caa a22 4500 475827368 CHVBK 20180406123832.0 cr unu---uuuuu 170329e20001201xx s 000 0 eng 10.1007/s005310000132 doi (NATIONALLICENCE)springer-10.1007/s005310000132 Channel morphology and river flow in the northern Russian Plain in the Late Glacial and Holocene [Elektronische Daten] [A. Y. Sidorchuk, A. V. Panin, O. K. Borisova, S. A. Elias, J. P. Syvistki] Abstract.: The relicts of large meandering palaeochannels are found throughout the territory of the periglacial zone of the Last (Valdai=Weichselian) Glaciation on the Russian Plain. Channel widths of macromeanders can be 15 times larger than the recent meanders of the same rivers. Palaeolandscape and palaeohydrological reconstructions show that these periglacial river channels were formed under conditions of high spring water flow, up to eight times greater than the modern discharges, when the flow coefficient was close to 0.9-1.0 due to presence of permafrost, summers were dry and streams lacked ground water supply. Permafrost degradation increased soil permeability in spring and increased ground water flow in summer, causing a decrease of annual flow (due mainly to the flood flow decrease in spring). As a result, large periglacial channels were abandoned and transformed into lakes and bogs. Late Holocene channels have much smaller channel widths and meander lengths. These were formed under conditions of lower annual flows and much steadier flow regime. Springer-Verlag, 2000 Periglacial landscapes Palaeochannels Palaeohydrology Change of hydrologic regime Late Weichselian/Holocene Northern Russian Plain nationallicence Sidorchuk A. Y. Geographical Faculty, Moscow State University, 119899 Moscow, Russia aut Panin A. V. Geographical Faculty, Moscow State University, 119899 Moscow, Russia aut Borisova O. K. Institute of Geography, Academy of Sciences, Staromonetny 29, 109017 Moscow, Russia aut Elias S. A. Institute of Arctic and Alpine Research, Campus Box 450, University of Colorado, Boulder, CO 80309, USA aut Syvistki J. P. Institute of Arctic and Alpine Research, Campus Box 450, University of Colorado, Boulder, CO 80309, USA aut https://doi.org/10.1007/s005310000132 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005310000132 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Sidorchuk A. Y. Geographical Faculty, Moscow State University, 119899 Moscow, Russia aut NATIONALLICENCE 700 1- Panin A. V. Geographical Faculty, Moscow State University, 119899 Moscow, Russia aut NATIONALLICENCE 700 1- Borisova O. K. Institute of Geography, Academy of Sciences, Staromonetny 29, 109017 Moscow, Russia aut NATIONALLICENCE 700 1- Elias S. A. Institute of Arctic and Alpine Research, Campus Box 450, University of Colorado, Boulder, CO 80309, USA aut NATIONALLICENCE 700 1- Syvistki J. P. Institute of Arctic and Alpine Research, Campus Box 450, University of Colorado, Boulder, CO 80309, USA aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer