Assessment of a Zelvyanskoye riverine reservoir for its restoration and enhancement of recreational value (Grodno region, Belarus)

   The article presents the results of a study of the hydrological regime, as well as hydrochemical and hydrobiological parameters of the Zelvyanskoye Reservoir during 2024, in order to support fish stocking activities in accordance with the biological justification developed in 2023. Changes in the hydrological regime were evaluated in relation to seasonal water level regulation. The quantitative and qualitative composition of phytoplankton was analyzed, including the identification of potentially toxic cyanobacterial forms. Based on the collected data, a set of measures was developed improve fish habitats, stabilize fish resources, and enhance the recreational value of the reservoir. The bioreclamation measures proposed by the authors, taking into account the reduction of the degree of overgrowth of the reservoir to a level that is necessary and reasonable, as well as control over the further development of macrophyte vegetation in it, are aimed at increasing the fish productivity of the water body and expanding the species composition of fish attractive to potential tourists, while simultaneously reducing the abundance of less attractive species. Given the characteristics of the fish habitat and the trophic capacity of the reservoir, as well as the recreational orientation of stocking, the following fish species are recommended for introduction: European catfish (in order to form a self-reproducing stock) and pike (to increase the number of predators).

1. Davidovich Yu. S., Gertman L. N. Ocenka izmeneniya vodnoj poverxnosti Zel`vyanskogo vodoxranilishha po danny`m distancionnogo zondirovaniya Zemli [Assessment of changes in the water surface of the Zelvyanskoye Reservoir based on remote sensing data]. Sovremenny`e problemy` landshaftovedeniya i geoe`kologii : materialy` VII Mezhdunar. nauch. konf., posvyashh. 90-letiyu kaf. geogr. e`kologii Belorus. gos. un-ta, Minsk, 11–15 noyab. 2024 g. [Modern problems of landscape science and geoecology : Proc. of the VII Intern. scientific conference dedicated to the 90^th anniversary of the Department of Geogr. Ecology of the Belarusian State University, Minsk, 11–15 November 2024.]. Minsk, 2024, pp. 93–96. (in Russian)

2. Topaz A. A., Davidovich Yu. S. Radiometricheskaya i atmosfernaya korrekciya kosmicheskix snimkov v programmnom komplekse ENVI : ucheb.-metod. rekomendacii po kursu «Cifrovaya obrabotka kosmicheskix snimkov» dlya studentov special`nostej 1-31 02 03 «Kosmoae`rokartografiya», 1-56 02 02 «Geoinformacionny`e sistemy` (po napravleniyam)» [Radiometric and atmospheric correction of space images in the ENVI software package: training and methodological recommendations for the course "Digital processing of space images" for students of specialties 1-31 02 03 "Space and aeronautical cartography", 1-56 02 02 "Geoinformation systems (by direction)"]. Minsk, BSU Publ., 2022, 28 p. (in Russian)

3. Lurye I. K. Geoinformacionnoe kartografirovanie. Metody` geoinformatiki i cifrovoj obrabotki kosmicheskix snimkov : uchebnik [Geoinformation mapping. Methods of geoinformatics and digital processing of space images : textbook]. Moscow, KDU Publ., 2010, 424 p. (in Russian)

4. EcoNiP 17.06.01-006-2023. Oxrana okruzhayushhej sredy` i prirodopol`zovanie. Gidrosfera. Normativy` kachestva vody` poverxnostny`x vodny`x ob``ektov [EcoNiP 17.06.01-006-2023. Environmental protection and Nature Management. Hydrosphere. Water quality standards for surface water bodies]. Minsk, Ministry of Natural Resources and Environmental Protection of the Republic of Belarus, 2023, 21 p. (in Russian)

5. Kovalevskaya R. Z., Zhukava H. A., Adamovich B. V. Modification of the method of spectrophotometric determination of chlorophyll a in the suspended matter of water bodies. Journal of Applied Spectroscopy, 2020, vol. 87, no 1, pp. 72–78. DOI: 10.1007/s10812-020-00965-9.

