CONTENTS 



Page 



INTRODUCTION 1 



STUDY METHODS " 2 



EXPERIMENTAL RESULTS 8 



DISCUSSION 14 



Conclusions 16 



LITERATURE CITED 17 



ABSTRACT 



In the northern Rocky Mountains, in Idaho, data collected 

 during three winters demonstrate why there is always less snow 

 beneath the canopy of a cedar-hemlock forest than in the adjacent 

 small openings. The author presents as evidence the differential 

 release of water, which originates in the canopy as throughfall- 

 drip, thus accounting for part of the deficiency in snow water 

 equivalent beneath the canopy by April 1. Such informative data 

 were made possible by a new instrument designed to collect 

 waterflow from the snowpack. 



