Effects of weather, landscape structure, and management on fire spread: Comparison between WI hardwoods and NJ Pinelands, USA Zheng, D 1* ., J.J. LaCroix 1 , S. Ryu 1 , J. Chen 1 , J. Hom 2 , and K. Clark 2 1 University of Toledo, Toledo, OH 43606, USA.
Zheng, D1*., J.J. LaCroix1, S. Ryu1, J. Chen1, J. Hom2, and K. Clark2
1 University of Toledo, Toledo, OH 43606, USA.
2 USDA Forest Service, Newtown Square, PA 19073, USA
The mean burned area (MBA) of 24 fires in the CNF after a 15-day burning duration was 3,867 ha, while it was 8% larger in the NJP (4,177 ha) using the same weather inputs even though the fuel’s mean rate of spread (MROS, m/hr) in the NJP increase to 334 m/hr from 183 m/hr in the CNF, by 83%, indicating effects of LS structure.
*** Burned areas in the NJP > in CNF due to highly volatile fuels.
*** Fire spread was + with landscape fragmentation. The combination of fuel/structure determine fire areas/patterns if other factors are constants.
*** In CNF C & D (4%) could reduce BA up to 2.4% (ns). In the NJP (less fragm) increase BA especially under extreme weather conditions (*16% in SUM). Cutting methods on fire spread are more complicated and interacted with land-use history, fuel type composition, and weather. Thus, forest management planning should be flexible & aim to the characteristics of a given landscape to minimize fire spread. More studies are desired.
*** Cross-season variation >? within-season variation, depending on weather combination.
*** Road effects on fire are not simply related to density (density==0.63/0.33=191%, effect=0.685/0.275=249%). Furthermore,if human factors are considered (95% between 1985-95 in GLR were human caused), the effects could go opposite way. Need more comprehensive studies. Road effects can be enhanced when weather conditions are more favorable to fire spread.
The Joint Fire Science Project (JFSP) and the Northern Global Change Program (NGCP) primarily support this research.