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Impact of Forest Service Activities on Stream Flow
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Impact of Forest Service Activities on Stream Flow
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Last modified
1/26/2010 4:41:00 PM
Creation date
7/20/2009 11:44:54 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8461.250
Description
Water Issues
State
CO
Basin
South Platte
Water Division
1
Date
5/22/2003
Author
Charles A. Troendle, James M. Nankervis, Laurie S. Porth
Title
Impact of Forest Service Activities on Stream Flow
Water Supply Pro - Doc Type
Report/Study
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I'n,c nd 1e/Nankrrvis/Porth <br />10 <br />8 <br />0 <br />0 <br />0 6 <br />? <br />x <br />? 4 <br />? <br />U 2 <br />a <br />0 <br />Nage 6 <br />1860 1880 1900 1920 1940 1960 1980 1997 2017 <br />¦ Non ? Seed/Sap ¦ Pote ¦ Saw 0 Water Yield ? <br />14 <br />13? <br />d <br />12ID <br />? <br />A <br />11 a <br />? <br />10` <br />9 <br />Fikurr 2. Simulated water yield f6r Ihe pcriud 1860 to 2017 trom Fe?rest Service lands in thr <br />Nurth Platte River f3asin. AIso shown is the estimated di`tributiun of limber site <br />clask;s, hy 20-yrar interval. <br />30 <br />0 25 <br />0 <br />20 <br />v- <br />x 15 <br />? <br />L <br />10 <br />? <br />a 5 <br />0 <br />24 <br />22 <br />20 ; <br />1 <br />18; <br />s <br />16; <br />14 <br />12 <br />Figure 3. Simulated water yield tor the period 1860 to 2017 trum the spruce-tir forrst type on <br />}-orest Service lands in the North f'latte River liasin. Also shc?wn is thc estimatc(l <br />distrihution of timhrr sirr rlasties, b} 20-year intrrval. <br />In cantrast to spruce-tir, the decreak in water yield simulat«i tu havic occurrcd Irc?m the nearlN <br />628,000 acres of Lodgepole pine type during the period ttom 1860 to 1997 is appruxinritek ?.2 <br />arca inchcs, or 115.000 ac:re feet, of wate;r (Figure 5). Only I I Ex;rcrnt ot' the I.uJgcpulr pinc <br />typc: i, protcrted hy a Vb'ildcrness drsignation. Given the history ot'timber harvest in the Nurth <br />I'Iatte Kiver [iasin, and the fact that 56 percent of the I,udgrpule (orest is currentlN rlassifie(l as <br />1860 1880 1900 1920 1940 1960 1980 1997 2017 <br />10 Non 11 Seed/Sap ¦ Pole 0 Saw 0 Water Yield
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