Table 3 Characteristics of observed and randomly located re-burns by size class for each study area. Size class thresholds reflect the common fire size classes as recognized by the NWCG (2006). The numbers for the random values reflect the average of the 50 simulations.
From: Characterizing Fire-on-Fire Interactions in Three Large Wilderness Areas
| Â | Â | Â | Re-burn size class (ha) | |||
|---|---|---|---|---|---|---|
| Â | Â | Â | 40 to 121 | 121 to 405 | >405 | Total |
Bob Marshall | Observed | Frequency | 11 | 6 | 12 | 29 |
Proportion of total occurrence (%) | 38 % | 21 % | 41 % | 100 % | ||
Total area re-burned (ha) | 698 | 1 593 | 13 853 | 16 144 | ||
Average size of re-burn (ha) | 63 | 266 | 1 154 | 557 | ||
Random | Average frequency | 8 | 10 | 18 | 36 | |
Proportion of total occurrence (%) | 22 % | 28 % | 18 % | 100 % | ||
Average total area re-burned (ha) | 606 | 2 413 | 36 078 | 39 098 | ||
Average size of re-burn (ha) | 73 | 237 | 2 025 | 1 075 | ||
Selway-Bitterroot | Observed | Frequency | 13 | 8 | 5 | 26 |
Proportion of total occurrence (%) | 50 % | 31 % | 19 % | 100 % | ||
Total area re-burned (ha) | 925 | 2 070 | 5 942 | 8 937 | ||
Average size of re-burn (ha) | 71 | 259 | 1 188 | 344 | ||
Random | Average frequency | 8 | 11 | 7 | 26 | |
Proportion of total occurrence (%) | 31 % | 42 % | 27 % | 100 % | ||
Average total area re-burned (ha) | 572 | 2 702 | 6 317 | 9 591 | ||
Average size of re-burn (ha) | 73 | 240 | 880 | 366 | ||
Frank Church | Observed | Frequency | 85 | 63 | 80 | 228 |
Proportion of total occurrence (%) | 37 % | 28 % | 35 % | 100 % | ||
Total area re-burned (ha) | 6 040 | 15 535 | 150 099 | 171 674 | ||
Average size of re-burn (ha) | 71 | 247 | 1 876 | 753 | ||
Random | Average frequency | 54 | 72 | 118 | 244 | |
Proportion of total occurrence (%) | 22 % | 30 % | 48 % | 100 % | ||
Average total area re-burned (ha) | 3 968 | 17 775 | 251 656 | 273 399 | ||
Average size of re-burn (ha) | 74 | 247 | 2 134 | 1 122 | ||