Contribution Of The Different Sources To The Formation Of Alluvial Sediments In The Selenga River Delta. (Eastern Siberia, Russia)

Author:

Zaharova Ellina D.1,Belyaev Vladimir R.2

Affiliation:

1. Institute of Geography, Russian Academy of Sciences

2. Lomonosov Moscow State University

Abstract

Unraveling sources of sediment supply, their temporal and spatial variability is of key importance to determine origin of deposits and to explore the formation mechanism of Selenga Delta landscape units. From an environmental point of view this solution would help to identify the particle-bound pollution sources. We used geochemical fingerprinting (the FingerPro R package), which is a modern quantitative implementation of the method of sedimentary provenance analysis. The main aim was to recognize the main patterns of sediment and associated particle-bound pollutants transport and deposition within the delta. At the old floodplain from 55% to 90% of sediments were delivered from the eroded floodplain and terrace banks upstream and only about 10-15% originates from the remote basin sources. Sedimentary environment in the Khlystov Zaton reveals a greater variety than on the floodplains. 40% of sediments from the upper 5 cm-layer originated from the flood, taking place in 2013, and 30% were the product of floodplain and terraces banks erosion. Nevertheless, analysis of the fine-grained component of suspended sediment sets the material from eroded floodplain banks as the dominant source of accumulation within the delta. This means that the self-absorption is the leading process in the Selenga delta at the moment. Heavy metals and metalloids accumulates in the lower reaches of the Selenga on the floodplain surface, deltaic lakes and oxbows during high floods. Runoff decrease during floods can lead to the release of pollutants into the Lake Baikal.

Publisher

Russian Geographical Society

Subject

Environmental Science (miscellaneous),Geography, Planning and Development

Reference35 articles.

1. Bazhenova O.I. et al. (1979). Spatio-temporal analysis of the dynamics of erosion processes in the south of Eastern Siberia.

2. Bogoyavleskii B.A. (1979). Modeling of the Natural Environment of Lake-Country of the Selenga Delta, Its Dynamics and Forecasting of Development, Proc. 14th Plenary Meeting of the Geomorphological Commission of the USSR Academy of Sciences, 105–128 (in Russian).

3. Budaev R.Ts., Kolomiets V.L. (2014). Natural and climatic reconstructions of the Late Pleistocene and Holocene of Baikal Siberia based on the results of studying the Ust-Selenga depression eolian morpholithogenesis. Proceedings of the Samara Scientific Center of the Russian Academy of Sciences, 16(1-4), 1059-1062(in Russian).

4. Chalov R.S. (2008). Comparative analysis of channel processes on mountain, semi-mountain and plain rivers. Geography and natural resources, 29.1, 28-35, DOI: 10.1016/j.gnr.2008.04.006.

5. Chalov S., Thorslund J., Kasimov N., Aybullatov D., Ilyicheva E., Karthe D., ... & Jarsjö J. (2017). The Selenga River delta: a geochemical barrier protecting Lake Baikal waters. Regional environmental change, 17(7), 2039-2053, DOI:10.1007/s10113-016-0996-1.

Cited by 2 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3