| Инд. авторы: | Zobkov M.B., Potakhin M.S., Subetto D.A., Strakhovenko V.D. |
| Заглавие: | Estimation of sediment sources and budget at lake onego watershed after the last glaciation with gis modeling and sediment geochemistry |
| Библ. ссылка: | Zobkov M.B., Potakhin M.S., Subetto D.A., Strakhovenko V.D. Estimation of sediment sources and budget at lake onego watershed after the last glaciation with gis modeling and sediment geochemistry // Limnology and Freshwater Biology. - 2020. - Iss. 4. - P.478-480. - EISSN 2658-3518. |
| Внешние системы: | DOI: 10.31951/2658-3518-2020-A-4-478; РИНЦ: 44422875; |
| Реферат: | eng: GIS modeling was performed to assess sediment budget of Lake Onego in the Late Glacial time. For this purpose, the procedure of river valley recognition was conducted using Digital Elevation Model and Topographic Position Index for the watershed of Lake Onego. The lake lost its connection with a glacier ca. 12 ka BP. This time silty clays began to accumulate in the lake, thus this period was selected as a starting point for our calculation. The Lake Onego watershed was at least twice larger as compared with the modern one and extended more than 300 km southward out of the modern watershed border. The calculated sediment budget was varied from 13.4 to 49.4 km3. Our estimates also demonstrate that the share of sediments eroded from the Russian Platform was on several times higher, than from the Baltic Crystalline Shield. This was also evidenced by vertical geochemical structure of Lake Onego sediments. A gradual increase was observed in the share of the Russian Platform clays sedimentary rocks from north to south direction achieving their full prevalence in sediments of the southern part of Lake Onego.
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| Ключевые слова: | gis; sediments; lake Onego; watershed; Late Glacial; |
| Издано: | 2020 |
| Физ. характеристика: | с.478-480 |
| Цитирование: | 1. Argus D.F., Peltier W.R., Drummond R., Moore A.W. 2014. The Antarctica component of postglacial rebound model ICE-6G_C (VM5a) based upon GPS positioning, exposure age dating of ice thicknesses, and relative sea level histories. Geophysical Journal International 198(1): 537-563
2. Quaternary deposits of Finland and northwestern part of Russian Federation and their resources. Scale 1:1 000 000. 1993. In: Niemela J., Ekman I., Lukashov A. (Eds.) Petrozavodsk: Geological survey of Finland and Russian Academy of Sciences. Institute of Geology
3. Weiss A. 2001. Topographic position and landforms analysis. Poster presentation. In: ESRI user conference, San Diego, CA, pp. 200
4. Zobkov M., Potakhin M., Subetto D., Tarasov A. 2019. Reconstructing Lake Onego evolution during and after the Late Weichselian glaciation with special reference to water volume and area estimations. Journal of Paleolimnology 62(1): 53-71
5. Zobkov M.B., Subetto D.A., Potakhin M.S. 2018. The watershed reconstruction of the Onego paleolake with GIS. Lateglacial-Interglacial transition: glaciotectonic, seismoactivity, catastrophic hydrographic and landscape changes. Petrozavodsk, pp. 126-127
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