6. Lurye Yu. Yu. Unificirovanny`e metody` analiza vod [Unified methods of water analysis]. Moscow, Chemistry Publ., 1973, 376 p. (in Russian)

7. Kishkinova T. S., Kaplin V. T., Stradomskaya A. G. Rukovodstvo po ximicheskomu analizu poverxnostny`x vod sushi [Manual of chemical analysis of terrestrial surface waters]. Leningrad, Gidrometeoizdat, 1977, 541 p. (in Russian)

8. Wetzel R.G., Likens G. E. Limnological analysis. New York, Springer-Verlag Publ., 2000, 429 p.

9. Miheeva T. M. Metody` kolichestvennogo ucheta nanofitoplanktona (obzor) [Methods for quantitative accounting of nanophytoplankton (review)]. Gidrobiologicheskij zhurnal = Hydrobiological Journal, 1989, vol. 25, no. 4, pp. 3–21. (in Russian)

10. Miheeva T. M. Al`goflora Belarusi. Taksonomicheskij katalog [Algal flora of Belarus. Taxonomic catalog]. Minsk, BSU Publ., 1999, 396 p. (in Russian)

11. Hillebrand H., Dürselen C.-D., Kirschtel D., Pollingher U., Zohary T. Biovolume calculation for pelagic and benthic microalgae. Journal of Phycology, 1999, no. 35, pp. 403–424. DOI: 10.1046/j.1529-8817.1999.3520403.x.

12. Jungblut A.-D., Neilan A. B. Molecular identification and evolution of the cyclic peptide hepatotoxins, microcystin and nodularin, synthetase genes in three orders of cyanobacteria. Archives of Microbiology, 2006, no. 185, pp. 107–114. DOI: 10.1007/s00203-005-0073-5.

13. Belykh O. I., Sorokovikova E. G., Fedorova G. A., Kaluzhnaya O. V., Korneva E. S., Sakirko M. V., Sherbakova T. A. Presence and genetic diversity of microcystin-producing cyanobacteria (Anabaena and Microcystis) in Lake Kotokel (Russia, Lake Baikal Region). Hydrobiologia, 2011, no. 671, pp. 241–252. DOI: 10.1007/s10750-011-0724-2.

14. Adamovich B., Mikheeva T., Sorokovikova E., Belykh O., Paškauskas R., Kuzmin A., Fedorova G., Zhukava H., Karosienė J. Phytoplankton of the transboundary River Viliya (Neris): community structure and toxic cyanobacte rial blooms. Baltica, 2021, vol. 34, no. 2, pp. 174–184. DOI: 10.5200/baltica.2021.2.4.

15. Carlson R. E. A trophic state index for lakes. Limnol. Oceanog., 1977, vol. 11, pp. 361–369. DOI: 10.4319/lo.1977.22.2.0361.

16. Adamovich B. V., Zhukova T. V., Mikheeva T. M., Kovalevskaya R. Z., Luk’yanova E. V. Long-term variations of the trophic state index in the Narochanskie Lakes and its relation with the major hydroecological parameters. Water Resources, 2016., vol. 43, no. 5., pp. 809–817. DOI: 10.1134/S009780781605002X.

17. EkoNiP 17.06.08-003-2022. Trebovaniya po soderzhaniyu poverxnostny`x vodny`x ob``ektov v nadlezhashhem sostoyanii i ix blagoustrojstvu [EcoNiP 17.06.08-003-2022. Requirements for the maintenance of surface water bodies in proper condition and their improvement]. Minsk, Ministry of Natural Resources and Environmental Protection of the Republic of Belarus, 2022, 40 p. (in Russian)

18. Quinlan R., Filazzola A., Mahdiyan O., Shuvo A., Blagrave K., Ewins C., Moslenko L., Gray D. K., O’Reilly C. M., Sharma S. Relationships of total phosphorus and chlorophyll in lakes worldwide. Limnol. Oceanog., 2021, no. 66, pp. 392–404. DOI: 10.1002/lno.11611.

19. Meriluoto J., Spoof L., Codd G. A. Handbook on cyanobacterial monitoring and cyanotoxin analysis. New York, Wiley Publ., 2017, 576 p.

20. EcoNiP 17.01.06-001-2017. Oxrana okruzhayushhej sredy` i prirodopol`zovanie. Trebovaniya e`kologicheskoj bezopasnosti [EcoNiP 17.01.06-001-2017. 27. Environmental Protection and Nature Management. Environmental Safety Requirements]. Minsk, Ministry of Natural Resources and Environmental Protection of the Republic of Belarus, 2017, 185 p. (in Russian)