HYDROGEOCHEMICAL FLOW DISTRIBUTION IN THE VOLGA RIVER DELTA

Zavadskaya, M.P.; Zavadskiy, A.S.; Kasimov, N.S.; Lychagin, M.Y.; Golovlev, P.P.; Terskii, P.N.

Авторы: Zavadskaya M.P., Zavadskiy A.S., Kasimov N.S., Lychagin M.Yu, Golovlev P.P., Terskii P.N.
Сборник: Abstracts of the 4th Int. Conf. on the Status and Future of the World’s Large Rivers
Тезисы
Год издания: 2021
Место издания: Moscow, Russia
Первая страница: 269
Последняя страница: 269
Аннотация: During three different hydrological seasons in 2018-2019 (spring flood and two summer low water periods), expeditionary studies were carried out by researchers of the Lomonosov Moscow State University in the Volga delta on total route about 3.5 thousand km long. Water discharges measured at 550 locations, collected about 800 water and 150 sediment samples. It was the first modern complex hydrogeochemical expedition carried out in such scale and three relatively short periods for the whole delta. The obtained data allowed to characterize some elements of hydrogeochemical regime within 284 relatively homogeneous branches without inflow. We have determined water discharge, suspended sediment concentration, content of 70 dissolved and 61 suspended chemical elements within each branch for flood and low water periods. All information processed and stored in the special geodatabase to perform spatial analysis and mapping of this data. The scheme of discharge time series modeling developed based on obtained runoff distribution. It takes into account the water runoff distribution between branches and inter annual variability of the total inflow to the delta. Regression analysis allowed to obtain the equations to estimate sediment load and chemical flow including seasonal variability and distribution between dissolved and suspended forms according to water flow variability. Based on this approach and datasets the Volga Delta delineated by zones of erosion, transit and accumulation of substances carried by water flow.
Добавил в систему: Терский Павел Николаевич

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