9 
Frictional Resistance in Artificial Waterways 
TABLE 2 
Garland .| 450 | 19.59 | 3.62 | 5.41 | 5.95 | 0.608 | 0.0028 | 131.1 | .0109 
Garland .| 650 | 19.59 | 3.66 | 5.34 | 6.00 | 0.610 | 0.0023 | 142.3 | .0101 
Garland .| 325 | 19.59 | 4.45 | 4.40 | 6.44 | 0.691 | 0.0022 | 112;.5 | .0126 
Minnesota .| 70 | 7.04 | 1.17 | 6.01 | 3.12 | 0.374 | 0.0069 [ 118.1 | .0111 
Minnesota .] 200 | 7.04 | 1,17 | 6.01 | 3.13 | 0.374 | 0.0052 j 136.2 | .0099 
The value of (n) indicated in this class of flumes is o.on. 
GROUP NO. 2. FLUMES ON TANGENTS WITH NO 
IRREGL1LARITIES. All of the flumes of this class upon which 
experiments were conducted, are located upon the King Lateral 
Extension of the Uncompahgre Project, United States Reclama¬ 
tion Service, near Montrose. The flumes are of excellent con¬ 
struction, there being no irregularities in alignment or grade. The 
grade of each being quite heavy, no difficulty was experienced in 
getting the true slope of the water surface. Several cross-sectional 
areas and water surface elevations were taken throughout the 
length of each. The experimental results are given in Table 3, 
upon flumes with semi-circular arcs of 108 inches, 120 inches and 
96 inches respectively. 
TABLE B—HYDRAULIC ELEMENTS IN FLUMES OF GROUP NO. 2. 
Length 
Dis¬ 
Area of 
Mean 
Wetted 
Hydrau¬ 
Slope 
Co¬ 
Co¬ 
Section 
charge 
Wetted 
Veloc - 
Perim¬ 
lic 
feet 
efficient 
efficient 
Tested 
sec-ft. 
Section 
ity ft. 
eter 
Mean 
per 
(c) 
(n) 
feet 
sq. ft. 
per sec. 
lin. ft. 
Radius 
foot 
300.5 
39.19 
7.32 
5.35 
6.S2 
1.072 
0.00386 
83.1 
.0179 
189 
33.30 
5.77 
5.77 
6.30 
0.916 
0.00537 
82.3 
.0177 
635 
23.72 
4.65 
5.10 
5.53 
0.841 
0.00411 
86.6 
.0166 
A mean value of 0.0174 is indicated for this class of flumes. 
GROUP NO. 3. CORRUGATED FLUMES. Experi¬ 
ments were conducted upon the corrugated flumes on the Stewart, 
and Fire Mountain canals near Paonia, in October, 1913. 
A metal flume having a semi-circular arc length of 132 
inches, and a length of 1,745 feet, carried the water of the Stewart 
canal around a steep hillside and contained numerous curves and 
tangents, a portion of which is shown in Plate II. Because of the 
rather poor alignment of tangents, nothing: definite could be done 
