Pyrogenic Influence on Pine Stands in the Conditions of Technogenic and Environmental Load
Abstract
Purpose. To develop a model of the effect of temperature on the tree trunk, depending on the duration of its impact, the distance from the edge of the fire and the height of the fire.
Methods. Mathematical modeling.
Results. The analytical study of thermal conductivity is reduced to the study of the space-time change of the basic physical quantity - temperature. The effect of thermal radiation on the stand is fires at a fire height of 2-3 meters. In this case, the maximum heat flow is directed horizontally to the stand and affects the crowns of coniferous undergrowth, burning needles, or overheating needles and buds, which leads to the death of young trees. Older trees receive only burns, which does not lead to their death, but reduces the quality of wood. Depending on the type of fire and its intensity, the convection heat flux differs in temperature and duration of exposure to the crown. Depending on these parameters, either the entire crown (buds, leaves, needles) burns, resulting in tree death, or the crown will be partially damaged and remain viable. The model of temperature dependence on the surface of the tree trunk on the height of the fire and the time of exposure of the pyrogenic factor is constructed. It is established that even in the case of grassroots fires, the heat flux density closer than 2 m from the flame exceeds 12 kW/m2, such a level of radiation causes burns immediately.
Conclusions. A model has been developed for the prediction of heat radiation from fire acting on tree trunks at different distances from the edge of the fire. The obtained results make it possible to predict the post-fire condition of stands. Damage to tree trunks and their death in fires also depends on the thickness of the bark and the time of exposure to high temperatures, as well as the diameter of the trunk.
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References
Asotskyi, V., Buts, Y., Kraynyuk, O. & Ponomarenko, R. (2018). Post-pyrogenic changes in the properties of grey forest podzolic soils of ecogeosystems of pine forests under conditions of anthropogenic loading. Journ. Geol. Geograph. Geoecology, 27(2), 175-183. https://doi.org/10.15421//111843
Laurance, W. F., Delamonica, P., Laurance S. G., Vasconcelos, H. & Lovejoy, T. E. (2000). Rainforest fragmentation kills big trees. Nature, 404(6780), 836 . https://doi.org/10.1038/35009032
Mesquita, R. C. G., Delamonica, P. & Laurance, W. F. (1999). Effect of surrounding vegetation on edge- related tree mortality in Amazonian forest fragments Biological Conservation, 91 (2-3), 129-134. https://doi.org/10.1016/S0006-3207(99)00086-5
Yankovich, E. P., Baranovskiy, N. V. & Yankovich, K. S. (2014). ArcGIS for assessment and display of the probability of forest fire danger. Proceedings of the 9th International Forum on Strategic Technology, IFOST, 6991108, 222-225.
Baranovsky, N. V. & Andreeva, K. (2015). Mathematical modeling of heat exposure from the front of a forest fire to a coniferous tree trunk Cloud of Science, 2(4), 591-598 (in Russian).
Buts, Yu. V. (2018). Features of geochemical migration of chemical elements after technogenic loading of pyrogenic nature Journal of Engineering Sciences, 5(2), H1-H4.
Buts, Y., Asotskyi, V., Krainiuk, O. & Ponomarenko, R. (2019). Dynamics of migration capacity of some trace metals in soils in the Kharkiv region under the pyrogenic factor. Journ. Geol. Geograph. Geoecology, 28(3), 409-416. https://doi.org/10.15421/111938
Buts, Y., Asotskyi, V., Kraynyuk, O. & Ponomarenko, R. (2018). Influence of technogenic loading of pyrogenic origin on the geochemical migration of heavy metals. Journ. Geol. Geograph. Geoecology, 27(1), 43-50. https://doi.org/10.15421/111829
Buts, Y. & Kraynyuk, O. (2018). Dynamics of geochemical migration ability of chemical elements under the influence of technogenic loading of pyrogenic origin. Open Information and Computer Integrated Technologies: Scientific Bulletin of the National Aerospace University, 80, 223-234 (in Russian).
Furyaev, V. V. & Furyaev, E. A. (2008). Piroecological properties of pine oriental in medium Siberia Coniferous boreal zone, 25(1–2), 103-108 (in Russian).
Michaletz S. T. & Johnson, E. A. (2008). A biophysical process model of tree mortality in surface fires Canadian Journal of Forest Research, 38(7), 2013-2029. https://doi.org/10.1139/X08-024
Michaletz, S. T., Johnson, E. A. & Tyree, M. T. (2012). Moving beyond the cambium necrosis hypothesis of post-fire tree mortality: cavitation and deformation of xylem in forest fires. New Phytologist, 194 (1), 254–263. https://doi.org/10.1111/j.1469-8137.2011.04021.x
Dickinson, M. B. & Johnson, E. A. (2004). Temperature-dependent rate models of vascular cambium cell mortality. Canadian Journal of Forest Research, 34(3), 546–559. https://doi.org/10.1139/x03-223
Sutherland, E. K. & Smith, K. T. (2000). Resistance is not futile: the response of hardwoods to fire-caused wounding. Proceedings of the workshop on fire, people, and the central hardwood landscape. Gen. Tech. Rep. NE-274.
Buts, Y. (2018). Systematization of processes of pyrogenic relaxation of ecogeosystems in conditions of technogenic loading. Ecological safety, (1(25)), 7-12. https://doi.org/10.30929/2073-5057.2018.1.7-12
(in Ukraine).
Brose, P. H. & Van Lear, D. H. (2004). Survival of hardwood regeneration during prescribed fires: the importance of root development and root collar location. Upland oak ecology symposium: history, current conditions, and sustainability. Gen. Tech. Rep. SRS-73. Asheville, 123-127.
Green, S. R., Arthur, M. A. & Blankenship, B. A. (2010). Oak and red maple seedling survival and growth following periodic prescribed fire on xeric ridgetops on the Cumberland Plateau. Forest Ecology and Management, 259 (12), 2256-2266. Retrieved from https://www.sciencedirect.com/journal/forest-ecology-and-management/vol/259/issue/12
Lyikov, A. V. (1980). Heat conduction theory, Мoskow: Energiya (in Russian).
Valendik, E. N. & Kosov, I. V. (2008). Impact of thermal radiation of a forest fire on the environment Siberian Journal of Ecology, (4), 517-523 (in Russian).
Cohen, J. D. (2004). Relating Flame radiation to home ignition using modeling and experimental crown fires Canadian Journal of Forest Research, 34 (8), 1616-1626. https://doi.org/10.1139/x04-049
Van Wagner, C. E. (1968). Fire behaviour mechanisms in a Red Pine Plantation:field and laboratory evidence, Forestry branch departmental publication Queen’s printer and controller of stationary, 1229, 30.
Buts, Yu. (2020). Scientific and methodological bases of relaxation of ecosystems under technogenic loading of pyrogenic origin. (Master’s thesis). Sumy: Sumy State University. Retrieved from http://essuir.sumdu.edu.ua/handle/123456789/76266 (in Ukraine).
Kuznetsov, G. V., & Baranovskiy, N. V. (2014). Mathematical simulation of heat transfer at coniferous tree ignition by cloud-to-ground lightning discharge. In EPJ Web of Conferences (Vol. 76). [01028] EDP Sciences. https://doi.org/10.1051/epjconf/20147601028
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