Numerical analysis of transient soil temperature variation during wildfires

Year 2024, Volume: 7 Issue: 4, 578 - 587, 31.12.2024

Mehmet Turgay Pamuk

https://doi.org/10.35208/ert.1425123

Abstract

In this study, transient behavior of soil temperature during large forest fires is analyzed using the Comsol© software package. The increase in soil temperature during large wildfires can be very critical, especially when oil or gas pipelines have been laid at a certain depth in the soil mainly near forests. During forest fires, the temperature of the soil surface can reach extreme levels that penetrate deep into the ground if the fire is not extinguished within a short time. This increase in temperature on the soil surface can lead to extremely dangerous situations if the laying depth of the pipeline is not sufficient, as the heat conducted through the soil causes the surface temperature of the pipeline and therefore that of the fluid inside it to reach even high values. This can lead to a sudden rupture of the pipeline and ultimately lead to catastrophic consequences. The present study is conservative due to the assumptions made in structuring the numerical model. However, it is believed to provide invaluable information about the considerations in selecting gas pipeline locations and pipeline laying depths taking into account extreme temperatures due to wildfires. There is limited research on the topic regarding the time dependent conduction heat transfer through soils as a result of fires, but only in one dimension. Current study, being multi-dimensional, is therefore believed to be novel in the field. Future research could include extensive study on the energy content of different species of forest trees, considering their time-dependent heat release rates (HRR) during a forest fire, as well as experimental work if a field setup could be designed.

Keywords

Conduction , pipe lines , radiation , soil properties , transient heat transfer , wild fires

