Suspended sediment budget and intra-event sediment dynamics of a small glaciated mountainous catchment in the Northern Caucasus

Tsyplenkov, A.; Vanmaercke, M.; Golosov, V.; Chalov, S.

Авторы: Tsyplenkov A., Vanmaercke M., Golosov V., Chalov S.
Журнал: Journal of Soils and Sediments
Том: 20
Номер: 8
Год издания: 2020
Издательство: Ecomed Verlagsgesellschaft AG & Co.
Местоположение издательства: Germany
Первая страница: 3266
Последняя страница: 3281
DOI: 10.1007/s11368-020-02633-z
Аннотация: The sediment dynamics of (peri-)glacial catchments can be highly variable and complex. Understanding these dynamics and their underlying causes is not only of interest from a scientific perspective but also required to address the practical problems with which they are often associated. In order to better understand the sediment dynamics of glaciated mountainous catchments, suspended sediment fluxes in the 9.1 km² Djankuat catchment (North Caucasus, Russia) were monitored intensively during the 2017 ablation season. The intra-event suspended sediment dynamics were studied using a newly proposed simple hysteresis index (SHI), quantifying to what extent evolutions in sediment concentration are characterized by a clockwise or anticlockwise hysteresis loop. The resulting catchment suspended sediment yield was 1033 t km−2 year−1, with the glacier itself contributing 72% of the suspended sediment load. However, during rainfall events, also hillslope erosion in the proglacial area became a very significant sediment source. Clockwise hysteresis loops occurred in 61.8% of the events, while anticlockwise in 11.8%. On the other hand, only 47.8% of the total suspended sediment flux was transported during clockwise events. Our observations clearly indicate that events showing a stronger clockwise pattern (i.e., a higher SHI) are associated with a larger sediment input from the proglacial area. Overall, our results provide data and insights on sediment dynamics in an understudied environment. They illustrate that the type and characteristics of sediment concentration hysteresis loops are to some extent linked to the dominant sediment sources during the event. As such, the proposed methodology and SHI may also help with a better understanding of sediment dynamics in other environments.
Добавил в систему: Цыпленков Анатолий Сергеевич

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

Интеллектуальная Система Тематического Исследования НАукометрических данных

Suspended sediment budget and intra-event sediment dynamics of a small glaciated mountainous catchment in the Northern Caucasusстатья

Прикрепленные файлы