PCWA-L 467.pdf - PCWA Middle Fork American River Project ...
PCWA-L 467.pdf - PCWA Middle Fork American River Project ...
PCWA-L 467.pdf - PCWA Middle Fork American River Project ...
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5 D1SCHARGE-CURRENT-METER METHOD 107<br />
the reel. The sounding cahle is tagged at convenient intervals wjth<br />
streamers of different colored binding tapes, each colored streamer<br />
being a known distance above the current-meter rotor. The use of<br />
these tags in detennining depth is described on page 150.<br />
The advantages of the handline are ease in assembling the equipment<br />
for a discharge measurement and relative eaSe in making discharge<br />
measurements from certain types of bridges. particularly<br />
truss bridges that do not have cantilevered sidewalks. The disadvantages<br />
of the handline are a lesser degree of accuracy in depth determination<br />
than that obtained with a sounding reel, more physical<br />
exertion is required in making the discharge measurement, and the<br />
handline can seldom be used for high-water measurements of large<br />
FIGURE 62._Handline in use from a bndge,
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