Abstract
Fish passage channels along the main delta watercourses serve for upstream spawning of fish and stingrays of young and adult fish back to sea, thereby preserving and multiplying the biodiversity of the ecosystems of the Caspian basin. The flickering sections of the canal-fish passage require periodic dredging. When analyzing the ecological and geochemical situation of the territory, one of the most informative objects of research is surface water. Accumulating pollutants coming from watersheds over a long period of time, soils are an indicator of the ecological condition of the territory, a kind of integral indicator of the level of pollution. As part of the study, an assessment was made of the ecotoxicological state of the surface waters of the fish passage channel during dredging in the Volga delta, the environmental toxicological status of the coastal zone of the canal was analyzed according to accepted standards, possible adverse environmental changes were predicted, and proposals were developed for a program of production ecological monitoring the nature of changes in surface water quality as a major component of the ecosystem.
Highlights
At present, the problems of studying the impact of anthropogenic activities on the ecological condition and qualitative characteristics of surface waters of large and small rivers are becoming quite relevant against the background of increasing economic use
As part of the study, an assessment was made of the ecotoxicological state of the surface waters of the fish passage channel during dredging in the Volga delta, the environmental toxicological status of the coastal zone of the canal was analyzed according to accepted standards, possible adverse environmental changes were predicted, and proposals were developed for a program of production ecological monitoring the nature of changes in surface water quality as a major component of the ecosystem
Studies are carried out using various methods (assessment of water quality based on the results of chemical analysis, calculation of the integral indicator of water quality - water pollution index (WPI), as well as using the method of phytotesting) [1, 2, 3]
Summary
The problems of studying the impact of anthropogenic activities on the ecological condition and qualitative characteristics of surface waters of large and small rivers are becoming quite relevant against the background of increasing economic use. Pollution of surface water bodies begins with the release of various pollutants into the waters of rivers, lakes and groundwater. The pollution of water bodies remains invisible, as the pollutants are dissolved in the water [8]
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