Method

method

Forest and Woodlands

For more information on the methodologies used in the study, see the ‘Woodfuel Resource in Britain’ final report. Summary available here.

Traditional forestry: information on the existing forest resource is based on the sub-compartment database (Forest Enterprise/public forest), and on the National Inventory of Woods and Trees (privately-owned forest). Growth rates for the parts of the stem presently marketed are obtained from the same data sources. Relationships were determined to extrapolate from this portion of the stem to all biomass components (excluding fine roots). These relationships were used in conjunction with existing forecasting models to estimate future growth of all tree components. In the cases of harvesting brash, site and environmental constraints on the proportion of the biological production that could be made available were determined for each Forestry Commission Forest District. These constraints were extrapolated to the private sector using best available information on site differences.

Primary Processing Co-products

Primary processing co-product information was derived from the 2001 Annual Sawmill Survey and the co-incident Triennial Sawmill Survey. These provide information on volume, form and use of co-product.

Arboricultural Arisings

Arboricultural arisings were estimated by questionnaire to over 2000 arboricultural companies, tree officers and local authorities. The questionnaire was completed during 2002.

Short Rotation Coppice

Short rotation coppice was determined from the databases of the Woodland Grant Scheme and the Energy Crops Scheme using assumptions of average annual yield.

For more information on the methodologies used in the study, see the ‘Woodfuel Resource in Britain’ final report.

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