MODELING SMOLDERING EMISSIONS FROM PRESCRIBED BROADCAST BURNS IN THE PACIFIC-NORTHWEST

被引：6

作者：

FERGUSON, SA

HARDY, CC

机构：

[1] US Department of Agriculture, Forest Service, Pacific Northwest Research Station, Seattle, WA, 98105

来源：

INTERNATIONAL JOURNAL OF WILDLAND FIRE | 1994年 / 4卷 / 03期

关键词：

PRESCRIBED BURNING; SMOLDERING; SILVICULTURE; SMOKE; EMISSIONS;

D O I：

10.1071/WF9940135

中图分类号：

S7 [林业];

学科分类号：

0829 ; 0907 ;

摘要：

The objective of this study was to improve a smoke emissions model that is currently being used to help reduce pollution impacts from prescribed burning of timber harvest residues. Smoke emissions from these types of burns have been characterized with in situ, real time sampling packages. When emissions flux data from these sampling packages were compared with an existing emissions production model, it was found that the variety of rate characteristics for smoldering combustion caused by different burning conditions were not adequately described by the model. Therefore, we used the acquired data to develop an improved model for the early smoldering portion of broadcast prescribed fires. First, the data were compared with field measurements of pre-burn fuel loading, fuel moisture, and calculated biomass consumption. A linear relation was found between total biomass consumption and a rate constant for the exponential decay of smoldering emissions. The resulting regression equation was compared with observed data from previous studies and found to adequately predict an exponential decay constant, which is used to describe the early smoldering portion of harvest residue burns.

引用

页码：135 / 142

页数：8

共 14 条

[1]

Anderson H.E., Heattransfer and Fire Spread. United States Department of Agriculture, (1969)

[2]

Brown J.K., Handbookfor Inventorying Downed Woody Material. United States Department of Agriculture, Forest Service, General Technical Report INT-16. Intermountain Forest and Range Experiment Station, (1974)

[3]

Ottmar R.D., Little S.N., Ohmann J., Predicting duff reduction to reduce smoke from clear-cut slash bums in western Washington and western Oregon. Eighth Conference on Fire and Forest Meteorology, American Meteorological Society, Boston, Massachusetts, pp. 139-144, (1985)

[4]

Ottmar R.D., Bums M.F., Hall J.N., Hansen A., CONSUME Users Guide. United States Department of Agriculture, Forest Service, Pacific Northwest Research Station, General Technical Report PNW-304, (1993)

[5]

Paul J.T., Lavdas L.G., Wells W., Use of general weather and dispersion index to minimize the impact of smoke on highway visibility, Georgia Forest Research Paper, 69, (1987)

[6]

Peterson Unpublished J.L., Analysis and Reduction of Errors in Predicting Prescribed Burning Emissions, (1987)

[7]

Rothermel R.C., A mathematical model for predicting fire spread in wildland fuels. United States Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station, Ogden, Utah, Research Paper INT-115, (1972)

[8]

Sandberg D.V., Slash Burning and Fuel Consumption in the Douglas-Frr Subregion. Seventh Conference on Fire and Forest Meteorology, American Meteorological Society, pp. 90-93, (1983)

[9]

Sandbergpeterson D.V., A source strength model for prescribed fires in coniferous logging slash. Presented to the 1984 Annual Meeting, Air Pollution Control Association, Pacific Northwest Section, Portland, Oregon. United States Department of Agriculture, Forest Service, Reprint, pp. 84-20, (1984)

[10]

Susott R.A., Wardbabbitt D.E., Lathamboyd P.M., Fire Dynamics and Chemistry of Large Fires, pp. 89-903, (1990)

← 1 2 →