Suspended Sediment Yield Characteristics Variability in Rivers of Kamchatka Krai
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...
| Published in: | Izvestiya Rossiiskoi akademii nauk. Seriya geograficheskaya |
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| Main Authors: | , |
| Other Authors: | , , , |
| Format: | Article in Journal/Newspaper |
| Language: | Russian |
| Published: |
Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya
2019
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| Subjects: | |
| Online Access: | https://izvestia.igras.ru/jour/article/view/856 https://doi.org/10.31857/S2587-55662019152-61 |
| Summary: | 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. Исследованы закономерности пространственно-временной изменчивости характеристик стока взвешенных наносов. На основе анализа разностно-интегральных кривых стока установлено, что для большей части рек на территории Камчатского края характерно наличие двух относительно продолжительных периодов изменения стока взвешенных наносов — увеличения до конца 1970-х — начала 1980-х годов и его последующего уменьшения. Данная закономерность нарушается в реках, испытывающих воздействие вулканических извержений, где наибольшее возрастание стока наносов наблюдается после крупнейших извержений. Значительно уточнены существующие карты распределения средней многолетней мутности воды (выделено 18 зон вместо 4) и среднего многолетнего модуля стока взвешенных ... |
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