Algae blooming in the Kamianske Reservoir
Abstract
According to observation data obtained at the drinking water intake in the Kamyanske reservoir in the village of Auly, the basic patterns of water blooming were specified. Water abstraction in here is performed from the depth of 8-9 m, which roughly corresponds to a mid-point of the maximum depths. It was determined that the number of algae per unit volume is very large - significantly higher than at the water intake of the Dnieper Water Supply Station (DWSS), which is located in the downstream of the Kyivska HPP. In some cases, it may exceed 1000 million in 1 dm3. During the study period, a decrease in algae amount was recorded, mainly, starting from 2018. The largest algae amount per a volume unit is usually observed in September, i.e. later than in the surface layer of water. The largest algae amount was recorded in September of 2010 and 2014.
The factors that contributed to the development of algae at this time are given. Such factors were primarily high air and water temperatures, as well as low cloud cover. There is some delay in changing weather conditions. From June to November, blue-green algae are dominant in the water intake in the village of Auly, the share of which in August-October reaches 95-99%. From December to April, diatomic algae are dominant. The share of green algae is the highest in summer, but it does not usually exceed 2-3% of the total. The significant development of algae in the Kamyanske Reservoir is confirmed by remote sensing data. According to satellite data, it was found out that in this reservoir the largest blooming is observed in the place of water intake location. The dependence of water blooming on hydrometeorological conditions, in particular the direction of wind currents is also shown. The dominance of the northeast wind over the Kamyanske Reservoir in the summer causes a wind setup to the water intake, which results in the increase in the number of algae cells per volume unit.
References
2. Vyshnevskyi, V.I. (2019). Prostorovo-chasova minlyvist “tsvitinnia” vody u dniprovskykh vodoskhovyshchakh [Spatio-temporal variability of algal bloom in the Dnipro Reservoirs]. Ukrainskyi zhurnal dystantsiinoho zonduvannia Zemli [Ukrainian Journal of Remote Sensing], 20, 18–27. [in Ukrainian].
3. Vyshnevskyi, V.I., & Lopata L.M. (2016). “Tsvitinnia” vody na vodozabori dniprovskoi vodoprovidnoi stantsii [Algal bloom on the water intake of the Dnipro Water Treatment Station]. Melioratcia i vodne hospodarstvo [Land reclamation and water management], 104, 31–35. [in Ukrainian].
4. Vyshnevskyi, V.I., & Shevchuk, S.A. (2018). Vykorystannia danykh suputnykiv Aqua i Terra u doslidzhenniakh “tsvitinnia” vody dniprovskykh vodoskhovyshch [The use of Aqua and Terra satellites in study of algal bloom of the Dnipro Reservoirs]. Pratsi Tsentralnoi heofizychnoi observatorii [Proceedings of the Central Geophysical Observatory], 14 (28), 44–49. [in Ukrainian].
5. Vyshnevskyi, V.I., & Shevchuk, S.A. (2018). Vykorystannia danykh dystantsiinoho zonduvannia Zemli u doslidzhenniakh vodnykh obiektiv Ukrainy [Use of remote sensing data in study of water bodies of Ukraine]. Kyiv: Interpress LTD. [in Ukrainian].
6. Zadorozhna, G.M. (2016). Osoblivosti rozvytku fitoplanktonu verkhnioi chazstyny Kanivskoho vodokhranilishcha v lotychnykh i leptychnykh umovakh [Features of the phytoplankton growth in the upper part of the Kanivske Reservoir in the lake and river conditions]. Thesis of diss. for the scient. level of cand. of biological sciecies. Kyiv: Institute of Hydrobiology, NASU. [in Ukrainian].
7. Zadorozhna, G.M., & Shcherbak, V.I. (2016). Vplyv soniachnoi radiatsii na rozvytok fitoplanktonu Kanivskoho vodokhranilishcha [The impact of solar radiation and water temperature on the growth of phytoplankton in Kanivske reservoir]. Hidrobiol. Zhurnal [Hydrobiol. Journal], 5 (52), 18–27. [in Ukrainian].
8. Kyrpenko, N.I., Krot, J.H., & Usenko, O.M. (2018). Tsveteniie poverkhnevukh vod – fundametnalnye i prikladnye aspekty [Algal bloom – fundamental and applied aspects]. Hidrobiol. Zhurnal [Hydrobiol. Journal], 6 (54), 18–34. [in Russian].
9. Pryimachenko, A.D. (1981). Fitoplankton i pervichnaia produktsia Dnepra i Dneprovskikh vodokhranilishch [Phytoplankton and primary production of the Dnipro River and Dnipro Reservoirsies]. Kiev: Nauk. Dumka. [in Russian].
10. Sirenko, L.A., Koreliakova, I.L., & Mikhailenko, L.E. et al (1989). Rastitelnost i bakterialnoe naselenie Dnepra i Dneprovskikh vodokhranilishch [Vegetation and bacterial population of the Dnipro River and its reservoirs]. Kiev: Nauk. Dumka. [in Russian].
11. Shcherbak, V.I., Zadorozhna, G.M., & Kolesnichenko K.P. (2014) Prostranstvenno-vremennaia dinamika fitoplanktona pridatochnoi seti kievskogo uchastka Kanevskogo vodohranilishcha [Spatio-temporal dynamics of phytoplankton of the accessory network of the Kyiv section of the Kanivske reservoir]. Hidrobiol. Zhurnal [Hydrobiol. Journal], 1 (50), 3–14. [in Russian].
12. Paerl, H.W., Fulton, R.S., Moisander, P.M., & Dyble, J. (2001). Harmful freshwater algal blooms, with an emphasis on cianobacteria. The Scientific World, 1, 76–113.
13. Urquhart, E.A., Schaeffer, B.A., & Stumpf, R.P. et al (2017). A method for examining temporal changes in cyanobacterial harmful algal bloom spatial extent using satellite remote sensing. Harmful algae, 67, 144–152.
