Diffuse biogenic load from the catchment area of small watercourses

Alexander V Lyubimov ,Г Т Фрумин ,P Egorov ,Evgeny M Nesterov

doi:10.1051/e3sconf/202016901006

Alexander V Lyubimov , Г Т Фрумин + Show 2 more

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https://doi.org/10.1051/e3sconf/202016901006

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Abstract

The article systematizes information on quantitative parameters for assessing the modules of the background runoff of nutrients (total phosphorus and total nitrogen) with the catchment of rivers and lakes. A new approach proposed for estimating the modules of the background runoff of nutrients based on mathematical models. A methodology for calculating the modules of the background runoff of nutrients from the catchments of the rivers of the Baltic Sea basin developed. The study of the dependence of the trophic level of the water reservoir on the amount of phosphorus and nitrogen entering it led to the development of the so-called load concept, which is based on the idea of the existence of a quantitative relationship between the amount of phosphorus intake and the reaction of the reservoir. The maximum allowable export to the Gulf of Finland is 4860 t/year of total phosphorus and 106680 t/year of total nitrogen. These values significantly exceed the total load on the Novaya river from its catchment area: 0.072 t/year for total phosphorus and 0.066 t/year for total nitrogen.

Highlights

Irresponsible attitude to the ecology of small rivers exacerbates the already serious problem of water on the Earth, the problem that can be generally formulated as a contradiction between the increasing public demand for high quality water, on the one hand, and its continuing deterioration, on the other
Fields are a source of systematic ingress of chemical elements into the hydraulic system, along with the rain-washing out of fertilizers and pesticides
The maximum allowable export to the Gulf of Finland is 4860 t/year of total phosphorus and 106680 t/year of total nitrogen. These values significantly exceed the total load on the Novaya river from its catchment area: 0.072 t/year for total phosphorus and 0.066 t/year for total nitrogen

Summary

Introduction

Irresponsible attitude to the ecology of small rivers exacerbates the already serious problem of water on the Earth, the problem that can be generally formulated as a contradiction between the increasing public demand for high quality water, on the one hand, and its continuing deterioration, on the other. This deterioration is most significantly connected with chemical water pollution. Agricultural land covers 2900 hectares, 90% of the total amount of which are arable land of 2,600 hectares This category of land represents a certain danger for the hydraulic system due to possible flushing of the treated soil into the system of hydromelioration and in the Novaya riverbed.

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