Laserfiche WebLink
<br />00066E <br /> <br />. <br /> <br />. <br /> <br />.' <br /> <br />Mexico, rhe ,;tlldy Jreil 3spec-( 1>'''5 facing south. The study plots were ]0,300 <br />feet ;11,ove n1.~.1. ,md ]/~ mile frum an II,SOO foot ridge line. Slope:; near <br />the slil<ly plots r"ng.ed from ]S to 2U percent. Prevuiling winds \;ere south- <br />westerly. The sUlTUn;uy Clnd conclusir)ns of the study are: At the time of maxi- <br />mum sno"pack, the .greatest quantities of snow were along the sunny and shady <br />borJers of the cle<<rcut strip. Based upon evidence from other studies, the <br />higher snow catch in the clearing was the result of snow redistrihution from <br />the ;H.lj:Jcent forest interiors. SmnIl patclKuts no greater than 5 to 8 tree- <br />hei:"hts in di,,,"cter wi] 1 prohahly acclnllulate maximuJn quanti ties or snow. <br />Shorter cle;Hin~s would greatly reduce \>,illdspeeds and intensity of hlowing <br />sno\\' events. <br /> <br />It is lnOS! <br />or larger wi II <br />fores t cove r. <br />about the same <br /> <br />probable that snoMllelt rates in clearings one tree-height wide <br />be signi ficantly greater thnn melt rates under surrounding <br />The significantly deeper snow along the shady border melted <br />time 35 the shallower snow in the adjacent forest. <br /> <br />More and earlier water yields should result from forest harvesting in <br />narrow and short clearcut strips and/or small patchcuts because of reduced <br />transportation losses, a greater unit-area concentration of snowmelt water, <br />and a greater year-to-year carryover of soil moisture. <br /> <br />(7) Factors Affecting Snol>melt and Streamflow, conducted in the Fraser Experi- <br />ment Forest, 1946 to 1953. <br /> <br />The experiments made by the U~ S. Bureau of Reclamation and the Forest <br />.Service at the Fraser Experiment Forest at Fraser, Colorado, during the <br />1947-53 period was one of <br /> <br />[continued on next page] <br /> <br />4 <br />