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Abstract: Nutrient export coefficients are estimates of the mass of nitrogen (N) or phosphorus (P) normalized by area and time (e.g., kg/ha/yr). They have been estimated most often for watersheds ranging in size from 102 to 104 hect-ares, and have been recommended as measurements to inform…
Author(s): James D. Wickham, Timothy G. Wade, Kurt H. Riitters, R.V. O’Neill, Jonathan H. Smith, Elizabeth R. Smith, K.B. Jones, A.C. Neale
Keywords: Chesapeake Bay, in-stream nutrient decay, modeling, nitrogen, phosphorus, pollution, watersheds
Source: Landscape Ecology 18:195-208
Year: 2003
There are increasing concerns in the forestry community about global climate change and variability associated with elevated atmospheric CO2. Changes in precipitation and increases in air temperature could impose additional stress on forests during the next century. For a study site in Carteret…
Author(s): Ge Sun, Devendra M. Amatya, Steven G. McNulty, R. Wayne Skaggs, Joseph H. Hughes
Keywords: climate change, drainage, forest hydrology, loblolly Pine, modeling, PnET-II
Source: Journal of The American Water Resources Association, Vol. 36, No. 2, April 2000
Year: 2000
Understanding how ignitions occur is critical for effectively mitigating home fire losses during wildland fires. The threat of life and property losses during wildland fires is a significant issue for Federal, State, and local agencies that have responsibilities involving homes within and adjacent…
Author(s): Jack D. Cohen
Keywords: wildland fires, ignitions, Structure Ignition Assessment Model, SIAM, modeling, residential fire loss mitigation, hazard mapping, fuel management
Source: In: Gonzales-Caban, Armando; Omi, Philip N., technical coordinators. Proceedings of the Symposium on Fire Economics, Planning, and Policy: Bottom Lines; 1999 April 5-9. San Diego, CA. Gen. Tech. Rep. PSW-GTR-173. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. p. 189-195
Year: 1999
About 50 to 80 percent of precipitation in the southeastern United States returns to the atmosphere by evapotranspiration. As evapotranspiration is a major component in the forest water balances, accurately quantifying it is critical to predicting the effects of forest management and global change…
Author(s): Jianbiao Lu, Ge Sun, Steven G. McNulty, Devendra M. Amatya
Keywords: regional evapotranspiration, land use change, forest hydrology, modeling, regression
Source: Journal of the American Water Resources Association, 39(4):887-896
Year: 2003
This paper reports the first phase of a recent effort to evaluate the performance and use of the FVS-SEAPROG vegetation growth model. In this paper, we present our evaluation of SEAPROG’s performance in modeling the growth of even-aged stands regenerated by clearcutting, windthrow, or fire. We…
Author(s): Michael H. McClellan, Frances E. Biles
Keywords: Growth and yield, forest management, growth projection, modeling, southeast Alaska
Source: Res. Pap. PNW-RP-555. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 15 p
Year: 2003
Presents photographs of wildland vegetation appropriate for the 13 fuel models used in mathematical models of fire behavior. Fuel model descriptions include fire behavior associated with each fuel and its physical characteristics. A similarity chart cross-references the 13 fire behavior fuel models…
Author(s): Hal E. Anderson
Keywords: forest fuels, modeling, fire behavior
Source: Gen. Tech. Rep. INT-122. Ogden, Utah: U.S.Department of Agriculture, Forest Service, Intermountain Forest and Range Experiment Station. 22p.
Year: 1982
A decrease in stratospheric ozone may result in a serious threat to plants, since biologically active short-wavelength ultraviolet-B (UV-B 280-320 nm) radiation will increase even with a relatively small decrease in ozone. Numerous investigations have demonstrated that the effect of UV-B…
Author(s): Wei Gao, Richard H. Grant, Gordon M. Heisler, James R. Slusser
Keywords: ultraviolet-B, modeling, maize canopy
Source: Agricultural and Forest Meteorology. 120: 141-151
Year: 2003
Forest Service, university, forest industry, and private consulting representatives presented 65 papers. General topic areas include: land management planning, multicriteria optimization, timber harvest scheduling, geographic information systems, sawmill simulation, timber supply analysis, and…
Author(s): [Compiler]
Keywords: Land management planning, systems analysis, forest management, modeling, natural resource economics
Source: Gen. Tech. Rep. SE-74. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 423 p.
Year: 1991
We developed a Southern Forest Resource Assessment Consortium (SOFAC) in 1994, which is designed to enhance our capabilities to analyze and model the southern forest and timber resources. Southern growth and yield analyses prepared for the RPA via SOFAC indicate that substantial increases in timber…
Author(s): Fredrick Cubbage, Jacek Siry, Steverson Moffat, David N. Wear, Robert Abt
Keywords: timber supply, modeling, NIPFs, management intensity, South
Source: Proceedings of the Society of American Foresters 1998 National Convention, Traverse City, Michigan, Sept. 19-23, 1998
Year: 1998
Simultaneous growth and yield equations were developed for predicting basal area growth and cubic-foot volume growth and yield in thinned stands of yellow-poplar. A joint loss function involving both volume and basal area was used to estimate the coefficients in the system of equations. The…
Author(s): Bruce R. Knoebel, Harold E. Burkhart, Donald E. Beck
Keywords: Liriodendron tulipfera, mensuration, thinning, modeling
Source: Supplement to Forest Science, Vol. 32, No. 2, June 1986
Year: 1986