Graduate Thesis Or Dissertation

 

Private timber supply projections for western Oregon and Washington : a comparison with 1980 RPA timber supply estimates Public Deposited

Downloadable Content

Download PDF
https://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/qf85nf21v

Descriptions

Attribute NameValues
Creator
Abstract
  • The Timber Resource Analysis System (TRAS) was the timber supply projection model used in conjunction with the Timber Assessment Market Model (TAMM) to predict future U.S. softwood timber harvests, inventories and product prices in the 1980 RPA Timber Assessment conducted by the USDA Forest Service. Several criticisms of the TRAS model prompted the Forest Service to fund the development of the Timber Resource Inventory Model (TRIM), which will be used in the 1990 assessment. Unlike TRAS, TRIM has the ability to portray timber growth and management for individual groups of inventory acres, based on ownership, location, species and site characteristics, while allowing management intensities to fluctuate in response to predicted prices. The purpose of this study is to compare results of the TRAS projections for privately owned timberlands of the Pacific Northwest Westside region with three 50-year TRIM projections (1977-2027), which use TRAS/TAMM generated harvest volumes as harvest requests and Forest Service inventory figures. Projected harvests, inventories and age class distributions are compared, along with an analysis of changes in western Oregon and Washington's future harvest share. TRAS/TAMM harvest levels on forest industry property could not be fully sustained in the TRIM simulations. Although the two TRIM simulations that included a prespecified amount of commercial thinning were only 1.5 percent short of the third decade's harvest request, inventories had to be cut back to minimum harvest ages. NIPF harvest levels were sustained in TRIM throughout the planning horizon. TRIM estimated that future inventories will drop until 2007, when they begin to recover from initially high harvest levels; whereas, TRAS shows inventories that drop sharply throughout the 50-year period. The timber outlook is estimated to be one of sharply falling harvest volume on forest industry land, while NIPF lands maintain a steady, but much lower, harvest. Initial drops in inventory volume recover to levels similar to the 1977 inventory, although stands will become progressively younger. Washington dominates the region's harvest in the first decade, accounting for approximately 60-62 percent of harvest volume, but Oregon will show the largest harvest volume by 1997 (51-55 percent). Washington should again be harvesting the majority of volume by 2027; however, the state's harvest percentage will be slightly lower than the 1977 level with only 53-58 percent.
Resource Type
Date Available
Date Issued
Degree Level
Degree Name
Degree Field
Degree Grantor
Commencement Year
Advisor
Academic Affiliation
Non-Academic Affiliation
Subject
Rights Statement
Language
Digitization Specifications
  • Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0.82 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 B&W), using Capture Perfect 3.0.82, on a Canon DR-9080C. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
Replaces
Additional Information
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2009-10-13T18:07:30Z (GMT) No. of bitstreams: 1 FlickDennisD1984.pdf: 497211 bytes, checksum: 1a483d82497a23b1afd5caa569d6bc41 (MD5)
  • description.provenance : Submitted by Joe Nguyen (jnscanner@gmail.com) on 2009-10-12T22:30:54Z No. of bitstreams: 1 FlickDennisD1984.pdf: 497211 bytes, checksum: 1a483d82497a23b1afd5caa569d6bc41 (MD5)
  • description.provenance : Made available in DSpace on 2009-10-13T18:07:30Z (GMT). No. of bitstreams: 1 FlickDennisD1984.pdf: 497211 bytes, checksum: 1a483d82497a23b1afd5caa569d6bc41 (MD5)
  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2009-10-13T18:04:17Z (GMT) No. of bitstreams: 1 FlickDennisD1984.pdf: 497211 bytes, checksum: 1a483d82497a23b1afd5caa569d6bc41 (MD5)

Relationships

Parents:

This work has no parents.

In Collection:

Items