METHODS 



Manual and machine methods were used to digitize the original analog rainfall rec- 

 ords. Compilation of the digitized record was done by computer.-^ The final computer 

 output for every storm consisted of both accumulated precipitation depth and rainfall 

 intensity for the following 12 time durations: 2, 5, 10, 15, 20, and 30 minutes and 1, 

 2, 4, 6, 12, and 24 hours. The computer output also included the total precipitation 

 depth for every month as well as a yearly summary of maximum depth and intensity. 



Record Consistency 



All of the records were checked for consistency by double-mass plotting (Searcy and 

 Hardison 1960). This technique was applied to the combined depth records only for July 

 and August because all of the gages were in operation during these 2 months. A three- 

 station preliminary base pattern for each study area was arbitrarily selected to which 

 all other stations were compared. From these comparisons, the three most consistent 

 stations were then chosen as the final base pattern. 



^Appreciation is expressed to Leon Huber and Jack W. Homeyer of Utah State Univer- 

 sity and the Intermountain Forest and Range Experiment Station, respectively. Mr. Huber 

 is author of the computer program PREINT; Mr. Homeyer authored the computer program 

 ANADIG. These programs contributed materially to the completion of this work. 



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