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Article

Factors Controlling Contemporary Suspended Sediment Yield in the Caucasus Region

1
Institute of Geography, Russian Academy of Sciences, Staromonetny St., 29, 119017 Moscow, Russia
2
Faculty of Geography, Lomonosov Moscow State University, Leninskie Gory, 1, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Academic Editor: Achim A. Beylich
Water 2021, 13(22), 3173; https://doi.org/10.3390/w13223173
Received: 7 October 2021 / Revised: 4 November 2021 / Accepted: 8 November 2021 / Published: 10 November 2021
(This article belongs to the Special Issue Effect of Soil Erosion on the Water Environment)
This paper discusses the joint impact of catchment complexity in topography, tectonics, climate, landuse patterns, and lithology on the suspended sediment yield (SSY, t km−2 year−1) in the Caucasus region using measurements from 244 gauging stations (GS). A Partial Least Square Regression (PLSR) was used to reveal the relationships between SSY and explanatory variables. Despite possible significant uncertainties on the SSY values, analysis of this database indicates clear spatial patterns of SSY in the Caucasus. Most catchments in the Lesser Caucasia and Ciscaucasia are characterized by relatively low SSY values (<100–150 t km−2 year−1), the Greater Caucasus region generally have higher SSY values (more than 150–300 t km−2 year−1). Partial correlation analyses demonstrated that such proxies of topography as height above nearest drainage (HAND) and normalized steepness index (Ksn) tend to be among the most important ones. However, a PLSR analysis suggested that these variables’ influence is likely associated with peak ground acceleration (PGA). We also found a strong relationship between land cover types (e.g., barren areas and cropland) and SSY in different elevation zones. Nonetheless, adding more gauging stations into analyses and more refined characterizations of the catchments may reveal additional trends. View Full-Text
Keywords: sediment yield; suspended sediment; Caucasus; soil erosion; denudation rates sediment yield; suspended sediment; Caucasus; soil erosion; denudation rates
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MDPI and ACS Style

Golosov, V.; Tsyplenkov, A. Factors Controlling Contemporary Suspended Sediment Yield in the Caucasus Region. Water 2021, 13, 3173. https://doi.org/10.3390/w13223173

AMA Style

Golosov V, Tsyplenkov A. Factors Controlling Contemporary Suspended Sediment Yield in the Caucasus Region. Water. 2021; 13(22):3173. https://doi.org/10.3390/w13223173

Chicago/Turabian Style

Golosov, Valentin, and Anatoly Tsyplenkov. 2021. "Factors Controlling Contemporary Suspended Sediment Yield in the Caucasus Region" Water 13, no. 22: 3173. https://doi.org/10.3390/w13223173

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