DIFFUSE BIOGENS FLOW FROM THE CATCHMENT TO THE CHEBOKSARY RESERVOIR

Yasinsky, S.V.; Kashutina, E.A.; Sidorova, M.V.; Narykov, A.N.

Авторы: Yasinsky S.V., Kashutina E.A., Sidorova M.V., Narykov A.N.
Сборник: 4th International Conference on the Status and Future of the World’s Large Rivers. Abstracts of Presentations
Тезисы
Год издания: 2021
Место издания: Moscow, Russia
Первая страница: 245
Последняя страница: 245
Аннотация: After the 1990 the water use in Russia has decreased significantly (up to 30%). Though, significant improvement in the surface water quality, especially in the basin of Volga the main Russian river, has not happened. Unsatisfactory water quality in the Volga basin seems to be a result of uncontrolled nonpoint (or diffuse) pollution from catchments as it is assumed in the national project “Enhancement of the Volga River”.Diffuse pollution means removal of dissolved and suspended pollutants from non point sources (agricultural lands, settlements without central sewage system, landfills, industrial sites) with slope and underground runoff.High level of inorganic nitrogen and phosphorus is one of the main factors of eutrophication and algal water blooming. This study is aimed to estimate the diffuse flow of biogens by tributaries to Cheboksary Reservoir (local watershed area 135000 km2, water surface area is 1080 km2). The landscape-hydrological method was used to estimate the average long-term biogen diffuse flow from the reservoir catchment. The method considers catchment landscape structure (forest, agricultural lands, rural and urban areas, ravine network); anthropogenic load (mineral and organic fertilizer application, human biowaste). The effect of the nutrients retention depending on the catchment area and the volume of water flow is taken into account in calculations. The diffuse flow of biogens by surface, soil and underground runoff is calculated for the spring flood and the whole year.Due to natural and anthropogenic factors the average long-term diffuse biogens flow of nitrogen is 20500 tons and of phosphorus is 900 tons both in mineral form. Underground and perched runoff plays significant role in nutrients removal.The study completed according to the state assignment № 0148-2019-0007.
Добавил в систему: Кашутина Екатерина Александровна

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