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Project ID: 11-1-2-22

Year: 2011

Date Started: 06/01/2011

Ending Date:  09/30/2015

Title: Deriving Fundamental Statistical Shrub Fuel Models by Laser Scanning and Combustion Experimentation

Project Proposal Abstract: This project is developing methods to spatially represent shrub fuel matrices of chamise (Adenostoma fasciculatum Hook. & Arn.) and sagebrush (Artemisia tridentata Nutt.) using laser scanning, simulating fire propagation through them, and validating simulations against measurements of shrub fires in a burn chamber. It addresses shrub fuel modeling through integration of two important and related research threads: (1) Precise spatial representation of shrub fuels, and (2) behavior of fire within shrub fuel matrices. Developing models of shrub fuels as the basis for accurate and replicable inputs to a variety of fundamental and statistical sub-grid models used in complex physic-based fire spread simulations is a vital step in producing more computationally efficient, widely applicable fire models for shrub fuels. By creating inputs to sub-grid models from laser point clouds and testing them against measurements of actual fire behavior, the project aims to describe the complexity of shrub fuel beds for fire behavior modeling and provide scale integration from leaf to shrub to landscape. We exploit the measurement capacity of a terrestrial laser scanner to: (1) precisely characterize shrub fuel matrices in a laboratory setting, (2) abstract fuel elements for sub-grid fire behavior modeling, (3) model fire propagation from an herbaceous understory through shrub canopies, and (4) compare model output to measurements of fire behavior from shrubs ignited in a burn chamber. The project is based on the principle that developing dynamic fuel models for shrub lands requires tiered experiments starting with burning of individual leaves in the laboratory, followed by combustion of whole shrubs in a wind tunnel, and culminating in burning of field plots of representative fuels. Leaf experiments have provided a large initial database of combustion characteristics, whole shrub experiments have just begun (2009), with field trials predicated on knowledge gained from tests conducted at shrub-scale. Our work is consequently at whole-shrub scale within a laboratory setting, and although field experiments are beyond its scope, an important goal is to provide scale integration between the laboratory and the field. The terrestrial laser scanner is expected to provide this integration due to its ability to consistently and precisely measure fuel geometries at long ranges.

Principal Investigator: Carl A. Seielstad

Agency/Organization: University of Montana

Branch or Dept: Department of Forest Management


Other Project Collaborators

Type

Name

Agency/Organization

Branch or Dept

Agreements Contact

Jennifer R. Jones

Forest Service

PSW-Pacific Southwest Research Station

Budget Contact

Anna Wong

Forest Service

PSW-Pacific Southwest Research Station

Co-Principal Investigator

Thomas H. Fletcher

Brigham Young University

Department of Chemical Engineering

Federal Cooperator

David R. Weise

Forest Service

PSW-Forest Fire Lab-Riverside


Project Locations

Consortium

California

Great Plains

Northern Rockies


Level

State

Agency

Unit

REGIONAL

Interior West

FED

REGIONAL

Interior West

STATE

REGIONAL

Pacific Coast States

FED


Project Deliverables

There is no final report available for this project.
  ID Type Title
view or print   1096 Poster Semi-Empirical Fire Spread Simulator for Utah Juniper and Chamise Shrubs
view or print   5673 Invited Paper/Presentation Application of L Systems to Geometrical Construction of Chamise and Juniper Shrubs

Supporting Documents

There are no supporting documents available for this project.

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