Modern Changes of Nutrients’ Removal into the Southern forest zone Rivers of volga Basin
https://doi.org/10.31857/S2587-55662019543-55
Abstract
The article analyzes on the example of the Linda river basin, the tributary of the Cheboksary reservoir, contribution of the main elements of its vertical hydrological structure (precipitation, surface and underground runoff, “verhovodka” runoff) in the formation of nutrients’ removal from rivers’ catchments in the southern forest zone of the Russian plain. The removal of nutrients from the Linda river catchment area with various elements of water flow for the year, its high-water and low-water periods was calculated. It is shown that due to the increased role of the changed hydro-climatic conditions, especially due to the increased flow of infiltration origin (underground and “verhovodka” runoff), the nutrients’ removal has increased in recent years. Anthropogenic component of nutrient leaching into the Cheboksary reservoir from Linda river catchment was identified. It is reduced in recent decades by the background dispersion in the catchment, diffuse nutrients leaching to surface and underground flow of natural origin.
About the Authors
S. V. Dolgov
Institute of Geography, Russian Academy of Sciences
Russian Federation
Russian Federation
N. I. Koronkevich
Institute of Geography, Russian Academy of Sciences
Russian Federation
Russian Federation
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Graphical Abstract
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1. The migration of phosphorus from the basin of the river Linda | |
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| Type | Исследовательские инструменты | |
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- A significant reduction in the use of fertilizers, a decrease in sown area and the number of livestock did not lead to a decrease in the removal of nitrogen and phosphorus from the Linda river basin.
- In the southern part of the forest zone in the Volga basin, migration into the river network of natural nitrogen and phosphorus predominates.
- Due to changes in climatic conditions, the removal of nitrogen and phosphorus from the river basin increased by more than 25%.
- For 2008–2018, the role of underground flow in the migration of nitrogen and phosphorus has increased markedly.
- The removal of nitrogen and phosphorus from the Linda river basin in the seasons of the year with low water flow is significant and amounts to 45–50% of the volume of removal for the entire annual period.
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For citations:
Dolgov S.V., Koronkevich N.I. Modern Changes of Nutrients’ Removal into the Southern forest zone Rivers of volga Basin. Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya. 2019;(5):43-55. (In Russ.) https://doi.org/10.31857/S2587-55662019543-55
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