Open AccessAnnual suspended sediment load of the Yenisei river
Author(s) -
Nikita Tananaev,
Nikita Tananaev,
Roman Teisserenc,
Р Э Тейссеренк,
Théo Le Dantec,
Т О Ле Дантек
Publication year - 2019
Publication title -
izvestiâ rossijskoj akademii nauk. seriâ geografičeskaâ
Language(s) - English
Resource type - Journals
eISSN - 2658-6975
pISSN - 2587-5566
DOI - 10.31857/s2587-55662019668-82
Subject(s) - tributary , sediment , hydrology (agriculture) , bed load , rating curve , environmental science , flux (metallurgy) , channel (broadcasting) , geology , suspended load , geomorphology , sediment transport , geotechnical engineering , geography , materials science , cartography , engineering , electrical engineering , metallurgy
Field studies, including high-frequency sampling for suspended sediment flux estimation, were conducted in 20142016 in the city of Igarka, at the outlet of the Yenisei River. During spring freshet of each year, multiple suspended sediment concentration (SSC) peaks were observed, irrelated to water discharge fluctuations. The form of hysteresis loops evidences the importance of input from local in-channel sediment sources, i.e. banks and bedforms, and scouring of bed material, deposited during winter, in observed sharp SSC peaks. On the falling stage of the freshet, longer peaks are related to sediment waves from major tributaries, notably the Nizhnyaya Tunguska River. Annual sediment load was calculated based on the daily water discharge and observed SSC data, using sediment rating curves and LOADEST models as two reference methods. Mean annual suspended sediment load of the Yenisei River in Igarka is estimated at 8.1 0.5 mln t., which significantly exceeds previously published values for the 19702001 period, from 4.6 to 5.9 mln t. Cumulative sediment load for 20142016 totals 24.2 2.1 mln t.