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Volume 367
Proc. IAHS, 367, 304-311, 2015
https://doi.org/10.5194/piahs-367-304-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Proc. IAHS, 367, 304-311, 2015
https://doi.org/10.5194/piahs-367-304-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.

  03 Mar 2015

03 Mar 2015

Spatial and temporal variability of suspended sediment yield in the Kamchatka Krai, Russian Federation

L. Kuksina and N. Alexeevsky L. Kuksina and N. Alexeevsky
  • Department of Hydrology, Faculty of Geography, Moscow State University, Leninskie Gory, GSP-1, Moscow, 119991, Russia

Abstract. Research into the spatial and temporal variability of suspended sediment flux (SSF, t year−1) has been conducted for rivers in the Kamchatka Krai (in the far east of the Russian Federation). The study of long-term fluctuations in SSF was based on difference-integral curve analysis. Most of the rivers in the region are characterized by two relatively long-term trends in SSF; increases from the late 1970s to the early 1980s, followed by a subsequent decline. Kamchatka was divided into regions based on similar conditions of specific suspended sediment yield (SSSY, t km−2 year−1) followed by a determination of the various factors controlling it. New maps of suspended sediment concentration (SSC, mg L−1) and SSSY for Kamchatka also were constructed and, based on this study, there currently appear to be 18 SSC and 13 SSSY regions, as opposed to 4 and 2 regions, respectively, as had been determined in the 1970s. The influence of volcanoes on SSF can be substantial, and can increase up to 5-fold after eruptions; SSC can reach 6∙105 mg L−1 in rivers draining the flanks of volcanoes.

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