MAPPING OF THE GEOECOLOGICAL SITUATION OF AGGLOMERATE WATERCOURSES ON THE EXAMPLE OF THE KUTUM BRANCH OF THE CITY OF ASTRAKHAN BASED ON CHEMICAL ANALYSIS OF SURFACE WATERS

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

Starkov Egor Vladimirovich  -  student, Astrakhan State University named by V.N. Tatishchev, Astrakhan, Russia, 414056, Tatishchev str., 20a, egorstarkov712@gmail.com

Sheremetov Rasul Khusainovich  -  student, Astrakhan State University named by V.N. Tatishchev, Astrakhan, Russia, 414056, Tatishchev str., 20a,

Geoecological monitoring of the Kutum branch in the city limits of Astrakhan using laboratory methods of chemical analysis in vitro was carried out. The analysis of the content of heavy metals in the surface waters of the studied watercourse included the measurement of concentrations of manganese, lead, iron, copper, zinc, cadmium, nickel in accordance with the methodology for measuring the mass concentration of elements in samples of natural waters. Laboratory studies have shown a change in the hydrochemical characteristics of water due to both natural and anthropogenic factors. Priority pollutants have been identified from among those studied in natural water. A series of thematic evaluation cartographies has been developed, created using GIS technologies, displaying quantitative and qualitative characteristics of a watercourse in spatio-temporal terms. The need for comprehensive geoecological monitoring of the condition of watercourses as functioning aquatic landscape systems has been determined.

Key words: aquatic complexes, urbanized territory, geochemical analysis, laboratory studies, environmental monitoring, anthropogenic load, analysis methods, surface water quality