Agroecological assessment of bottom sediments of reservoirs in Northern Kazakhstan as an element of monitoring agricultural reservoirs
DOI:
https://doi.org/10.52269/KGTD2531280Keywords:
potassium content, phosphorus content, Karatomar reservoir, Verkhnetobol reservoir, bottom sediments, X-ray fluorescence spectral analysisAbstract
The article presents the results of a comprehensive study of bottom sediments in the coastal zones of the Verkhnetobol and Karatomar reservoirs, located within the territory of the Republic of Kazakhstan. Sampling was carried out during the winter period under stable ice cover conditions, ensuring the representativeness of the data. Particular attention was paid to the analysis of potassium and phosphorus compounds-key macronutrients forming the mineral base of bottom sediments. A predominance of potassium oxides was established, which corresponds to previously published data on freshwater bodies.
Within the framework of the study, rapid methods for analyzing the chemical composition of bottom sediments were tested and adapted using X-ray fluorescence spectroscopy, which proved effective under low-temperature conditions. The obtained results are consistent with the Guidelines for Monitoring and Assessment of Transboundary and International Lakes developed by the UNECE Working Group.
The practical significance of the work lies in the creation of a scientifically grounded foundation for regular ecological monitoring of reservoirs used in agriculture. The presented data can serve as a reference for assessing the ecological state of bottom sediment systems in temperate flowing water bodies and contribute to the improvement and implementation of rapid analysis methods for solid-phase fractions of sediments using modern instrumental approaches.