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Title: ECOLOGICAL STATE ASSESSMENT OF THE DANUBE DELTA
ECOLOGICAL STATE ASSESSMENT OF THE DANUBE DELTA

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Laura Dutu; Dumitru Grosu; Florin Dutu; Irina Catianis
10.5593/sgem2022/5.1/s20.016
10.5593/sgem2022/5.1
1314-2704
978-619-7603-46-0
English
22
5.1
•    Prof. DSc. Oleksandr Trofymchuk, UKRAINE 
•    Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Ecology and Environmental Protection
The paper presents the results of the water quality of the St. George branch, one of three Danube River distributaries, using the combined physical and chemical analyses from June 2017. Three cutoff meander reaches (the Mahmudia, Upper Dunavat and Lower Dunavat meanders) were selected to assess the water ecological state. The cut-offs of the meanders by navigational canals since 1984–1988 caused significant changes in the distribution of the water discharge. Water samples were acquired throughout several cross-sections of both natural and artificial canals of the three rectified meanders, in order to investigate the physical and chemical characteristics of the water. The analyse of the physical and chemical parameters, such as water temperature, conductivity, pH, dissolved oxygen, degree of mineralization, nitrates, nitrites, phosphates, suspended sediments, sulphate, chlorophyll “a”, hydrogen sulfide, etc., has shown the predominance of the good ecological state of the water for nitrites and nitrates and lowquality state for phosphates. The water quality assessment was made according to Order 161/2006 [1]. The conclusions regarding the ecological state of the study area could be drawn by observing the water quality variations as conditioned by the position of the sampling points and distance to the main channel.
[1] Order 161/2006 of Ministry of Environment and Water Management – Ecological status of water bodies.
[2] Radan S., Strechie C., Ganciu A., Ruzsa G., Radan S.C, Radan m., EROS-2000 Danube Programme : State of ecosystems within the Danube Delta in 1995, Geo-EcoMarina, Romania, vol. 2, pp. 163-177, 1995;
[3] Iticescu C., Georgescu L.P, Topa, C.M, Assessing the Danube water Quality Index in the city of Galati, Romania, Carpathian Journal of Earth and Environmental Sciences, Romania, vol. 8/issue 4, pp. 155-164, 2013;
[4] Radu V.M., Ivanov A.A., Ionescu P., Gyorgy D., Diacu E., Overall Assessment of water quality on Lower Danube River using multi-parametric Quality Index, Revista de Chimie, Romania, vol. 67/issue 3, pp. 391-395, 2017;
[5] Catianis I., Tiron Dutu L., Grosu D., Heavy metals occurrence in lakes of the Danube Delta, Romania, Geo-Eco-Marina, Romania, vol. 28, pp. 1-15, 2022;
[6] Vadineanu A., Lower Danube Wetlands System (LDWS). Observatorio Medioambiental, Spain, vol. 4, pp. 373-402, 2001.
[7] Panin N., The Danube Delta. Geomorphology and Holocene evolution: a Synthesis. Geomorphologie: relief, processus, environnement, France, vol. 4, pp. 247-262, 2003;
[8] Mikhailov V.N., Mikhailova M.V., Impact of local water management and hydraulic-engineering projects on River deltas, Water resources, USA, vol. 42/issue 3, pp. 275-284, 2015.
The research was supported by the Ministry of Research, Innovation and Digitization Core Program, Projects PN16450503 (Contract no. 37N/2016) and PN19200401 (Contract no. 13N/08.02.2019) and Project AMBIACVA (Contract 23PFE/30.12.2021).
conference
https://doi.org/10.5593/sgem2022/5.1/s20.016
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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.
119-126
04 - 10 July, 2022
website
8680
meander, Danube Delta, water quality, suspended sediments, human impact