Suspended Sediment Yield Characteristics Variability in Rivers of Kamchatka Krai
https://doi.org/10.31857/S2587-55662019152-61
Abstract
The regularities of spatiotemporal variability of suspended sediment yield characteristics were studied. Based on the analysis of difference-integral yield curves, it was found that most of the rivers in Kamchatka krai are characterized by the presence of two relatively long trends in the suspended sediment yield variability: an increase until the end of the 1970s-early 1980s, and its subsequent decrease. This regularity disturbs in rivers under the influence of volcanic eruptions, where the most significant increasing of sediment yield is observed after major eruptions. Existent maps of mean annual suspended sediment concentration and mean annual specific suspended sediment yield were significantly specified (18 instead 4 and 13 instead two zones were marked respectively). The map of grain-size distribution of suspended sediment was compiled (three zones was marked in region under study). Maximum values of mean annual specific suspended sediment yield (more than 500 t km-2 yr-1), suspended sediment concentration (more than 1000 g m-3) and grain-size of sediments are observed in water runoff of volcanic areas. Minimum values of suspended sediment concentration, specific suspended sediment yield, as well as grain-size of sediments characterized the mainland part of the krai.
Keywords
grain-size distribution of suspended sediment,
suspended sediment concentration,
water runoff,
volcanism
Supporting agencies: President RF grant (project no. MK 5835.2016.5);Russian science Foundation, project no. 17-77-10047
About the Author
L. V. Kuksina
Lomonosov Moscow State University
Russian Federation
Russian Federation
Faculty of Geography
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- Water runoff and suspended sediment yield had been increasing till late 1970s – early 1980s, and then started decreasing.
- The author distinguished 18 zones of suspended sediment concentration and 3 zones of sediment particles distribution on the territory of Kamchatka Krai.
- Maximum concentration and yield of suspended sediments are observed in areas close to active volcanoes.
Review
For citations:
Kuksina L.V. Suspended Sediment Yield Characteristics Variability in Rivers of Kamchatka Krai. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2019;(1):52-61. (In Russ.) https://doi.org/10.31857/S2587-55662019152-61
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