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Table 5 Expected annual number of wildfires that reach the wildland-urban interface (WUI) defense zone (NWUI), conditional WUI defense zone area burned per fire (A′WUI, ha fire−1), and expected annual WUI-area burned (AWUI; ha yr−1) for all fires and with application of RO rules by month of fire start. AWUI is assumed to be the same for RO fires as it is for all fires.

From: Quantifying the Threat of Unsuppressed Wildfires Reaching the Adjacent Wildland-Urban Interface on the Bridger-Teton National Forest, Wyoming, USA

 

All fires

RO fires

 

NWUI (fires yr−1)

A′WUI (ha fire−1)

AWUI (ha yr−1)

NWUI (fires yr−1)

AWUI (ha yr−1)

May

0.004

550

2.4

0.000

0.0

Jun

0.014

488

6.8

0.001

0.7

Jul

0.032

362

11.5

0.008

2.9

Aug

0.030

289

8.7

0.014

3.9

Sep

0.003

90

0.3

0.002

0.2

Oct

0.000

168

0.1

0.000

0.1

Nov

0.000

279

0.0

0.000

0.0

Dec

0.000

0

0.0

0.000

0.0

Total

0.084

465

29.9

0.025

11.8