Hydrologo-geomorphological analysis of landscape formation within the selenga river delta
Tóm tắt
We examine the causes for changes in the delta surface and carry out an analysis of the area characteristics for the last 50 years. It is shown that the dynamicity of the subaerial delta surface, caused by contemporary erosion-accumulation processes, manifests itself most clearly at periods of increased hydraulicity, which promotes restructuring of the relief in elevation and plan, and of the hydrographic network. We investigate the interrelations of particular landscape components with the hypsometric position, the location relative to the main elements of the hydrographic network of the delta, and with the humidification conditions of the territory. Data are provided for the distribution and structural composition of the key vegetation species in accordance with the hydrologo-geomorphological properties of their habitat. It is found that the structural and age characteristics of plant complexes can be used to determine the transformation dynamics of topographic features and, in the future, to indicate the intensity and time intervals of delta surface reconfiguration. Based on observational evidence and remote sensing data, we carried out a landscape-hydrologo-geomorphological regionalization of the delta surface, the principal criterion of which were the intensity and directedness of the leading Hydromorphological processes. A zoning of the subaerial delta surface was instrumental in identifying different (in resistance to erosional changes) tracts of the delta and recommending the most acceptable of them for economic development of the territory.
Tài liệu tham khảo
Bogoyavleskii, B.A., Modeling of the Natural Environment of Lake-Country of the Selenga Delta, Its Dynamics and Forecasting of Development, Proc. 14th Plenary Meeting of the Geomorphological Commission of the USSR Academy of Sciences, A.N. Florensov and V.A. Nikolaev, Eds., Novosibirsk: Nauka, 1979, pp. 105–128 [in Russian].
Ecologically Oriented Land Use Planning in the Baikal Region. The Area of the Selenga Delta, A.N. Antipov and A.K. Cherkashin, Irkutsk: Izd-vo Instituta Geografii SO RAN, 2002 [in Russian].
The Selenga River Delta: A Natural Biofilter and an Indicator of the State of Lake Baikal, A.K. Tulokhonov and A.M.Plyusnin, Eds., Novosibirsk: Izd-vo SO RAN, 2008 [in Russian].
Geological Map of the USSR. Ser. Pribaikal’skaya, S.M. Zamaraev, Ed., Moscow: Nedra, 1965 [in Russian].
Korytny, L.M., Il’icheva, E.A. and Pavlov, M.V., Hydrologo-Morphological Approach to Regionalization of the Selenga River Basin, Geogr. Nat. Resour., 2012, vol. 33, issue 3, pp. 212–217.
Dong, T.Y., Il’icheva, L., Nittrouer, J.A. and Pavlov, V., Morphology and sediment transport dynamics of the Selenga River delta, Lake Baikal, Russia, American Geophysical Union Fall 2013 Annual Meeting, San Francisco. URL: http://report.rice.edu/sir/faculty.detail-p=621B49451B575FFC622AAB020321384F (Accessed 12.18.2014).
Sailing Directions and a Physical-Geographical Outline of Lake Baikal, F.K. Drizhenko, St. Petersburg: Izd-vo Glavnogo Gidrograf. Upravleniya, 1902 [in Russian].
Atlas of Lake Baikal. Compiled by the Hydrographic Expedition Under the Direction of Colonel F.K. Drizhenko, St. Petersburg: Izd-vo Glavnogo Gidrograf. Upravleniya, 1902 [in Russian].
Atlas of Lake Baikal. The Coastal Part, Irkutsk: Izd-vo Ministerstva Rechnogo Flota, 1959 [in Russian].
Dynamics of Lake Baikal’s Shores With the New Level Regime, Moscow: Nauka, 1976 [in Russian].
Ufimtsev, G.F., The Riddle of the Proval Bay, Nauka v Rossii, 2004, no. 1, pp. 74–79 [in Russian].
Konovalova, T.I., Geosystem Mapping, Novosibirsk: Geo, 2010 [in Russian].
Vinogradov, B.V., Development of the Desertification Concept, Izv. RAN, Seriya Geogr., 1997, no. 5, pp. 94–105 [in Russian].
Ilyicheva, E.A., Korytny, L.M. and Pavlov, M.V., The Channel Network of the Selenga River at Present, Vestn. Tomsk Univer., 2014, no. 380, pp. 190–194 [in Russian].