6 For the basin shown in Fig. P 2.23, the normal annual rainfall depths recorded and the isohyetals are given. Determine the optimum number of rain-gauge stations to be established in the basin if it is desired to limit the error in the mean value of rainfall to 10%. Indicate how you are going to distribute the additional rain-gauge stations required if any. What is the percentage accuracy
6 For the basin shown in Fig. P 2.23, the normal annual rainfall depths recorded and the isohyetals are given. Determine the optimum number of rain-gauge stations to be established in the basin if it is desired to limit the error in the mean value of rainfall to 10%. Indicate how you are going to distribute the additional rain-gauge stations required if any. What is the percentage accuracy
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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(Civil engineering hydrology)
Transcribed Image Text:6 For the basin shown in Fig. P 2.23, the normal annual rainfall depths recorded and the isohyetals
are given. Determine the optimum number of rain-gauge stations to be established in the basin
if it is desired to limit the error in the mean value of rainfall to 10%. Indicate how you are going
to distribute the additional rain-gauge stations required if any. What is the percentage accuracy
50 cm
PRECIPITATION
of the exixting network in the estimation of the average depth of rainfall over the basin. The
area between the isohyetals are given below:
Zone:
II
III
Area (Km²):
278
389
I
63
VI
.…..
75 cm
III
OA
60 cm
B
O
92 cm
II
F 86 cm
100
cm
I
68 cm
75 cm
50 cm
IV
220
III
62 cm
D
IV
O
45 cm
&
Scanned with CamScanner
3
V
55
53
VI
Total
33
1038
(16-1, 1, 4, 2, 0, 1; 85.2%)
cm
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