stream temperature - We took stream temperature in a 

 representative portion of the stream, usually where we measured 

 stream flow. 



stream width and flow - We measured stream width (actual 

 water width not channel width) and flow in representative 

 portions of the streams. Adapting a Robbins and Crawford (1954) 

 method, we determined an approximate stream flow in cubic feet 

 per second (cfs) . We first measured a cross section of the 

 stream and divided it into three equal segments. At the midpoint 

 of each segment we measured water depth, and surface velocity; 

 determined by the amount of time a fishing bobber travels 5 ft. 

 Using the following formula we calculated stream flow in cfs: 



R= WDaV 



where R = stream flow volume of segment 



W = width of segment in ft 



D = depth in ft taken at mid point of segment 



a = bottom factor constant of . 8 



V = surface velocity of segment. 

 Total stream flow was then determined by summing the values of R. 



Additionally, we collected historic sighting information and 

 gathered other local sightings of harlequin ducks. As the 

 opportunity arose we made informational contacts with 

 recreationists, outfitters, and local establishments and 

 continued to distribute sighting posters (Appendix B) . 



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