A8 BULLETIN 832, U. 8. DEPARTMENT OF AGRICULTURE. 
TURKEY BRANCH. 
A straight course 200 feet long was selected for slope measurements 
on the Turkey Branch channel just above the Atlantic Coast Line Rail- 
road southwest of Pembroke. This channel is small and was hand- 
dug (Plate XVI fig. 1; and fig. 9 A). At the time of the experiments 
the channel was very uniform i in cross section fora bankful stage; it had 
regular side slopes and was free from growth of any kind. The values — 
of n obtained were only for very low stages. As may be seen from 
Table 5, the average 
maximum depth for 
clas Ba ape 
the channel at bankful 
stage was 5.0 feet, and 
only 0.95 foot for the 
ie highest stage for which 
— B a Laveen nwasdetermined. The 
ik BACK SWAMP SS cross sectional area of 
| ee ae oa a the lower part of the 
Dae AMS AMIZSUSILSUZ ee. 
channel varied consid- 
erably in size (fig. 10 
by 
BACK SWAMP. 
A straight course of 
channel 250 feet in 
length was used for 
slope measurements 
on the Back Swamp 
channel. It was lo- 
cated just west of the 
Sunday Ford Road and 
about 8 miles west of 
~ JTumberton. At the 
time of these meas- 
urements the channel 
Fic. 9.—Average cross sections of channels for experiments in was quite uniform in 
North Carolina. 
cross section, and the 
side slopes were quite regular (fig. 10, B). The side slopes have 
been eroded considerably so as to be fey vertical, leaving a mat 
of overhanging ragged roots on either bank. Owing to a compara- 
tively swift current, there were no weeds, grass, or other vegetation 
on the bottom or side slopes, but there were a number of large tree 
roots in the channel. Plate XVI, figure 2; and figure 9 B, show the 
condition and average cross section of channel, and Table 5 shows 
the values obtained for n. Of the five channels for which experi- 
ments were made, this is the only one where a value of n was determined 
for a near bankful stage. 
