of recent slope aureoles rather complicated and causes their propagation up the slopes and over local watersheds.
Data on mutual position of alluvial suits in the valley cross-section of the upper stream Kolyma are described. The data indicate the complex structure of terrace sequence. Three of the seven Pleistocene alluvial suits are buried. Incompleteness of terrace sequences is due to this fact more than to bad preservation of terraces during valley formation.
Хроника
26-29 апреля 1999 г. в г. Ижевске на базе Удмуртского государственного университета прошло рабочее совещание Межвузовского научно-координационного Совета по проблеме эрозионных, русловыми устьевых процессов при МГУ. В работе совещания приняли участие ученые Башкирского, Казанского, Московского, Пермского, Удмуртского университетов, представители Комитета по охране окружающей среды Удмуртской республики и Ижевского городского комитета по охране окружающей среды, ОАО "Удмуртнефть". Был рассмотрен широкий круг вопросов, затрагивающих проблему малых рек и эрозии почв на их водосборах.
Потери науки
27 апреля 1999 г. скончался Алексей Сергеевич Ионин - один из крупнейших специалистов в области морской геоморфологии, старейший сотрудник Института океанологии им. П.П. Ширшова РАН.
ISSN 2949-1797 (Online)