Kuksina, Liudmila and Alexeevsky, Nikolay (2015) Spatial and temporal variability of suspended sediment yield in the Kamchatka Krai, Russian Federation. In: Sediment Dynamics from the Summit to the Sea (Proceedings of a symposium held in New Orleans, Louisiana, USA, 11–14 December 2014). , ed. by Xu, Y. Jun. IAHS Publication, 367 . IAHS, Wallingford, pp. 304-311. DOI 10.5194/piahs-367-304-2015.

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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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