1. VULNERABILITY ASSESSMENT OF THE JOŠANIČKA RIVER BASIN BY TORRENTIAL FLOODS AND FOREST FIRES
Ivan Novković, University of Belgrade, Faculty of Geography
Slavoljub Dragićević, University of Belgrade, Faculty of Geography
Nenad Živković, University of Belgrade, Faculty of Geography
Radislav Tošić, University of Banja Luka, Faculty of Science

2. JOŠANIČKA RIVER BASIN Located in Central Serbia 257.61 km2
Jošanička river km (42.1 km)
National park “Kopaonik“
Jošanička spa
Ground Safety Zone

3. MATERIAL AND METHODS Flash Flood Potential Index (FFPI)
𝐹𝐹𝑃𝐼= 𝑎 1 ·𝑀+ 𝑎 2 ·𝑆+ 𝑎 3 ·𝐿+ 𝑎 4 ·𝑉 𝑛=1 4 𝑎 𝑛
𝐹𝐹𝑃𝐼= 2𝑀+𝑆+ 𝐿+ 0.5𝑉 4.5
𝑀= 10 𝑛/30
𝑉=10· е −2.303·𝑁𝐷𝑉𝐼 . 𝑓𝑜𝑟 𝑁𝐷𝑉𝐼>0
𝑉=𝑁𝐷𝑉𝐼+1. 𝑓𝑜𝑟 𝑁𝐷𝑉𝐼≤0

4. Forest Fires Susceptibility Index (RC) 𝑅𝐶=7 𝑉 𝑇 +5 𝑆+𝐴 +3( 𝐷 𝑅 + 𝐷 𝑆 )
𝑅𝐶=7 𝑉 𝑇 +5 𝑆+𝐴 +3( 𝐷 𝑅 + 𝐷 𝑆 )
Value
Vegetation and land use type
Slope [°]
Aspect
Distance from objects [m]
Distance from roads [m] 5
Coniferous forest, transitional woodland-shrub
>35 S
<500
<150 4
Broad-leaved forest
25-35 W 3
Agricultural areas with natural vegetation, meadows, natural grassland
10-25 E 2
Sparsely vegetated areas, agricultural areas, bigger settlements, industrial and comercial zones, mineral extraction sites
5-10
unexposed 1
Water bodies
<5 N
>2000
>600

5. Results obtained via GIS
Classification of results on 4 susceptibility classess
Classification of water courses based on FFPI
Recalculation of FFPI based on RC and classification of results

6. Slope Slope [°] Area [km2] % of total area <10 38.67 15.01 10-20
103.43
40.15
20-30
86.62
33.63
30-40
27.04
10.50
40-50
1.75
0.68
>50
0.10
0.04

7. Aspect Aspect [°] Area [km2] % of total area N 66.84 25.95 E 62.10
24.11 S
52.92
20.54 W
75.12
29.16
unexposed
0.63
0.24

8. Soil Soil type Area [km2] % of total area 1
distric cambisol, ranker, lithosol on the shist and gneiss
116.80
45.34 2
distric cambisol, ranker, lithosol on the granite, granodiorite and quarzlatite
30.52
11.85 3
distric cambisol, ranker, lithosol on the andesite, dacite and tuff
10.77
4.18 4
distric cambisol, eutric ranker, lithosol on the the serpentinites and alkaline igneous rocks
71.50
27.75 5
distric cambisol, ranker, lithosol on the sandstone, flysch and cherts
9.48
3.68 6
calcocambisol, calkomelanosol, lithosol on carbonate rocks
14.53
5.64 7
alluvial soil
3.62
1.40 8
peat soil
0.39
0.15

9. Vegetation and land use type
CORINE Land Cover
Area [km2]
% of total area
112
Discontinuous urban fabric
0.38
0.15
131
Mineral extraction sites
0.05
0.02
231
Pastures
3.79
1.47
242
Complex cultivation patterns
15.62
6.06
243
Land principally occupied by agriculture, with significant areas of natural vegetation
40.33
15.66
311
Broad-leaved forest
105.03
40.77
312
Coniferous forest
39.21
15.22
313
Mixed forest
7.05
2.74
321
Natural grasslands
10.70
4.15
324
Transitional woodland-shrub
29.73
11.54
333
Sparsely vegetated areas
5.71
2.22

10. NDVI

11. Distance from settlements and roads

12. Flash Flood Potential Index

13. Susceptibility
Area [km2]
% of total area
very high
17.54
6.81
high
123.53
47.95
medium
89.13
34.60
low
27.42
10.64

14. Susceptibility
Length [km]
% of total length
very high
128.88
24.10
high
298.03
55.73
medium
90.08
16.85
low
17.75
3.32

15. Forest Fires Susceptibility Index

16. Susceptibility
Area [km2]
% of total area
very high
10.29
3.99
high
48.48
18.82
medium
104.50
40.57
low
94.34
36.62

18. THANK YOU FOR ATTENTION!