Abstract:
The Nura River is an important water artery of Central Kazakhstan, feeding the network of lakes of
the Korgalzhyn Nature Reserve, normal functioning of which depends on the quality of incoming Nura river waters,
since the river flows through the territory of two regions undergoing technogenic and anthropogenic pollution.
Assessment of quality of waters flowing into lakes is an important element in monitoring studies.
The article assesses the ecological state of the Nura River by biogenic elements in three observation points - the
village of Romanovka, the village of Sabyndy, the village of Korgalzhyn during the period from 2015 to 2018. An
analysis of the dynamics of receipt ofbasic biogenic elements, such as ammonium salt, nitrite nitrogen, nitrate nitrogen, and phosphates was carried out. The results of the analysis indicate pollution of the river in all the investigated
points with ammonium salts and nitrite nitrogen. The content of nitrate nitrogen and phosphates does not exceed the
maximum permissible concentrations (MPCs). The main source of pollution can probably be nearby settlements, the
main activity of which is related to agriculture. The main periods of pollution are the summer seasons in all years.
The investigated points on the degree of pollution belong to a moderate level of pollution.
