A tank of Fluoroscein dye, with a reported dye concentration of 2.4x104 yg/L, was setto drip into Little ThompsonRiverat a rate of 11 mL/s. Using a fluorometer, the river cross-section was subsequently sampled 240 m downstream (D/S), with the sampling results shown below. (a) Assuming no intervening dye losses, determine the average stream flood discharge in m*/s. (b) Whatis the average flow velocity in this stream reach? (c) Whatis the average flood flow cross-sectional area of this creek? and What are advantages and disadvantages of this measurement method? List at least one of each.
A tank of Fluoroscein dye, with a reported dye concentration of 2.4x104 yg/L, was setto drip into Little ThompsonRiverat a rate of 11 mL/s. Using a fluorometer, the river cross-section was subsequently sampled 240 m downstream (D/S), with the sampling results shown below. (a) Assuming no intervening dye losses, determine the average stream flood discharge in m*/s. (b) Whatis the average flow velocity in this stream reach? (c) Whatis the average flood flow cross-sectional area of this creek? and What are advantages and disadvantages of this measurement method? List at least one of each.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Question
A tank of Fluoroscein dye, with a reported dye concentration of 2.4x104 yg/L, was setto drip into
Little ThompsonRiverat a rate of 11 mL/s. Using a fluorometer, the river cross-section was
subsequently sampled 240 m downstream (D/S), with the sampling results shown below.
(a) Assuming no intervening dye losses, determine the average stream flood discharge in m*/s.
(b) Whatis the average flow velocity in this stream reach?
(c) Whatis the average flood flow cross-sectional area of this creek? and What are advantages and disadvantages of this measurement method? List at least one of each.
Transcribed Image Text:Time
(min:sec)
0:00
4:40
5:00
5:20
5:40
6:00
D/S measured dye
Time
concentration (µg/L) (min:sec)
0.0
0.0
5.3
4.6
4.6
4.6
6:20
6:40
7:00
7:20
7:40
8:00
D/S measured dye
concentration (µg/L)
4.1
3.0
1.8
0.5
0.15
0.0
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