DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 9-10/2023 str. 72 <-- 72 --> PDF |
while the rainiest was in 2014 (table 3). The year 2014 was one of the wettest (Tošić et al., 2017) with significant amounts of precipitation during the growing season. Table 3 shows that at all meteorological stations, the years 2011, 2012, 2017,2019 and 2022 have a lack of precipitation. Deficit precipitation caused a pronounced decrease in the humidity of the surface layer of the soil, as well as a decrease in the humidity in the deeper layers. Excess precipitation in this area was recorded in 2009, 2010, 2014, 2016 and 2018 (table 3). Table 3 shows that in 2014 the amount of precipitation was higher than the multi-year average by 327.3 mm at Crni Vrh, i.e. 591.2 mm in Negotin and 437.8 mm in Zaječar. The dynamics of forest fire outbreaks in the area of northeastern Serbia – Dinamika izbijanja šumskih požara na području sjeveroistočne Srbije Fire season in the area of northeastern Serbia varies significantly from year to year. Figure 2 shows the number of forest fires during the period 2009-2022. years. The year with the highest number of forest fires (2012) is characterized by extreme fire weather conditions, especially a combination of long periods of drought and high air temperatures. The lowest number of forest fires (in 2014) (Figure 2) is in years with precipitation that is significantly above multi-year average values, which then create wet conditions and reduce the risk of fire occurrence. The number of forest fires in the area of northeastern Serbia is the highest during the months of March (24.1%) and September (15.2%), Figure 3. Fires occur in the period from January to December, which also constitutes the fire period in the area of northeastern Serbia. The defined period of occurrence of forest fires of 12 months during the year indicates that there is a long fire season in the area of northeastern Serbia. Figure 3 shows that the number of fires is greater in the second half of the year. The monthly occurrences of forest fires in 2012 and 2014 is shown in Table 4. Table 4 shows a large number of fires that occured in March 2012, which is correlated with the negative monthly moisture index and high values of the burning index (B) for the month of March. The monthly moisture index for the area of northeastern Serbia for different periods is shown in table 5. It is noticeable (table 5) that for the period 1961-1990. at Crni Vrh, a positive monthly moisture index was. The area of Zaječar and Negotin has a negative monthly moisture index for the months of July, August and September, when forest fires are likely to occur. Table 5 shows a significantly longer fire season in 2012 compared to 2014 at all stations. The values of the burning index are shown in table 6. The presented tabular data indicate that running fire, occasional torching of tree crowns (40≤B≤ 59) is possible during the |