In this work, on the basis of a landscape map and satellite images from the Landsat satellite, an assessment of the fire-fighting potential of forest geosystems in the territory of the Chikoy-Khilok interfluve (Western Transbaikalia) was carried out. The basis for assessing the fire-fighting potential of forest geosystems was the analysis of the level of water exchange between the components of geosystems, which characterizes the micro- and mesoclimatic features of landscapes. In order to assess the moisture exchange potential of forest geosystems, a joint analysis of index images reflecting the temperature and humidity of the vegetation cover of landscapes was carried out. These images are calculated based on the infrared channels of the Landsat 8 OLI and TIRS satellite images. Forest geosystems with a high potential for moisture exchange have low temperatures of vegetation cover and high fire resistance. The joint analysis of the index images and the landscape map made it possible to carry out an expert assessment of the fire resistance of various types of forest geosystems on a scale of 1 to 5 points. On the territory of the study, the lowest level of fire-fighting potential is distinguished by the geosystems of dry pine and birch-pine forests on plains and foothill heights composed of Quaternary deposits of light texture (sands, sandy loam). Based on the time series of space images of the Landsat, obtained in different years from 1977 to 2020, an analysis of the actual burning of forests has been carried out. This analysis confirmed the high degree of reliability of the assessment of the fire-fighting potential of the forests of the Chikoy-Khilok interfluve area.

Borisova T.A. Lesnye pozhary Buryatii: prichiny i sledstviya [Forest fires in Buryatia: causes and consequences]. Vestnik Voronezhskogo gosudarstvennogo universiteta. Seriya: Geografiya. Geoekologiya [Proceedings of Voronezh State University. Series Geography. Geoecology], 2017, no. 2, pp. 78-84. (in Russian)

Budyko M.I. Globalnaya ekologiya [Global ecology]. Moscow, Mysl Publ., 1977, 327 p. (in Russian)

Vladimirov I.N., Frolov A.A., Kobylkin D.V. Ekologicheskii potentsial geosistem na granitse lesa i stepi (bassein ozera Baikal) [Ecological potential of geosystems on the boundary of forest and steppe (Lake Baikal drainage basin)]. Izvestiya Irkutskogo gosudarstvennogo universiteta. Seriya Nauki o Zemle [The Bulletin of Irkutsk State University. Series Earth Sciences], 2021, vol. 36, pp. 26-44. https://doi.org/10.26516/2073-3402.202136.26 (in Russian)

Evdokimenko M.D. Pirogennaya digressiya svetlokhvoinykh lesov Zabaikaliya [Pyrogenic digression of light coniferous forests of Transbaikalia]. Geografiya i prirodnye resursy [Geography and natural resources], 2008, no. 2, pp. 109-115. (in Russian)

Shkol'nik I.M., Meleshko V.P., Efimov S.V., Stafeeva E.N. Izmeneniya ekstremalnosti klimata na territorii Sibiri k seredine XXI veka: ansamblevyi prognoz po regionalnoi modeli GGO [Changes in the climate extremity in Siberia by the middle of the XXI century: an ensemble forecast based on the regional model of the MGO]. Meteorologiya i gidrologiya [Meteorology and Hydrology], 2012, no. 2, pp. 5-23. (in Russian)

Kas'yanova L.N. Ekologiya rastenii Pribaikaliya (vodnyi obmen) [Plant ecology of the Baikal region (water exchange)]. Moscow, Nauka Publ., 2004, 288 p. (in Russian)

Kobylkin D.V., Vyrkin V.B., Frolov A.A. Razvitie landshaftov peschanykh massivov zapadnoi chasti Malkhanskogo khrebta (Zapadnoe Zabaikalie) [Development of landscapes of sand massifs in the western part of the Malkhansky ridge (Western Transbaikalia)]. Vestnik Buryatskogo gosudarstvennogo universiteta. Biologiya, geografiya[Bulletin of the Buryat State University. Biology, geography], 2019, no. 4, pp. 41-54. https://doi.org/10.18101/2587-7148-2019-4-41-54 (in Russian)

Medvedkov A.A. Podkhody k otsenke protivopozharnoi funktsii lesnykh landshaftov v usloviyakh boreal'noi kriolitozony [Approaches to assessing the fire-fighting function of forest landscapes in the conditions of the boreal permafrost zone]. Analiz, prognoz i upravlenie prirodnymi riskami s uchetom globalnogo izmeneniya klimata (GEORISK-2018) [Analysis, forecast and management of natural risks taking into account global climate change (GEORISK- 2018)], 2018, vol. 2, pp. 209-213. (in Russian)

