Hydroecological Problems of Dairy Estuary in Connection with the Instable of its Communication with the Azov Sea

doi:10.26565/1992-4259-2019-21-02

V. P. Vorovka Bohdan Khmelnytsky Melitopol State Pedagogical University, Hetmanska St, 20, Melitopol, 72300, Ukraine https://orcid.org/0000-0001-7658-5939
V. O. Demchenko Institute of Marine Biology , Pushkinska St. 37, Odessa, 65011 Ukraine https://orcid.org/0000-0003-0225-3207

DOI: https://doi.org/10.26565/1992-4259-2019-21-02

Keywords: connecting channel, hydrological problem, wetland, hydrological reserve

Abstract

Purpose. To identify the existing hydrological problems of the connecting channel between the Milky Liman and the Sea of Azov, due to insufficient morphometric performance of the channel.

Methods. The analysis of hydroecological changes in the Dairy Way is the creation of a bulk model of the water body. Given the lack of a depth map, field mapping of the bottom of the studied reservoir was carried out. In order to calculate the volume of the water body of the Dairy estuary in 2012, eight transects were laid on which depth measurements were carried out through each 200 m measuring track. Measurement points were recorded using GPS. On the basis of the obtained data using the 3D Analyst module, a digital bottom relief model was constructed. His made it possible to calculate the volume of water in the estuary. Retrospective data of water volumes were calculated on the basis of measurements of the maximum depth of the estuary, obtained by the authors by way of measurements in certain years. To calculate the elements of water balance, the data of O. Dyakov was used.The transverse profile of the connecting channel is obtained as a result of field depth measurements in transects. The velocity of the flow in the channel and its throughput were determined according to the standard methods adopted in the hydrology, taking into account the direction and force of the offensive phenomena.

Results. The hydrological and hydrochemical problems of the Dairy Estuary as the key territory of the Azov National Natural Park, a hydrological reserve of national importance and a wetland of international importance are analyzed. Their direct dependence on the unstable functioning of the connecting channel between the estuary and the Sea of Azov has been revealed. A historical cut of the features of the functioning of the ravine channel is shown. A digital 3D model of the estuary bottom has been built and the changes in the water level during different time periods are shown. A spatio-temporal analysis of the dependence of hydrological and hydrochemical indicators of the estuary on the channel functioning state has been made. It is revealed that the existing parameters of the connecting channel do not ensure the full functioning of the Molochny Liman and the fulfillment of ecological functions by it. Environmental changes that occur as a result of unstable and periodic connection of the estuary to the sea through the channel are analyzed: changes in water salinity, species diversity of invertebrates, fish and birds, areas of shallow water areas as feeding places for riparian birds, changes in the biological productivity of the estuary water area. Scientific novelty: On the basis of morphometric measurements of the connecting channel and the waters of the Milky Way, we have attempted to calculate the water supply capabilities of the estuary through the connecting channel and its functioning as a hydrological object.

Conclusion: The adequate width and depth of the connecting channel and the regular connection of the Dairy estuary with the sea will lead to the restoration of hydrological and hydrochemical regimes to the ecologically optimal parameters. On the basis of this biological diversity in the estuary will be restored, its socio-economic and ecosystem functions will be renewed.

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Author Biographies

V. P. Vorovka, Bohdan Khmelnytsky Melitopol State Pedagogical University, Hetmanska St, 20, Melitopol, 72300, Ukraine

DSc (Geography), Associate Professor, Head of Ecological Safety and Rational Nature Use Department

V. O. Demchenko, Institute of Marine Biology , Pushkinska St. 37, Odessa, 65011 Ukraine

DSc (Biology), Senior Researcher, Head of the Interdepartmental Laboratory for Monitoring the Azov Basin Ecosystems

References

Antonovsky, O.G., Demchenko, V.O., Mityai, I.S. (2010). Milk estuary: a retrospective and prospects of ecological status. Scientific notes of the Ternopil National Pedagogical University named after Volodymyr Hnatyuk. Series: Biology. Special issue "Hydroecology", (3 (44)), 13 - 17. (In Ukrainian).

