WIDTH 



The width of the water surface was meas- 

 ured to the nearest foot. Protruding rocks, 

 stumps, or logs were included as part of the 

 total width. Whether the channel was at high- 

 or low-water stage at the time of sampling 

 was noted on the form. 



DEPTH 



Depth was measured to the nearest inch 

 at three points along each transect at intervals 

 of one-quarter, one-half, and three-quarters of 

 the distance across each channel. For ex- 

 ample, if channel width was 20 feet, depth 



■ The hi^h-uater mark a as identijied by debris, 

 water marks on cegetation and rocks, or any other 

 evidence that the iiater level had been higher than 

 uas found during the visit to the sample. If no such 

 evidence uas found, the uater level uas noted as 

 being at the high-uater stage. 



measurements were made at 5, 10, and 15 

 feet from one bank. The three depth readings 

 and their average were recorded on the form. 



POOLS AND RIFFLES 



Two classes of water surface were recog- 

 nized — pools and riffles. In general, those 

 parts of the channel where the water flowed 

 more slowly and was deeper than in surround- 

 ing portions were called pools. Conversely, 

 the faster moving, more shallow portions were 

 called riffles. Pools and riffles usually were 

 intermixed along a single transect. 



Recognition of pool area is somewhat sub- 

 jective: thus the field crews needed training 

 to make comparable estimates. The obvious 

 pool situations, such as impoundments behind 

 beaver dams or other obstructions, were easily 

 recognized. Other pools, such as the small 



STREAM SAMPLE RECORD 



Drainage Unit No Field Crew 



Sample No. Date 



Photo No 







Z 



u 

 c 

 



Cticinnel No 



Total width 



i 

 n 



Pool width 





Vegefa'ive 

 bank 

 cover 



5 -5 



Stream 

 chonnei 

 deoth 



? 



t 

 < 



Pool quoti'y 



Bo'tQi-i T-o'e"ol 





-2 



= 3 



- 4 



- 5 



B 



S 



G 



S S 



c 





B 



O 



5 



-J 



A 



B 



r 



Av 









No of banks 



Inches 



Pccent 

































































































































































































































































































































































Tote 

 -J 



1 

















































Figure 4. — Shown above is the record form used in the study. 



5 



