REVIE.WS 



C2r 



The zero of the stream gaging apparatus in Sperbelgraben is 911.08 

 meters above sea level. The streams are of practically the same 

 length in both watersheds — 3,617 and 3,851 feet, respectively, and 

 the gradient is steeper on the forested than on the poorly forested 

 watershed. The visil)le lengths of our streams are 3.400 and 2,300 feet, 

 respectively. The basin of Sperbelgraben is in the form of a long 

 and narrow valley while Rappengraben is more in the nature of a deep 

 kettle-shaped basin. 



Complete meteorological observations were made at two control sta- 

 tions, one in each watershed, and the precipitation was measured at 

 two additional places in each basin, hence the precipitation depends 

 upon measurements at three points in each basin. Streamflow was 

 automatically recorded at each of the two control stations, except 

 during the cold season. The mean temperature and the total pre- 

 cipitation by months is shown in the following table to which has been 

 added, for comparative purposes, similar data for Wagon Wheel 

 Gap, Colo. 



Monthly Mean Temperature and Total Precipitation at Sperbelgraben, 894: 



M\eters. 



[Wagon Wheel Gap, Colo., added for comparison, 2,930 meters] 



Monthly Mean Temperature F° -j 



Sperbelgraben. 



