Geoecological effects of the outflow of 11-T Gunyushki geothermal well in the territory of the Chechen Republic

The purpose of the study is a geoecological assessment of the effect of groundwater flowing from geothermal wells through an energetically saturated coolant with its mineral component on natural and natural-economic components as well as on the structure of the entire enclosing landscape for the case of 11-T Gunyushki well of the Chechen Republic (Russia). The impact of the mineralized waters outflowing from geothermal wells on natural and natural-economic components and on the whole structure of the entire enclosing landscape is a challenging environmental problem for all oil and gas regions of Russia. Long-term outflow of thermal water from the well under consideration resulted in landscape trans-formation and suppression of the vegetation cover. Moreover, a stable source of pollution was formed in the place where untreated water from hand-crafted balneological facilities (baths, showers) was discharged that caused a radical restructuring of plant communities. The conducted research is based on the field data obtained by a team of authors on landscape mapping. Interpretation of high-resolution satellite images has shown the dynamics of landscape changes under the influence of thermal waters. The authors took water and soil samples and questioned local residents, which made it possible to adjust the scale and possibilities of using these waters. The research performed allowed to develop a physical-geographical profile, create a landscape map of the area affected by a geothermal well and an index map of the geoecological zoning of the area under investigation as well as identify the main types of the most transformed landscapes resulting from the combined impact of several anthropogenic factors (humidification and impact on the soil and vegetation cover). Conducted study has shown that more than 120 hectares of fertile lands were withdrawn from agriculture due to the anthropo-genic impact. The analysis of the index map of geoecological zoning demonstrates that 79 % of the territory is located in the zone of a weak indirect environmental impact, 7.14 % – in the zone of a strong indirect environmental impact, 13.5 % – in the zone of a strong direct environmental impact. The latter, requires reclamation in order to restore landscapes, since it undergoes desertification. Having performed a number of chemical analyses of water, the authors gave recommendations for the further use of thermal waters in the economy of the Groznensky region. 

1. Dvorov I. M. Geothermal energy. Moscow: Nauka; 1976. 192 p. (In Russ.).

2. Belousov V. I., Belousova S. P. Natural disasters and environmental risks (for the case of geothermal energydevelopment). Petropavlovsk-Kamchatsky: Kamchatka State Pedagogical University; 2002. 157 p. (In Russ.).

3. Alkhasov A. B. Geothermal energy: problems, resources, technologies. Moscow: Fizmatlit; 2008. 375 p. (In Russ.).

4. Perminov E. M. On the state and prospects of development world renewable energy. Energetik. 2018;11:38-43. (In Russ.).

5. Sukharev G. M., Miroshnikov M. V. Underground waters of the Caucasus oil and gas fields. Moscow: Gostoptekhizdat; 1963. 328 p. (In Russ.).

6. Kurbanov M. K. Geothermal and hydromineral resources of the Eastern Caucasus and Ciscaucasia. Moscow: Nauka – MAIK; 2001. 259 p. (In Russ.).

7. Kerimov I. A., Daukaev A. A., Abumuslimov A. A., Daukaev A. A. On the history of mineral and healing water studies on the territory of the Chechen Republic. Vestnik Akademii nauk Chechenskoi Respubliki. 2012;1:59-64. (In Russ.).

8. Hou H. Environmental impact of geothermal development in Henan province, Chinaю. Geothermal Training Programme. 2003;11:253-274.

9. Li J. Environmental impact of geothermal development in Tianjin, China. Geothermal Training Programme. 2004;9:159-182.

10. Svalova V. B. Geothermal resources of Russia and their complex utilization. Proceedings of Australian Geothermal Energy Conference 2011. Melbourne; 2011, p. 251–258.

11. Bayer P., Rybach L., Blum P., Brauchler R. Review on life cycle environmental effects of geothermal power generation. Renewable and Sustainable Energy Reviews. 2013;26:446-463. https://doi.org/10.1016/j.rser.2013.05.039.

12. Bošnjaković M., Stojkov M., Jurjević M. Environmental Impact of Geothermal Power Plants. Tehnički vjesnik = Technical gazette. 2019;26(5):1515-1522. https://doi.org/10.17559/TV-20180829122640.

13. Shulyupin A. N., Varlamova N. N. Current trends in the development of geothermal resources. Georesursy = Georesources. 2020;22(4):113-122. https://doi.org/10.18599/grs.2020.4.113-122.

14. Gatsaeva L. S. Geoecological problems of geothermal resources development in the Chechen Republic. Groznenskii estestvennonauchnyi byulleten' = Grozny Natural Science Bulletin. 2017;3:17-21. (In Russ.).

15. Dikaev R. S., Batukaev A. A., Masarov I. R. Geothermal deposits of the Chechen Republic. Current state. In: Peredovye nauchnye issledovaniya: opyt i aktual'nye voprosy: sb. dokl. Mezhdunar. nauch.-prakt. konf. = Advanced scientific studies: experience and challenging issues: collection of reports of the International scientific and practical conference. Saint Petersburg; 2019, p. 25–38. (In Russ.).

16. Gatsaeva L. S., Gunya A. N., Kerimov I. A. Geoecological impact assessment geothermal wells on landscape (by the example of the Gunyushki deposit of the Chechen Republic. Groznenskii estestvennonauchnyi byulleten' = Grozny Natural Science Bulletin. 2022;7(2): 18-31. https://doi.org/10.25744/genb.2022.94.48.003.

17. Gatsaeva L. S., Kerimov I. A., Makhmudova L. Sh. Geoecological problems of Gunyushki thermal water deposit. Izvestiya Dagestanskogo gosudarstvennogo pedagogicheskogo universiteta. Estestvennye i tochnye nauki = Dagestan State Pedagogical University Journal. Natural and Exact Sciences. 2021;15(2):63-74. (In Russ.). https://doi.org/10.31161/1995-0675-2021-15-2-63-74.

18. Gatsaeva L. S. Geochemical analys of thermal water quality (on the example of the Gunyushka thermal water deposit). Vestnik Kompleksnogo nauchno-issledovatel'skogo instituta im. Kh. I. Ibragimova Rossiiskoi akademii nauk. 2021;4:84-96. (In Russ.). https://doi.org/10.34824/VKNIIRAN.2021.8.4.008.

19. Kerimov I. A., Mintsaev M. Sh., Debiev M. V., Pashaev M. Ya. Basic stages of energy development program implementation in the Chechen Republic. International Journal of Energy Economics and Policy. 2020;10(6):502-509. https://doi.org/10.32479/ijeep.10492.

20. Ginzburg A. S., Kekelidze G. N., Shnipko N. V. Climatic resources – the basis for sustainable development of renewable energetics. Groznenskii estestvennonauchnyi byulleten' = Grozny Natural Science Bulletin. 2018;3(2):7-15. (In Russ.). https://doi.org/10.25744/genb.2018.10.2.001.

21. Kochurov B. I., Zaburaeva Kh. Sh., Kerimov I. A., Eldarov E. M., Gayrabekov U. T., Ivashkina I. V., et al. Modern problems of environmental management in the North Caucasus and the way of their decision. Groznenskii estestvennonauchnyi byulleten' = Grozny Natural Science Bulletin. 2018;3(3):29-35. (In Russ.). https://doi.org/10.25744/genb.2018.11.3.004.