GREBIN V.V., GOPCHAK I.V., GOPTSIY M.V., POLYAKOV M.G. WATER MANAGEMENT BALANCE OF THE ROS RIVER BASIN: OPTIMIZATION PROBLEMS AND WATER USE CONDITIONS DURING LOW WATER PERIODS
DOI: https://doi.org/10.17721/2306-5680.2025.1.3
Hydrology, Hydrochemistry and Hydroecology. 2025. № 1(75)
Publication language: Ukrainian
Authors:
Grebin V.V., Taras Shevchenko National University of Kyiv
Gopchak I.V., State Agency of Water Resources of Ukraine, Kyiv
Goptsiy M.V., Taras Shevchenko National University of Kyiv
Polyakov M.G. Regional Office of Water Resources of the Ros River, Bila Tserkva
The main components of the water balances for the Ros River basin as a whole, its water management areas (WMAs), and individual sub-basins were analyzed. This included determining the volumes of surface runoff from the main river and lateral tributaries, groundwater withdrawal, and return water. Calculations were also performed for water losses due to increased evaporation from water bodies and filtration from them. Furthermore, water use volumes and minimum ecological flow requirements within each WMA and sub-basin were quantified.
The developed water management balances allowed for an assessment of water resource availability and usability within the basin, considering their quantity and development level under various hydrological conditions. To perform a detailed water management balance, observation series from 4 hydrological stations of the Ukrainian Hydrometeorological Center’s stationary network were utilized. Additionally, data from 7 hydrological stations of the Regional Office of Water Resources of the Ros River (ROWR of the Ros River) were used, referred to gauges located at the mouths of the main tributaries of the Ros River and at the Kosiv Reservoir Dam.
Since the hydrological observation series from the ROWR of the Ros River were rather short, a procedure was undertaken to extend the statistical parameters of the average monthly and annual water flows to a multi-year period using analog rivers. The established correlation relationships facilitated the restoration of observation series for the Ros River Regional Water Resources Monitoring Center’s hydrological cross-sections, allowing for the construction of flow duration curves and the identification of years with exceedance probabilities close to 50%, 75%, and 95%.
Results from the developed water management balances indicate that in years of average flow (50% exceedance probability), the water resource deficit period will last from 2 to 6 months for 50% of the analyzed sections. In low-flow years (75% exceedance probability), this applies to 75% of the sections, with a deficit duration of 2 to 10 months. During severe low-flow years (95% exceedance probability), a water resource deficit will be experienced throughout the year for 4 studied sections, while for others, the deficit period will range from 2 to 8 months.
These findings are valuable for optimizing the water resources management process. Calculating the water management balance of the Ros River basin (with details for individual WMAs and selected sub-basins) for specified exceedance probabilities (50%, 75%, and 95%) on a monthly basis, considering current water use levels, will enhance the information resources of the State Water Agency of Ukraine and the Regional Office of Water Resources of the Ros River. This will ultimately contribute to saving specialists’ working time when making decisions on issuing special water use permits, regulating water consumption and discharge, and assessing water quality indicators.
Keywords: Ros River, water management balance, deficit, reserve, low water.
References:
1. Babii V.P., Vyshnevskyi V.I., Shevchuk S.A. Richka Ros ta yii vykorystannia [The Ros River and its uses]. Kyiv: «Interpres LTD», 2016. 128 s.
2. Vodnyi kodeks Ukrainy [Water Code of Ukraine]. Vvedenyi v diiu Postanovoiu VR № 214/95-VR vid 06.06.95, VVR, 1995, № 24, st.190. Zi zminamy vnesenymy protiahom 2000-2024 rr. URL: https://zakon.rada.gov.ua/laws/show/213/95-%D0%B2%D1%80#Text
3. Hopchenko Ye.D. Loboda N. S., Ovcharuk V. A. Hidrolohichni rozrakhunky : pidruchnyk [Hydrological calculations: textbook]. Odesa : TES, 2014. 484 s.
4. Hrebin V.V., Hopchak I.V., Hoptsii M.V., Poliakov M.H. Vodohospodarskyi balans baseinu richky Ros: problemy optymizatsii [Water management balance of the Ros River basin: optimization problems]. XIII Mizhnarodna naukovo-praktychna konferentsiia «Voda dlia maibutnoho: upravlinnia, zberezhennia, innovatsii», m. Kyiv 25-26 bereznia 2025 roku. S.32-36.
