Recent Research

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1. Addresses an acknowledged deficiency in the paper "Near-optimal Location of Two Landings on Flat, Uniform Terrain". Formulas and procedures are presented to determine the optimal yarding distances and access road network for two alternative landings on a harvest unit.

Greulich, F.E. (Out for Review). " An Economic Model for Integrated Roading, Yarding and Hauling Operations on Two Alternative Harvest Unit Landings.  Can. J. For. Res. XX(X):xxx-xxx."

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2. The problem of optimally locating two facilities in response to the continuous uniform distribution of demand points across a complex polygonal region is addressed in this paper. The region may be partitioned into subregions each of which display different intensities of demand. Expected total transportation cost, which is to be minimized, is expressed as a quadratic function of travel distance. Two examples are presented, a simple illustrative example of the basic solution procedure being applied, and a complex example more representative of conditions surrounding a forestry related problem. Results are verified with a separately developed program and future research opportunities are explored.

Greulich, F.E. (2012). "Near-optimal Location of Two Landings on Flat, Uniform Terrain" Can. J. For. Res. 42(2):227-237. See also: CJFR.

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Research Publications Listing

Refereed Journals

Can. J. For. Res.

Greulich, F.E. 1989. The calculation of average yarding distance to a centralized landing, given a polygonal mesh approximation of the setting surface. Can. J. For. Res. 19(1):141-144.

Greulich, F.E. 1991. "Optimal landing location on flat, uniform terrain" Can. J. For. Res. 21(5):573-584.


Greulich, F.E. 1994. Turn location parameters for a continuous landing: I. Road tangents. Can. J. For. Res. 24(7):1503-1509.

Greulich, F.E. 1994. Turn location parameters for a continuous landing: II. Circular curves. Can. J. For. Res. 24(7):1510-1515.

Greulich, F.E. 1997. An algorithm for optimal centralized landing location: rectilinear yarding operations on flat uniform terrain. Can. J. For. Res. 27(8):1192-1197.


Greulich, F.E. 2003. Airtanker Initial-Attack: A Spreadsheet-Based Modeling Procedure. Can. J. For. Res. 33(2):232-242.


Greulich, F.E. 2012. "Near-optimal Location of Two Landings on Flat, Uniform Terrain" Can. J. For. Res 42(2):227-237.

For. Sci.

Greulich, F.E. 1980. Average yarding slope and distance on settings of simple geometric shape. For. Sci. 26(2):195-202.

Greulich, F.E. 1987. The quantitative description of cable yarder settings - parameters for the triangular setting with apical landing. For. Sci. 33(3):603-616.


Greulich, F.E. 1997. Optimal economic selection of road design standards for timber harvesting operations - a corrected analytical model. For. Sci. 43(4):589-594.

Greulich, F.E. 2005. Airtanker Flight Distance between Fires: Random Fire Starts on Line Segments. For. Sci. 51(5):460-471.

Greulich, F.E.  2008  "Modeling Airtanker Flight Distance between Concurrent Fires: The Development and Use of Statistical Distribution Parameters" For. Sci. 54(1):47-57.

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Transfer between areas B and C program input data set

INFORMS 2007 Presentation

J. For. Engrg

Greulich, F.E. 1992 "Estimation of turn location parameters for cable settings" J. For. Engrg. 3(2):29-35.

Greulich, F.E. 1994. "Average yarding distance for row thinning of plantations" J. For. Engrg. 6(1):57-60.

Greulich, F.E. 1995. Road network design: optimal economic connection of three horizontal control points on flat, uniform terrain. J. For. Engrg. 7(1):73-82.


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Greulich, F.E. 1999. The barycentric coordinates solution to the optimal road junction problem. J. For. Engrg. 10(1):111-114; 10(2):81.

Other Journals

Zabinsky, Z.B., F.E. Greulich and E.S. Miyata. 1992. A nonlinear programming approach to skidder congestion. ASAE Paper No. 88-7524. Transactions of the ASAE, General Edition, Jan./Feb. 35(1):335-339.

Gara, R.I. and F.E. Greulich 1995. Shipworm (Bankia setacea) activity within the Port of Everett and the Snohomish River Estuary: Defining the problem. For. Chron. 71(2):186-191.


Gara, R.I., F.E. Greulich and Karen Ripley. 1997. Shipworm (Bankia setacea) host selection habitats at the Port of Everett, Washington. Estuaries 20(2):441-449.

