Developing a CCF equation for lodgepole pine .... 2 Source of data 3 Control plots Analysis of data Reliability of CCF as a measure of density Preparation of the height-age data for use Determining true site index Effect of density on dominant height Determining the shape of the height-growth curve ... Determining the combined effects of density and site index on the height-age relationship Testing initial assumption that all plot data were from one population Adjustments of height-growth curves 11 Test of adjusted height-growth curves 13 Field application of site-index curves 16 Literature cited 18

For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprodTo order this and other USGS information products, visit http://store.usgs.gov Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Percentages of general land cover types for 1939, 1973, 1980, 1986, 1992, and 2000 1939; B, 1974; C, 1980; D, 1986; E, 1992; and F, 2000 Percentages of general land cover types for 1939, 1973, 1980, 1986, 1992 1939; B, 1974; C, 1980; D, 1986; E, 1992; and F, 2000 Hydrologic TermsThe hydrologic definitions provided largely are from Langbein andIseri (1960) andPerry (2005). Aannual maximum peak streamflow The maximum instantaneous discharge value measured during a given water year at a streamflow-gaging station. D dischargeDischarge is the volume of water that passes a given location within a given period of time. In its simplest concept, discharge means outflow; therefore, the use of this term is not restricted to course or location, and it can be applied to describe the flow of water from a pipe or a drainage basin.drainage area The drainage area of a stream at a specified location is the area, measured in a horizontal plane, that is enclosed by a drainage divide.drainage basin A part of the surface of the Earth where precipitation runs off into the drainage system, which consists of a surface stream or a body of impounded surface water together with all tributary surface streams and bodies of impounded surface water. F floodAn overflow of water onto or an inundation of lands that are not normally covered by water, and causes or threatens damage. P peak streamflowThe maximum instantaneous discharge of a stream or river at a given location, and usually occurs at or near the time of maximum stage. R runoffThat part of the precipitation, snowmelt, or irrigation water that appears in surface streams, rivers, drains, or sewers. S streamflowThe water discharge that occurs in a natural channel. Although the term "discharge" can be applied to the flow of a canal, the word "streamflow" uniquely describes the discharge in a surface stream course. The term "streamflow" is more general than runoff because streamflow may be applied to discharge whether or not it is affected by diversion or regulation. streamflow-gaging station A site on a stream, lake, reservoir or other body of water where observations and hydrologic data are obtained. The U.S. Geological Survey measures stream discharge at streamflow-gaging stations. W water yearThe continuous 12-month period from...

A vegetation classification based on a combination of concepts and methods developed by Braun-Blanquet and Daubenmire was used to identify 37 tentative forest habitat types on the Gunnison National Forest. Woodland habitat types comprised two series with a total of 3 habitat types, and forest habitat types included nine series with a total of 34 habitat types. A key to identify the habitat types is provided and the management implications associated with each are discussed.Cover Photo.-Subalpine forests near Los Pinos Pass, Gunnison National Forest.

orest vegetation in Wyoming is classified into 9 series, 111 habitat and comnnunity types, and plant communities. The name, location, relative site, successional status, principal tree and understory associates, and the authority are included.