HYDROCHEMICAL AND HYDROBIOLOGICAL CHARACTERISTICS AS KEY INDICATORS OF THE ECOLOGICAL CONDITION OF URBAN WATER BODIES

Kryzhanovskaya Galina Viktorovna  -  Candidate of Geographical Sciences, Associate Professor, Associate Professor of the Department of Geography, Cartography and Geoinformatics, Astrakhan State University named after V. N. Tatishchev, Astrakhan, Russia, 414056, Tatishchev str., 20a, GalaJim@mail.ru

Olenin Alexey Sergeevich  -  student, Astrakhan State University named after V. N. Tatishchev,

This work presents a systemic analysis of the state of water bodies in Astrakhan based on hydrochemical and hydrobiological data. The obtained data are aimed at diagnosing the level of anthropogenic load on the region's aquatic ecosystems. The study involved an analysis of key water chemistry indicators, including concentrations of heavy metals, organic pollutants, and biogenic elements. Particular attention is paid to the bioindication assessment of the state of hydrobionts (aquatic organisms), which helped determine the level of biological activity and the trophic status of the water bodies. The research results are of practical value for developing environmental protection measures and programs for the rehabilitation of water resources in the Astrakhan region.

Key words: water quality, Astrakhan reservoirs, hydrobiological methods, hydrochemical methods, in vitro studies, anthropogenic impact, water pollution, ecological condition, hydrobionts, environmental protection.