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Title: TECHNOLOGICAL APPROACH FOR WATER RESOURCES DETERMINATION IN ISKAR RIVER WATER BODIES
TECHNOLOGICAL APPROACH FOR WATER RESOURCES DETERMINATION IN ISKAR RIVER WATER BODIES

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Plamen Ninov; Elena Bojilova
10.5593/sgem2022/3.1/s12.23
10.5593/sgem2022/3.1
1314-2704
978-619-7603-42-2
English
22
3.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Hydrology and Water Resources
The main goal of presented study is a demonstration of technological approach to determine the water resources of surface water bodies, using a sparse hydrological monitoring network not covering many of them. Resource of the water body is a flow formed in the catchment area above the studied one including the additional inflow in the frame of the same water body. Practically the flow is changing in each sector of the water body but average annual resources are specified at the final section. The water resources for the river water bodies are determined using information from the monitoring network of the National Institute of Meteorology and Hydrology, Bulgarian Academy of Sciences (NIMH) for the Iskar River. The investigation is preceded by hydrological analysis of the information: the referent period, homogenous and suitable data set selection for statistical procedures reflecting the actual conditions in the surface water.
The transfer of information from observed river stretches to non-observed ones requires a special hydrological investigation and methodological decision. In the world practice there are two main methodological approaches for flow determination in the nonobserved river stretches - regionalization of characteristic flows depending on catchment characteristics and a balance method. The balance method requires a very big amount of information linked to the various water consumptions as: water supply, irrigation, power engineering, reservoir management and water accumulation very often missing or not reliable. That is the reason for the acceptance of regionalization of characteristic flows as a suitable approach for Bulgarian conditions based on the real and reliable measured data from the monitoring network in NIMH. In the case of water accumulation after dams, where practically the flow is interrupted, the water resource determination can be based only on the information from reservoir management authorities (if this information exists).
Iskar River has a biggest watershed in the Danube catchment area in Bulgaria, where the capital Sofia is located, with important economic significance and big anthropogenic impacts on the flow regime. In the study is used a GIS information for the water bodies delineation presented by the Ministry of Environment and Water.
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[3] Zhang, Y., Chiew, F.H.S., Relative merits of different methods for runoff predictions in ungauged catchments. Water Resour. Res., 45(7): W07412, doi: 10.1029/2008wr007504, China, 2009.
[4] Viglione, A., Parajka, J., Rogger, M., Salinas, J. L., Laaha, G., Sivapalan, M., and Bl?oschl, G.: Sivapalan, M., and Bloschl, G., Comparative assessment of predictions in ungauged basins – Part 3: Runoff signatures in Austria, Hydrol. Earth Syst. Sci. Discuss., 10 449–485, doi:10.5194/hessd-10-449-2013, Austria, 2013.
conference
https://doi.org/10.5593/sgem2022/3.1/s12.23
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Proceedings of 22nd International Multidisciplinary Scientific GeoConference SGEM 2022
22nd International Multidisciplinary Scientific GeoConference SGEM 2022, 04 - 10 July, 2022
Proceedings Paper
STEF92 Technology
International Multidisciplinary Scientific GeoConference SGEM
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci and Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts and Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci and Arts; Acad Sci Moldova; Montenegrin Acad Sci and Arts; Georgian Acad Sci; Acad Fine Arts and Design Bratislava; Turkish Acad Sci.
185-192
04 - 10 July, 2022
website
8542
hydrology, water resources, regionalization