5. Derzhavnyi oblik vodokorystuvannia v Ukraini [State accounting of water use in Ukraine]. Derzhavne ahentstvo vodnykh resursiv Ukrainy. URL: https://davr. gov.ua/derzhavnij-oblik-vodokoristuvannya
6. Mokin V.B., Hrebin V.V., Kryzhanovskyi Ye.M. Metody otsiniuvannia ta zasoby avtomatyzatsii rozrakhunku skladovykh vodohospodarskoho balansu raioniv richkovykh baseiniv Ukrainy : monohrafiia [Methods of evaluation and means of automating the calculation of components of the water management balance of river basin districts of Ukraine: monograph]. Vinnytsia : VNTU, 2023. 159 s.
7. Nakaz Derzhvodahentstva Ukrainy vid 06 serpnia 2024 r. №103 «Pro zatverdzhennia Planu zakhodiv Derzhavnoho ahentstva vodnykh resursiv Ukrainy z vykonannia Planu dii shchodo kompleksnoho vyrishennia problem baseinu richky Ros na 2024-2030 roky» [Order of the State Water Agency of Ukraine dated August 6, 2024 No. 103 “On approval of the Action Plan of the State Water Resources Agency of Ukraine for the implementation of the Action Plan for the comprehensive solution of the problems of the Ros River Basin for 2024-2030”]. URL: https://rovrrosi.gov.ua/images/user/files/ilovepdf_merged%281%29.pdf
8. Nakaz Ministerstva ekolohii ta pryrodnykh resursiv Ukrainy vid 26.01.2017 № 26 «Pro zatverdzhennia Poriadku rozroblennia vodohospodarskykh balansiv» [Order of the Ministry of Ecology and Natural Resources of Ukraine dated January 26, 2017 No. 26 “On Approval of the Procedure for Developing Water Management Balances”]. URL: https://zakon.rada.gov.ua/laws/show/z0232-17#Text
9. Polozhennia pro poriadok otsinky ta informuvannia pro malovoddia (hidrolohichnu posukhu) na vodnykh obiektakh sushi Ukrainy [Regulations on the procedure for assessing and informing about low water levels (hydrological drought) in water bodies of Ukraine]. Rozrobnyky: V.Boiko, L.Petrenko, I.Perevozchykov. Zatverdzheno ta nadano chynnosti nakazom Ukrhidromettsentra vid 14.12.2020 r. № 123.
10. Rozporiadzhennia Kabinetu ministriv Ukrainy vid 12 lypnia 2024 r. № 648-r «Pro zatverdzhennia planu dii shchodo kompleksnoho vyrishennia problem baseinu richky Ros na 2024-2030 roky» [Order of the Cabinet of Ministers of Ukraine dated July 12, 2024 No. 648-r “On approval of the action plan for a comprehensive solution to the problems of the Ros River basin for 2024-2030.”]. URL: https://zakon.rada.gov.ua/laws/show/648-2024-%D1%80#Text
11. Sait Rehionalnoho ofisu vodnykh resursiv richky Ros Derzhvodahentstva Ukrainy Website of the Regional Office of Water Resources of the Ros River of the State Water Agency of Ukraine]. URL: https://rovrrosi.gov.ua/
12. Grebin V., Mokin V., Kryzhanivskiy Е., Afanasyev S. Optimization of Hydrographic and Water-management Regionalization of Ukraine according to World Approaches and Principles of the EU Water Framework Directive. Hydrobiological Journal, 2016. V 52.i5. P. 81 – 92.
HOW TO CITE
Grebin, V.V., Gopchak, I.V., Goptsiy, M.V., Polyakov, M.G. (2025). Water management balance of the Ros River basin: optimization problems and water use conditions during low water periods. Hidrolohiia, hidrokhimiia i hidroekolohiia [Hydrology, Hydrochemistry and Hydroecology], 1(75), 26-37 (in Ukrainian, abstr. in English). https://doi.org/10.17721/2306-5680.2025.1.3