Vinokurova, S. V., Demchenko, V. A., Chernichko, I. I., Vorovka, V. P.(2013). Use of remote sensing data in combination with ground surveys to assess the ecological state of Milk Estuary (north-western Azov re-gion). Earth from space - the most effective solutions, VI international Conf., 2013. Moskow, 96-105. (In Russian).

Vishnevsky, V. I., Vorovka, V. P.(2010). Ukrainian Aral. Ukrayina moloda, 2010. November 11, 2010. (In Ukrainian).

Vorovka, V. P., Demchenko, V. A. (2010).Geographic analysis of the factors of the modern eco-state of the Dairy lima-well. Ukrainian geographic journal, ( 3), 43-47. (In Ukrainian).

Vorovka, V. P., Demchenko, V. A., Vinokurova, S. V. (2015).Dynamics of hydrological parameters of the Dairy estuary as a hydrological reserve of national importance. Hydrology, hydrochemistry and hydroecol-ogy, 1 (36), 46-56.6.

Demchenko, V. A. (2001). Management of the Dairy estuary with the goal of preserving its biological di-versity. Social and economic problems of nature and ecology: environmental materials. science.-practical. conf. Mikolaev, 456-461. (In Ukrainian).

Demchenko, V.O., Yevtushenko, M.Iu., Vorovka, V.P. (2014). The state of the Dairy Estuary as a result of its connection with the Sea of Azov in 2014. Contemporary Problems of Theoretical and Practical Ichthy-ology: VIІth Intern. ichthyologist. scientific-practical Conf., Melitopol-Berdyansk, 69-72 (In Ukrainian).

Demchenko, V. O., Chernichko, R. M., Chernichko, J. I., Dyadicheva, O. A., Koshelev, O. I., Demchenko, N. A. (2012). The current state of the Dairy Estuary as wetlands of international importance. Zapovidna sprava v Ukraini, 18 (1-2), 114-119. (In Ukrainian).

Demchenko, V. A., Mityai, I. S., Antonovsky, A. G., Zabroda, S. M. The current state of the Dairy Estuary hydrological reserve due to its isolation from the Sea of Azov. The role of nature reserves in biodiversity conservation: proceedings of a scientific conference dedicated to the 80th anniversary of the Kaniv Nature Reserve, Kaniv, 2003. 53-54. (In Ukrainian).

Ilyin, Yu. P. Fomin, V. V., Dyakov, N. N., Gorbach, S. B. (2009). Hydrometeorological conditions of the seas of Ukraine. Vol. 1. Sea of Azov. Sevastopol. [in Russian].

Management plan Dairy estuary. (2005). 1-67. (In Ukrainian).

Mityay, I. S., Demchenko, V. A., Zabroda, S. M., Trubnikova, A. P., Brovchenko, N. T. (2000). Current ecological state of the Dairy estuary. Geographical Problems of the Development of the South of Ukraine in the 21st Century, Odessa-Melitopol, 33-38 (In Ukrainian).

Development of a working project for the construction of hydraulic structures to provide a hydrological regime in the reserve of the national value " Dairy estuary" in the Zaporozhye region.(2001). Kyiv. (In Ukrainian).

Chesalin, M.V., Zuev, G.V., Mityai, J.S., Demchenko, V.A. (2002).Modern state and problems of preserving the ecosystem of the Dairy estuary of the Azov Sea. Rybne hospodarstvo Ukrainy, 1 (18), 5-9 (in Russian).

Yankovsky, B. A.(1965). About fishery use of the Dairy estuary. News of the Melitopol Division of the Ge-ographical Society of the Ukrainian SSR and Zaporizhzhya Regional Branch of the Society for the Conservation of Nature of the Ukrainian SSR. Dnepropetrovsk: Promin. 67-80. [in Russian].

Yarovy, S.O., Dyadicheva, O.A., Demchenko, V.A., Antonovsky, O.G. (2014). Wetlands of Interna-tional Importance " Dairy Estuary". VBU monitoring of international importance. Methods and results: materials of the seminar "Organization and results of monitoring of the Security Service of Ukraine in Ukraine", Odessa, 126-134. (In Ukrainian).

Demchenko V., Vinokurova S., Chernichko J., Vorovka V. (2015). Hydrological regime of Molochnyi li-man under anthropogenic and natural drivers as a basis for management decision-making. Environmental Science & Policy, 46, 37-47.