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Comparison of Annual Inventory Designs Using Forest Inventory and Analysis Data

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Abstract:

Three annual inventory designs, a periodic design, and a periodic measurement with midcycle update design are compared using a population created from 14,754 remeasured Forest Inventory and Analysis plots. Two of the annual designs and the midcycle update design allow updating of plots not measured using sampling with partial replacement procedures. Comparisons are based on root mean square error and estimator bias determined for net volume (m3/hectare) and mean annual net volume change. For the annual designs, both individual year and moving average estimates are investigated. The latter are compared to both the population means of the most recent year used in the average and to population means covering the same period as the estimate. Among annual designs, a rotating panel design, in which an equal portion of the total sample is measured each year without remeasurement until the start of the next measurement cycle, produced the smallest root mean square error for estimates of mean net volume. For multiple-year comparisons, the rotating panel and periodic designs resulted in the smallest root mean square errors; for single-year comparisons, the periodic design resulted in the smallest root mean square error. For mean annual volume change, the smallest root mean square error was produced by the periodic design. Among annual designs, the rotating panel design resulted in the smallest root mean square error for multiple-year comparisons of volume change, while a design allowing annual updates of estimates using generalized least squares resulted in the smallest root mean square error for single-year comparisons. FOR. SCI. 50(2):188–203.

Keywords: Rotating panel design; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; generalized least squares; moving average estimates; natural resource management; natural resources

Document Type: Regular Article

Affiliations: 1: Formerly Supervisory Forester Northeastern Research Station USDA Forest Service 11 Campus Boulevard, Suite 200 Newtown Square PA 19073 2: Research Forester Northeastern Research Station USDA Forest Service 11 Campus Boulevard, Suite 200 Newtown Square PA 19073 Phone: (610) 557-4043;, Fax: (610) 557-4250, Email: jameswestfall@fs.fed.us 3: Forest Inventory and Analysis Program Manager Northeastern Research Station USDA Forest Service 11 Campus Boulevard, Suite 200 Newtown Square PA 19073 Phone: (610) 557-4020, Email: ctscott@fs.fed.us

Publication date: April 1, 2004

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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