References

• W. Lamb, T. Wiedmann, J. Pongratz, R. Andrew, M. Crippa, J. G. J. Olivier, … and J. Minx, “A review of trends and drivers of greenhouse gas emissions by sector from 1990 to 2018,” Environmental Research Letters, Vol. 16, Article 073005, 2021. [CrossRef]
• E. Albert-Beldaa, M. B. Hinojosaa, V. A. Laudicinab, and J. M. Moreno, “Soil biogeochemistry and microbial community dynamics in Pinus pinaster Ait. forests subjected to increased fire frequency,” Science of the Total Environment, Vol. 858, Article 159912, 2023. [CrossRef]
• L. Marfella, R. Marzaioli, and F. A. Rutigliano, “Medium-term effects of wildfire severity on soil physical, chemical and biological properties in Pinus halepensis Mill. woodland (Southern Italy): an opportunity for invasive Acacia saligna colonization?” Forest Ecology and Management, Vol. 542, Article 121010, 2023. [CrossRef]
• X. Liu, S. Liang, H. Ma, B. Li, Y. Zhang, Y. Li, … and J. Teng, “Landsat-observed changes in forest cover and attribution analysis over Northern China from 1996‒2020,” Giscience & Remote Sensing, Vol. 14(1), 2024. [CrossRef]
• M. Singh and Z. Huang, "Analysis of forest fire dynamics, distribution and main drivers in the Atlantic forest," Sustainability, Vol. 14, Article 992, 2022. [CrossRef]
• H. Heidari, M. Arabi, and T. Warziniack, “Effects of climate change on natural-caused fire activity in Western U.S. national forests,” Atmosphere, Vol. 12, Article 981, 2021. [CrossRef]
• S. Kumar, and A. Kumar, “Hotspot and trend analysis of forest fires and its relation to climatic factors in the western Himalayas,” Natural Hazards, Vol. 114, pp. 3529–3544, 2022. [CrossRef]
• T. Kim, S. Hwang, and J. Choi, “Characteristics of spatiotemporal changes in the occurrence of forest fires,” Remote Sensing, Vol. 13, Article 4940, 2021. [CrossRef]
• A. Basco, A. Di Benedetto, V. Di Sarli, and V. E. Salzano, “How drought is affecting wildfire related risks for natural gas pipeline,” in Proceedings of the XXXIX Meeting of the Italian Section of the Combustion Institute, pp. X2.1-X2.6., 2016.
• S. I. Martínez, C. P. Contreras, S. E. Acevedo, and C. A. Bonilla, “Unveiling soil temperature reached during a wildfire event using ex-post chemical and hydraulic soil analysis,” Journal of Food Engineering, Vol. 90, pp. 20–26, 2009.
• B. W. Butler, J. Cohen, D. J. Latham, R. D. Schuette, P. Sopko, K. S. Shannon, D. Jimenez, and L. S, “Measurements of radiant emissive power and temperatures in crown fires,” Canadian Journal of Forest Research, Vol. 34, pp. 1577–1587, 2014. [CrossRef]
• X. Silvani, F. Morandini, and J. F. Muzy, “Wildfire spread experiments: Fluctuations in thermal measurements,” International Communications in Heat and Mass Transfer, Vol. 36, pp. 887–892, 2009. [CrossRef]
• A. V. Oskouei, A. Tamjidi, and P. Pourshabani, “Effects of burial depth in the behavior of buried steel pipelines subjected to strike-slip fault,” Soil Dynamics and Earthquake Engineering, Vol. 123, pp. 252-264, 2019. [CrossRef]
• A. Yiğit, “Embedment depths of natural gas pipelines,” El-Cezerî Journal of Science and Engineering, Vol. 8, pp. 471-480, 2021.
• R. Petráš, J. Mecko, J. Kukla, and M. Kuklová, “Calorific value of basic fractions of above-ground biomass for Scots pine,” Agriculturae Nitriae, Vol. 2, pp. 34–37, 2019. [CrossRef]
• W. S. Zeng, S. Z. Tang, and Q. H. Xiao, “Calorific values and ash contents of different parts of Masson pine trees in southern China,” Journal of Forestry Research, Vol. 25(4), pp. 779−786, 2014. [CrossRef]
• S. S. Sackett, and S. M. Haase, “Measuring soil and tree temperatures during prescribed fires with thermocouple probes,” General Technical Reports PSW-GTR-131, Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture, 1992. [CrossRef]
• H. K. Preisler, S. M. Haase, and S. Sackett, “Modeling and risk assessment for soil temperatures beneath prescribed forest fires,” Environmental and Ecological Statistics, Vol. 7, pp. 239-254, 2000. [CrossRef]
• P. R. Robichaud, W. J. Massman, A. S. Bova, A. G. García, M. Lesiecki, “The Next Generation Soil Heating Model,” JFSP Project ID: 15-1-05-11, 2018.
• A. W. Bailey and M. L. Anderson, “Fire temperatures in forest communities grass, shrub and Aspen forest communities of Central Alberta,” Journal of Range Management, Vol. 33, pp. 37-40, 1980. [CrossRef]
• H. Fajković, M. Ivanić, I. Nemet, S. Rončević, Š. Kampić, and D. V. Leontić, “Heat–induced changes in soil properties: fires as cause for remobilization of chemical elements,” Journal of Hydrology and Hydromechechanic, Vol. 70(4), pp. 421–431, 2022. [CrossRef]
• S. L. Manzello, A. Maranghides, J. R. Shields, W. E. Mell, Y. Hayashi, and D. Nii, “Measurement of firebrand production and heat release rate (HRR) from burning Korean pine trees,” International Association for Fire Safety Science (AOFST 7 symposium), 2007.
• E. G. Richter, E. C. Fischer, and B. P. Wham, “Simulation of heat transfer through soil for the investigation of wildfire impacts on buried pipelines,” Fire Technology, Vol. 58, pp. 1889–1915, 2022. [CrossRef]
• H. Wang, and I. J. Duncan, “Likelihood, causes, and consequences of focused leakage and rupture of U.S. natural gas transmission pipelines,” Journal of Loss Prevention in the Process Industries, Vol. 30, pp. 177-187, 2014. [CrossRef]
• G. Bayat, and K. Yıldız, “Comparison of the Machine Learning Methods to Predict Wildfire Areas,” Turkish Journal of Science & Technology, Vol. 17(2), pp. 241-250, 2022. [CrossRef]
• T. L. Bergman, A. S. Lavine, and F. Incropera, “Fundamentals of Heat and Mass Transfer, 7th ed., Wiley, pp. 310-317, 2011.
• Y. Çengel, “Heat Transfer: A Practical Approach with EES CD,” 2nd ed., McGraw Hill, 2002, pp. 228231.
• S. V. Makarychev, and A. G. Bolotov, “Structural-functional concept of thermophysical condition of the soils of Altai Region,” Eurasian Journal of Soil Science, Vol. 5(4), pp. 279-284, 2016. [CrossRef]