145

FIGURE 35 Nonogram for the solution of the Manning formula. Obtain values of n from Table 4. To solve for s, align A with Q and read V, align V and n intersecting reference line, align r with reference line intersection, and read s (1 m = 3.28 ft; 1 m = 39.37 in; 1 m2 = 1550 in2; 1 m3/h = 4.4 gpm; 1 m/s = 3.28 ft/s; 1 m/m = 1 ft/ft).

FIGURE 35 Nonogram for the solution of the Manning formula. Obtain values of n from Table 4. To solve for s, align A with Q and read V, align V and n intersecting reference line, align r with reference line intersection, and read s (1 m = 3.28 ft; 1 m = 39.37 in; 1 m2 = 1550 in2; 1 m3/h = 4.4 gpm; 1 m/s = 3.28 ft/s; 1 m/m = 1 ft/ft).

TABLE 4 Values of friction factor n to be used with the Manning Formula in Figure 35

Surface

Rest

Good

Fair

Bad

Uncoated cast iron pipe

Renewable Energy Eco Friendly

Renewable Energy Eco Friendly

Renewable energy is energy that is generated from sunlight, rain, tides, geothermal heat and wind. These sources are naturally and constantly replenished, which is why they are deemed as renewable.

Get My Free Ebook


Post a comment