Email this article Islands of the upper River Ob: morphometric characteristic, evolution and dynamics
- Authors: Golubtsov G.B.1, Chalov R.S.1
-
Affiliations:
- Lomonosov Moscow State University, Faculty of Geography
- Issue: No 1 (2019)
- Pages: 80-90
- Section: Short communications
- URL: https://journals.eco-vector.com/0435-4281/article/view/11612
- DOI: https://doi.org/10.31857/S0435-42812019180-90
- ID: 11612
Cite item
Open Access
Access granted
Abstract
The studied reach of the upper River Ob is quite complicated in the morphological aspect and characterized by very low channel stability and high discharge of sand load. Unconstrained conditions for lateral channel migration promotes active channel deformations not only at long-term scale, but also seasonally. Channel deformations contribute to the transformation of the channel and its morphodynamic type in time. The upper River Ob is intensively used as a water course, so any reorganization of the channel and river islands should be taken into account to support navigation.
Morphometric and morphodynamic analysis of the islands made it possible to develop their morphological classification. Morphometric parameters of islands, being associated with the characteristics of the channel itself, are one of the main classification features. Empirical relations were obtained that link the dimensions (Lo, Bo) and shape of islands (Lo/Bo) with the morphodynamic channel type and its stability, the degree of branching of the channel (number of islands no per 1 km of channel length x). The features of island dynamics are also determined by the morphodynamic type of the channel and are associated with the morphometric characteristics of the islands themselves and their position in the channel, which determines the transgressive, regressive and transverse shift or their stable position in time.
Full Text
About the authors
G. B. Golubtsov
Lomonosov Moscow State University, Faculty of Geography
Author for correspondence.
Email: georgy1995golubcov@yandex.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991
R. S. Chalov
Lomonosov Moscow State University, Faculty of Geography
Email: rschalov@mail.ru
Russian Federation, 1, Leninskie gory, Moscow, 119991
References
- Popov I.V. Deformatsii rechnykh rusel i gidrotehnicheskoe stroitrlstvo (Deformation of river channels and hydrotechnic building). Leningrad: Gidrometeoizdat (Publ.), 1965. 328 p.
- Surkov V.V. Dinamika poymennykh landshaftov verkhney i sredney Obi (Dynamics of floodplain landscapes of Upper and Middle Ob River). Moscow: MSU (Publ.), 1999. 254 p.
- Chalov R.S. Geograficheskie issledovaniya ruslovykh protsessov (Geographical researching of channel processes). Moscow: MSU (Publ.), 1979. 232 p.
- Chalov R.S. Flyuvial’nye protsessy: teoriya, geografiya, praktika (Fluvial processes: theory, geog-raphy, practice). Vol. 2: Morphodynamics of river channels. Moscow: KRASAND (Publ.), 2011. 960 p.
- Chernov A.V. Geomorfologiya poym ravninnykh rek (Geomorphology of floodplains at lowland rivers). Moscow: MSU (Publ.), 1983. 198 p.
- Makkaveev N.I. Ruslo reki i eroziya v eye basseyne (River channel and erosion in its basin). Mos-cow: AN SSSR (Publ.), 1955. 347 p.
- Alekseevskiy N.I. and Chalov S.R. Gidrologicheskie funktsii razvetvlyennogo rusla (Hydrological functions of branched channel). Moscow: MSU (Publ.), 2009. 240 p.
- Chalov R.S. and Kirik O.M. The transgressive and regressive movements of the islands and is-land clusters in the braided riverbeds at the wide floodplains. Geomorfologiya (Geomorphology RAS). 2015. No. 2. P. 16–27 (in Russ.).
- Rulyova S.N. Morfologiya i dinamika rusla verkhney i sredney Obi i vliyanie na nih gidrotekhnicheskikh meropriyatiy (Morphology and dynamics of river channel of Upper and Middle Ob River and influencing of hydrotechnic events). PhD thesis. Moscow: MSU (Publ.), 1988. 30 p.
- Lyn’ Chankuan’. Sediments and geomorphologic characteristics of river channel. Nankin: Nankin Univ. (Publ.), 1991. 210 p. (in Chinese)
- Characteristics of river channel and fluvial processes at Middle and Lower Yangtze River. Pekin: Nauka (Publ.), 1985. 272 p. (in Chinese)
- Baker V.R. Stream-channel response to floods, with examples from Central Texas. Geol. Soc. Am. Bull. 1977. Vol 88. No. 8. P. 1057–1071.
- Komar P.D. Shapes of streamlined island on the Earth and Marth: Experiments and analyses of minimum-drag form. Geology. 1983. No. 11. P. 651–654.
- Tarbeyeva A.M. Forming and evolution of islands in Ob River channel, in Erozionnye, ruslovye protsessy i problemy gidroekologii (Erosional, channel processes and problems of hydroecology). Moscow: MSU (Publ.), 2004. P. 202–208.
- Ruslovye protsessy na rekah Altayskogo regiona (Channel processes on Altai rivers). Moscow: MSU (Publ.), 1996. 244 p.
- Fluvial’nye protsessy i vodnye puti na rekah Obskogo basseyna (Fluvial processes and channel ways on the rivers of the Ob River basin). Novosibirsk: RIPEL plus (Publ.), 2001. 300 p.
- Chalov R.S., Lu Shuguan and Alekseevskiy N.I. Stok nanosov i ruslovye protsessy na krupnykh rekah Rossii i Kitaya (Sediment load and fluvial processes on big rivers of Russia and China). Moscow: MSU (Publ.), 2000. 212 p.
- Makkaveev N.I. and Chalov R.S. On the relief development of river terraces surface and signs of deep erosion on the example of the Upper Ob River. Izv. Akad. Nauk SSSR. Ser. Geogr. 1964. No. 4. P. 120–125. (in Russ.)
- Makkaveyev N.I. Regressive deformations of river islands. Meteor. Gidrol. 1948. No. 4. P. 44–50. (in Russ.)
- Chalov R.S. and Zhmykhova T.V. Riverine shallows of the upper Ob: typification, morphology and hydrological-morphological analysis. Geogr. Prir. Resur. 2014. No. 4. P. 63–72. (in Russ.)
Supplementary files
