250 



50 



100 150 



AGE (years) 



200 



250 



300 



(300+) 



Figure 10. --Development of forest soil organic layer in 

 relation to stand age. 



WATERSHED MANAGEMENT RESEARCH 



^ Salmon Stream Studies. --The first comprehensive report on salmon 

 streams and logging was published in 1956i.'. It described the objectives of 

 the study of the effect of logging on salmon spawning streams in Southeast 

 Alaska and summarized study stream information such as climate, streamflow, 

 water temperature, sedimentation, and stream channel change for a period 

 prior to logging. A second report that is nearly completed discusses what has 

 happened in Maybeso Creek, the first of the study streams in which logging has 

 been completed. 



Briefly, the analysis shows that logging in Maybeso Creek has not res\ilted to 

 date in a change in streamflow pattern, or in minimum winter streamflow, 

 summer base flows, and water temperature. 



19 