Medvedkov A.A., Kotova M.V. Protivopozharnyi potentsial lesov vodookhrannoi zony ozera Baikal (na primere territorii Baikalo-Lenskogo zapovednika) [Fire-fighting potential of forests in the water protection zone of Lake Baikal (on the example of the territory of the Baikal-Lensky nature reserve)]. Izvestiya RAN. Seriya geograficheskaya [Izvestiya RAS. Geographic series], 2020, vol. 84, no. 5, pp. 764-775. https://doi.org/10.31857/S2587556620050118 (in Russian)

Ponomarev E.I., Kharuk V.I. Gorimost' lesov Altae-Sayanskogo regiona v usloviyakh nablyudaemykh izmenenii klimata [Fire rate of forests in the Altai-Sayan region under the conditions of observed climate changes]. Sibirskii ekologicheskii zhurnal [Siberian ecological journal], 2016, no. 1, pp. 38-46. (in Russian)

Buryak L.V., Kukavskaya E.A., Kalenskaya O.P., Malykh O.F., Baksheeva E.O. Posledstviya lesnykh pozharov v yuzhnykh i tsentral'nykh raionakh Zabaikal'skogo kraya [Consequences of forest fires in the southern and central regions of the Trans-Baikal Territory]. Sibirskii lesnoi zhurnal [Siberian forest journal], 2016, no. 6, pp. 94-102. (in Russian)

Predbaikalie i Zabaikalie [Cisbaikal and Transbaikalia]. V.S. Preobrazhenskii (eds.). Moscow, Nauka Publ., 1965, 492 p. (in Russian)

Tsvetkov P.A., Buryak L.V. Issledovaniya prirody pozharov v lesakh Sibiri [Studies of the nature of fires in the forests of Siberia]. Sibirskii lesnoi zhurnal [Siberian forest journal], 2014, no. 3, pp. 25-42. (in Russian)

Groot de W.J., Cantin A.S., Flannigan M.D., Soja A.J., Gowman L.M., Newbery A.A comparison of Canadian and Russian boreal forest fire regimes. For. Ecol. Manag., 2013, vol. 294, pp. 23-34.

Kasischke E.S., Verbyla D.L., Rupp T.S., McGuire A.D., Murphy K.A., Jandt R., Barnes J.L., Hoy E.E., Duffy P.A., Calef M., Turetsky M.R. Alaska’s changing fire regime – implications for the vulnerability of its boreal forests. Can. J. For. Res., 2010, vol. 40, no. 7, pp. 1313-1324.

Forkel M., Thonicke K., Beer C., Cramer W., Bartalev S., Schmullius C. Extreme fire events are related to previous-year surface moisture conditions in permafrost-underlain larch forests of Siberia. Environ. Res. Lett., 2012, vol. 7, no. 4, pp. 1-9.

Flannigan M., Stocks B., Turetsky M., Wotton M. Impacts of climate change on fire activity and fire management in the circumboreal forest. Glob. Change Biol., 2009, vol. 15, iss. 3, pp. 549-560.

IPCC, 2013. Climate Change 2013: The Physical Science Basis. Stocker, T.F., D. Qin, G.-K. Plattner, M. Tignor, S.K. Allen, J. Boschung, A. Nauels, Y. Xia, V. Bex and P.M. Midgley (eds.). Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA, 203 p.

Kharuk V.I., Ranson K.J., Dvinskaya M.L. Wildfires dynamic in the larch dominance zone. Geophys. Res. Lett., 2008, vol. 35, iss. 1, pp. 1-6.

Dennison P.E., Brewer S.C., Arnold J.D., Moritz M.A. Large wildfire trends in the western United States, 1984-2011. Geophys. Res. Lett., 2014, vol. 41, iss. 8, pp. 2928-2933.

Rehfeldt G.E., Crookston N.L., Sáenz-Romero C., Campbell E.M. North American vegetation model for land-use planning in a changing climate: a solution to large classification problems. Ecol. Appl., 2012, vol. 22, iss. 1, pp. 119-141.

Ponomarev E.I., Kharuk V.I., Ranson K.J. Wildfires dynamics in Siberian larch forests. Forests, 2016, vol. 7, iss. 6. 125. pp. 1-9. https://doi.org/10.3390/f7060125

Loupian E.A., Mazurov A.A., Flitman E.V., Ershov D.V., Korovin G.N., Novik V.P., Abushenko N.A., Altyntsev D.A., Koshelev V.V., Tashchilin S.A., Tatarnikov A.V., Csiszar I., Sukhinin A.I., Ponomarev E.I., Afonin S.V., Belov V.V., Matvienko G.G., Loboda T. Satellite monitoring of forest fires in Russia at federal and regional levels. Mitigation and Adaptation Strategies for Global Change, 2006, vol. 11, iss. 1, pp. 113-145.

Shvidenko A.Z., Schepaschenko D.G. Climate change and wildfires in Russia. Contemp. Probl. Ecol., 2013, vol. 6, iss. 7, pp. 683-692.