Other Publication Outlets

Government Agencies

Greulich, F.E. and William G. O’Regan. 1975. Allocation model for air tanker initial attack in firefighting. USDA, FS Research Note PSW-301. 8 p.

Greulich, F.E. and William G. O’Regan. 1983. Optimum use of air tankers in initial attack: selection, basing and transfer rules. USDA FS Research Paper PSW-163. 8 p.

Martin, R., F. Greulich, D. Baumgartner and D. Hanley. 1985. Timber harvesting alternatives. Washington State University Cooperative Extension Bulletin EB 1316. 26 p. (Superseded: See Greulich, Hanley McNeel and Baumgartner  1999, listed below.)

Santerre, M., D. Hanley and F. Greulich. 1986. Corrugated plastic culverts: an alternative for forest road drainage. Washington State University Cooperative Extension Bulletin EB 1395. 3 p.

Greulich, F.E., D. Hanley, J. McNeel and D. Baumgartner. 1999. A primer for timber harvesting. Washington State University Cooperative Extension Bulletin EB 1316


Greulich, F.E. 1982. "Expected values of some functions of slope and distance on a setting in the shape of a circular sector" In Proceedings of: 5th PNW Skyline Logging Symposium, University of Washington, Jan. 27-28, 1981. D. Burke, C. Mann and P. Schiess (eds.), University of Washington, Seattle, WA. pp. 81-86.

Greulich, F.E. 1985. "Harvesting Economics" In Proceedings of: Forest Transportation Symposium, December 11-13, 1984, Casper, Wyoming. USDA Forest Service, Denver, Colorado. pp. 149-160.

Greulich, F.E. and S.G. Pickford 1991. Yarding distance analysis for cable systems using a digital elevation model. In Proceedings of: S3:04 Subject Area, IUFRO XIX World Congress, Montreal, Canada, 5-11 August, 1990. T.J. Corcoran, P.E. Linehan and S. Liu (eds.), Maine Agricultural Experiment Station Misc. Rpt. 354, Orono pp. 37-48.

Greulich, F.E. 1999. Calculation and use of effective external boundary and related setting parameters in cable yarding production estimation. In Proceedings of: 7th Symposium on Systems Analysis in Forest Resources, Bellaire, MI. May 28-31, 1997. Published as USDA, FS, North Central Forest Experiment Station General Technical Report NC-205. pp 364-370.

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Input File

Greulich, F.E. 2003. "Transportation Networks in Forest Harvesting: Early Development of the Theory" In Proceedings of: S3.04/3.06/3.07 Subject Area, IUFRO International Seminar, Tokyo, Japan. September 28 - October 5, 2002.

IUFRO 2002 Presentation: Research Communication in Network Theory - Some observations and thoughts about its uneven history.

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2nd MS PPShow

Miyata, E., F.E. Greulich, K. Aruga, K. Inoue. "Thinning operations in Japan: Description and modeling" Proceedings of: 13th PNW Skyline Logging Symposium, Corvallis, OR. April 1-6, 2007.


Greulich, F.E. 1975. Modèles de recherche opérationnelle et utilisation d’avions contre les incendies de forêts en Amérique du Nord. La Forêt Privée Française 105:109-112 & 106:92-95, Paris, France.  English Draft.

Fridley, J.L., F.E. Greulich and P. Schiess. 1989. The development of forest engineering. ASAE Paper No. PNR89-110. 11 p.

Fridley, J.L., J.A. Miles and F.E. Greulich. 1992. Development forest engineering and its literature. In: The Literature of Agricultural Engineering. C.W. Hall and W.C. Olsen (eds.) Cornell University Press, Ithaca, N.Y. 432 p.  Early Draft.

Pickford, Stewart, S. Bolton, J. Fridley, F. Greulich and P. Schiess. 1995. "An impact-of-instruction approach to curriculum evaluation." ASAE Paper No. 957668. Presented at: 1995 Annual Meeting of the ASAE, Chicago, Ill. 6p.

Miyata, E., F.E. Greulich and Hisashi Hasegawa. 2005. Forest Fire in the Western United States. Forest 1452:29-37, 1453:19-26. (In Japanese) English Draft

Greulich, E.E.  1995.  A Discussion of: "Accurate polygon centroid computation using ARC/INFO GIS"  Journal of Computing in Civil Engineering 9(1):88-89. Excel Ex.




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