The wetted perimeter (WETP) computer program was calibrated to field data 

 collected at flows of 13.3, 34.2 and 72.6 cfs. 



The relationship between wetted perimeter and flow for the composite of 

 five riffle cross-sections is shown in Figure 2. A prominent upper inflection 

 point occurs at an approximate flow of 12 cfs. A flow of 12 cfs is therefore 

 recommended for the low flow period of June 16 through May 15. 



For the high flow or snow runoff period of May 16 through June 15, the 

 dominant discharge/channel morphology concept was applied using USGS flow 

 records for the gage on German Gulch (No. 12323500) located 0.5 miles upstream 

 from the mouth. These high flow recommendations are shown in Table 11. 



German Gulch - Below Edward Creek. 



Cross-sectional measurements for use in the wetted perimeter/inflection 

 point method were made in an approximate 30-ft section of German Gulch (SW, 

 NW, SE, Sec. 34, T3N, R10W) located downstream from the confluence of Edward 

 Creek (Figure 1). Five riffle cross-sections were established in this 

 section. The WETP computer program was calibrated to field data collected at 

 flows of 2.7, 9.4 and 25.3 cfs. 



The relationship between wetted perimeter and flow for the composite of 

 five riffle cross-sections is shown in Figure 3. A prominent upper inflection 

 point occurs at an approximate flow of 2.5 cfs. A flow of 2.5 cfs is there- 

 fore recommended for the low flow period of June 16 through May 15. 



Flow recommendations for the higli flow period cannot be derived due to 

 the absence of long-term USGS gage records for this site. 



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