ASSIMILATION CAPACITY OF THE MARGINAL FILTER OF THE ECOSYSTEM OF THE ESTUARINE COAST OF THE VOLGA

According to the data of long-term observations, the assessment of the degree of impact of copper and zinc on the ecosystem of the shallow part of the estuarine coast of the Volga River was carried out. There are the ideas of the marginal filter and the assimilation capacity were used in the article. The calculation of the assimilation capacity for a marginal filter significantly based on the dimensional characteristics, such as the estuarine region of the Volga River, was carried out at several points located within the estuarine seashore. In this work the century-old sections of the state observation network were used. It can be seen from the calculated data that the value of the assimilation capacity is subject to significant intra-and inter-annual fluctuations. The main parameter determining the volume of the assimilation capacity of copper and zinc is fairly called the flow of the Volga River. According to the results of the study, it can be argued that the observed level of copper and zinc runoff into the Caspian Sea is completely assimilated in the shallow part of the seashore.