SEDIMENT DISCHARGE OF SMALL RIVERS IN AREAS OF ACTIVE VOLCANISM (River Sukhaya Elizovskaya, Kamchatka)

S. R. Chalov; A. S. Tsyplenkov

doi:10.15356/0435-4281-2017-1-104-116

SEDIMENT DISCHARGE OF SMALL RIVERS IN AREAS OF ACTIVE VOLCANISM (River Sukhaya Elizovskaya, Kamchatka)

S. R. Chalov, A. S. Tsyplenkov

https://doi.org/10.15356/0435-4281-2017-1-104-116

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Abstract

Paper is devoted to the study of seasonal features of sediment run-off formation of the Sukhaya Elizovskaya small river, flowing on the active volcanoes Avachinsky and Koryaksky slopes (the Kamchatka region). Informations about diurnal (at 5–10 minutes interval) and seasonal fluctuations of water and sediments run-off in different geologic-geomorphologic conditions, specific for the basin, are provided, based on the field observations and MUSLE erosional modelling. Within the upper sections of the river network – on the volcanoes slopes and submontane territories with mean steepness – the sediment run-off is characterised 10-fold diurnal variations and is relatively low (less than 0.1 t/km2 per day). Within lahar valleys the maximal sediment run-off is noted (during given periods of studying – more than 10 t/km2 per day), which compounds more that 90% of solid run-off outward the Sukhaya Elizovskaya river basin. 100-fold variations of water silt content and extraordinarly high rates of material repedosition within the river valley are noted in these water streams (during given periods of studying – up to 11.3 t/day).

Keywords

sediment discharge, volcanic area, lahar valleys, Kamchatka

About the Authors

S. R. Chalov

Lomonosov Moscow State University
Russian Federation
Faculty of Geography

A. S. Tsyplenkov

Lomonosov Moscow State University
Russian Federation
Faculty of Geography

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Review

For citations:

Chalov S.R., Tsyplenkov A.S. SEDIMENT DISCHARGE OF SMALL RIVERS IN AREAS OF ACTIVE VOLCANISM (River Sukhaya Elizovskaya, Kamchatka). Geomorfologiya. 2017;(1):104-116. (In Russ.) https://doi.org/10.15356/0435-4281-2017-1-104-116