不同来源对塞伦加河三角洲冲积沉积物形成的贡献。(俄罗斯东西伯利亚)

Q2 Agricultural and Biological Sciences
Ellina D. Zaharova, V. Belyaev
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引用次数: 1

摘要

弄清沉积物的来源及其时空变异性,对于确定沉积物的来源和探索塞伦加三角洲景观单元的形成机制至关重要。从环境的角度来看,这种解决方案将有助于识别颗粒结合的污染源。我们使用了地球化学指纹(FingerPro R软件包),这是沉积物源分析方法的现代定量实现。主要目的是识别三角洲内沉积物和相关颗粒污染物运输和沉积的主要模式。在旧洪泛平原,55%至90%的沉积物来自上游侵蚀的洪泛平原和阶地河岸,只有约10-15%来自偏远的盆地来源。Khlystov Zaton的沉积环境比洪泛平原的沉积环境变化更大。上游5厘米层40%的沉积物来自2013年发生的洪水,30%是泛滥平原和阶地河岸侵蚀的产物。然而,对悬浮沉积物细粒成分的分析表明,来自侵蚀漫滩河岸的物质是三角洲内堆积的主要来源。这意味着自我吸收是目前塞伦加三角洲的主导过程。高洪水期间,重金属和类金属在塞伦加河下游的泛滥平原表面、三角洲湖泊和牛轭积聚。洪水期间的径流减少会导致污染物释放到贝加尔湖。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Contribution Of The Different Sources To The Formation Of Alluvial Sediments In The Selenga River Delta. (Eastern Siberia, Russia)
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.
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来源期刊
Geography, Environment, Sustainability
Geography, Environment, Sustainability Social Sciences-Geography, Planning and Development
CiteScore
2.50
自引率
0.00%
发文量
37
审稿时长
12 weeks
期刊介绍: Journal “GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY” is founded by the Faculty of Geography of Lomonosov Moscow State University, The Russian Geographical Society and by the Institute of Geography of RAS. It is the official journal of Russian Geographical Society, and a fully open access journal. Journal “GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY” publishes original, innovative, interdisciplinary and timely research letter articles and concise reviews on studies of the Earth and its environment scientific field. This goal covers a broad spectrum of scientific research areas (physical-, social-, economic-, cultural geography, environmental sciences and sustainable development) and also considers contemporary and widely used research methods, such as geoinformatics, cartography, remote sensing (including from space), geophysics, geochemistry, etc. “GEOGRAPHY, ENVIRONMENT, SUSTAINABILITY” is the only original English-language journal in the field of geography and environmental sciences published in Russia. It is supposed to be an outlet from the Russian-speaking countries to Europe and an inlet from Europe to the Russian-speaking countries regarding environmental and Earth sciences, geography and sustainability. The main sections of the journal are the theory of geography and ecology, the theory of sustainable development, use of natural resources, natural resources assessment, global and regional changes of environment and climate, social-economical geography, ecological regional planning, sustainable regional development, applied aspects of geography and ecology, geoinformatics and ecological cartography, ecological problems of oil and gas sector, nature conservations, health and environment, and education for sustainable development. Articles are freely available to both subscribers and the wider public with permitted reuse.
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