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Project ID: 04-2-1-49

Year: 2004

Date Started: 08/31/2004

Date Completed: 01/09/2007

Title: Litter and Duff Bulk Densities in the Southern United States

Project Proposal Abstract: The organic layer (litter and duff) in forest, shrub, and grasslands can represent the bulk of the fuels consumed during wildland fires in southern ecosystems; it is imperative that organic layer depth measurements can be converted to mass as managers often measure the depth of the litter and organic duff layers. In order to convert depth measurements to mass, a bulk density is required for each layer. Also, the DMM600 Duff Moisture Meter developed through collaboration between Campbell Scientific, Inc. and the USDA, Forest Service, Rocky Mountain Research Station and Missoula Technology and Development Center measures volumetric moisture of forest floor materials. These volumetric moisture contents can be converted to gravimetric moisture content if duff bulk density values are known. Organic layer mass and duff moisture are critical variables when estimating fuel consumption and potential fire effects such as tree and shrub mortality, and smoke production during wildland fire. Some field research has been conducted to quantify organic layer bulk densities in the southeastern part of the United States, although it has generally been limited to less productive sand pine and sand hill sites at Eglin Air Force Base. The objective of this research proposal is to quantify bulk density for litter and duff layers in 6) forest, shrub, and grassland fuelbed types. The data will be compiled and analyzed to provide bulk density values for use in specific vegetation types.

Principal Investigator: Roger D. Ottmar

Agency/Organization: Forest Service

Branch or Dept: PNW-Seattle-Managing Natural Disturbances

Other Project Collaborators




Branch or Dept

Co-Principal Investigator

Clinton S. Wright

Forest Service

PNW-Seattle-Managing Natural Disturbances

Federal Cooperator

Roger D. Ottmar

Forest Service

PNW-Seattle-Managing Natural Disturbances

Project Locations

Fire Science Exchange Network


There are no project locations identified for this project.

Project Deliverables

Final Report view or print

("Results presented in JFSP Final Reports may not have been peer-reviewed and should be interpreted as tentative until published in a peer-reviewed source.")

  ID Type Title
    1212 Government Publication Modification and Validation of Fuel Consumption Models for Use in Longleaf Pine Types of the Southeast
    1097 Conference/Symposia/Workshop Southern Bulk Density Data Results

Supporting Documents

There are no supporting documents available for this project.

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