Environmental monitoring of the Sudomoyka river in the Volgo-Ahtubinsky floodplain

The paper is devoted to ecological monitoring and system analysis of the Volgograd Region (the Sudomoyka Erik) reservoir. Environmental monitoring was conducted from March 2017 to February 2018. The set of studies included: determination of water organoleptic characteristics, the amount of dissolved oxygen in the water, pH value, a dry residue and bioindication. The authors note microorganism number increase: Synedra, Spirogyra, Mougeotia in July and September 2017 and in February 2018 which are biological indicators of water quality. The presence of a high number of microorganisms-bioindicators testifies to the supersaturation of water with oxygen and the formation of organic substances. The authors found an increase in salinity of water in March, July and December 2017, February 2018. In winter in the water of the Sudomoyka Erik the authors found large amounts of mucus, eggs of various insects, organic dirt, which indicates the water pollution in the winter. Water quality in the Sudomoyka Erik is unsatisfactory, the Eric is classified as a slightly polluted body of water. The Sudomoyka Erik cannot be used for domestic purposes by residents of nearby settlements and is unfavorable for swimming in summer. The ecological state of the Sudomoyka Erik determines the ecological state of the entire natural complex of the Volga-Ahtubinsky floodplain