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Estimating Additional Water Yield From Changes in Management of National Forests in the North Platte Basin
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Estimating Additional Water Yield From Changes in Management of National Forests in the North Platte Basin
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Last modified
3/29/2013 2:57:42 PM
Creation date
3/6/2013 10:50:04 AM
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Water Supply Protection
Description
An Independent Report Prepared for the Platte River EIS Office U.S. Department of the Interior Related to Platte River Endangered Species Partnership (aka Platte River Recovery Implementation Program or PRRIP),
State
CO
NE
WY
Basin
North Platte
Water Division
6
Date
5/12/2000
Author
Charles A. Troendle, Matcom Corporation & James M. Nankervis, Blue Mountain Consultants
Title
Estimating Additional Water Yield from Changes in Management of Ntional Forests in the North Platte Bains, Final Report
Water Supply Pro - Doc Type
Report/Study
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20 <br />15 <br />U <br />10 <br />5 <br />U <br />0 <br />0 10 20 30 40 <br />Years Since Treatment <br />Figure 3. Increase in flow from Fool Creek plotted over years after Harvest. <br />Timber harvest on Fool Creek did not result in a significant increase in <br />summer storm peaks, attesting to the assumption that in water limiting <br />systems the late summer precipitation is used on -site with or without over <br />story vegetation (Troendle 1987). <br />Observations made on Fool Creek, as well as other plot studies, at the Fraser <br />Experimental Forest led to the development of a series of sub alpine water <br />balance models that began in the 1970's. The first of these models, <br />MELTMOD, simulated accumulation and melt of snow. This was followed <br />by . the WATBAL model, which incorporated MELTMOD, but in addition <br />simulated a water balance for forest vegetation (Leaf and Brink 1973). The <br />next generation model was LUMOD (Leaf and Alexander 1975), a land use <br />simulator that incorporated output from an even -aged growth and yield <br />model (RMYLD) (Edminster 1978) in the WATBAL model to simulate <br />water yield responses to clear cutting. <br />These early models assumed that clear cutting had the greatest impact upon <br />snow pack accumulation, because at the time it was believed that the <br />measured increase of snow, present in openings following timber harvest, <br />was the result of increased deposition during the snow fall event and <br />redistribution of snow intercepted in the surrounding canopy, between <br />events. This relationship was incorporated in the models as a "Rho" <br />distribution function (see Troendle and Leaf 1980) in which snow retention <br />in the opening (or accumulation) was a factor of opening size. Thus, the <br />6 <br />1 <br />t <br />i <br />I'll <br />t <br />1 <br />1 <br />
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