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WSP10790
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Last modified
1/26/2010 3:14:43 PM
Creation date
10/12/2006 4:32:02 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8507
Description
Rio Grande Project
State
CO
Basin
Rio Grande
Date
7/1/1994
Title
Rio Grande National Forest Analysis of the Management Situation part 1
Water Supply Pro - Doc Type
Report/Study
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<br />'i:l <br /> <br />Management Situation by Revision Topic <br /> <br />~) <br /> <br />V~trtation <br /> <br />The present dominant vegetation <br />cover-type composition is <br />summarized in Figure 11I-2. For the <br />RGNF the predominant forested <br />overstory vegetation is Engelmann <br />spruce/subalpine fir, followed by <br />aspen, and Douglas-fir. <br /> <br />Cover Type Composition <br /> <br /> <br />The potential natural vegetation <br />(PNV) has been identified for the <br />Forest and gr-ouped into broad <br />categories called landtype <br />, Associations (see the discussion on <br />the National Hierarchy of Figure 11I-2. Cover-Type Composition <br />Ecological land Units presented <br />earlier). landtype associations were previously called ecological land unit associations (ELUA's). <br />Figure 111-3 shows the compositi9n of landtype associations on the RGNF. <br /> <br />Table 11I-4 shows the <br />age-class distribution <br />within some selected <br />forest-cover types. The <br />percentage of land area <br />within each cover type is <br />provided for aspen, <br />ponderosa pine, <br />Douglas-fir, lodgepole pine, and Engelmann spruce-subalpine fir. The percentages are additive to <br />100 percent down each column, by cover type. Most of the aspen is around 100 years old, most <br />of the ponderosa pine and Douglas-fir are in the 96 to 185 age classes, most of the lodgepole <br />pine is in the 96 to 155 age classes, and the sprucelfir is clustered around the 126 to 215 age <br />classes. It should be noted that each age-class category represents an average age. Stands of <br />trees categorized in a particular age class may have younger or older individual trees present. <br /> <br />LImber PI."-0.2 <br />Nonfore.telflffock:. 7.-W" <br />Lodgepole Pine 1.7'" <br /> <br />1,lstlecon. Pine 1.'''' <br /> <br />?" <br /> <br />Landtype Associatiorts <br /> <br />Englemann Spruce (Mtn) 47.3'ft <br /> <br /> <br />Aspen 2.1 <br />Nanv.getlted 2.5 <br /> <br />Imb.1 Oat O.19ft <br />ouglls-flr 4.9" <br /> <br />Ponderosl Pine 5.6'" <br />Sedges 3.." <br />Thurber Fescue 5.6" <br />Wo.t.rn ")(M&W'r".~u\'.2'" <br /> <br />" <br />Pinyon Pine 5.3" <br /> <br />lodgepole Pine 13.0" <br />Englemann Spruce (Slides) 2.0" <br /> <br />Figure 11I-3. Landtype Associations <br /> <br />111-15 <br /> <br />,--.<<.-.. <br /> <br />ondo"'" Pin.. 2~t,. <br />orbslShrubI2.5.,. <br /> <br />Dougl..-flr 10.9" <br /> <br />" <br />Pinyon/Juniper 2.'" <br />Aspen 1..3" <br /> <br />While the Forest Plan <br />addressed the mil( of <br />vegetative, composition, <br />it was only at one level -- <br />the forest. The Forest <br />Plan Revision will <br />consider the desired <br />composition at several <br />levels: species, <br />community, and <br />landscape. <br /> <br />"'4 8 <br />\...~ i.l" ... <br />
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