1. Point rainfalls due to a storm at several rain-gauge stations in a basin are shown in Fig. 1. Determine the mean areal depth of rainfall over the basin by the isohyetal method. Zone I II III IV V VI Area of basin Isohyetals 6 cm 5.5 cm VI 6 cm WⓇ 7.3 cm 8 cm- 9.6 cm cm 7.1 cm 8.9 cm 8.9 cm O IV Fig. 1 Area (km²) 56 192 420 244 44 58 - 1014 km² 6 cm 7.6 cm III !c@ 5.1 cm 7.2 cm 8 cm 4 cm Ⓒ-Rain gauge stations 5.2 cm II 6 cm Basin boundary Ⓒ3.6 cm 5.6 cm 4 cm
1. Point rainfalls due to a storm at several rain-gauge stations in a basin are shown in Fig. 1. Determine the mean areal depth of rainfall over the basin by the isohyetal method. Zone I II III IV V VI Area of basin Isohyetals 6 cm 5.5 cm VI 6 cm WⓇ 7.3 cm 8 cm- 9.6 cm cm 7.1 cm 8.9 cm 8.9 cm O IV Fig. 1 Area (km²) 56 192 420 244 44 58 - 1014 km² 6 cm 7.6 cm III !c@ 5.1 cm 7.2 cm 8 cm 4 cm Ⓒ-Rain gauge stations 5.2 cm II 6 cm Basin boundary Ⓒ3.6 cm 5.6 cm 4 cm
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:1. Point rainfalls due to a storm at several rain-gauge stations in a basin are shown in Fig. 1.
Determine the mean areal depth of rainfall over the basin by the isohyetal method.
Zone
I
II
III
IV
V
VI
Aren of bnain
6 cm
Isohyetals.
5.5 cm
VI
6 cm
Ⓒ
7.3 cm
O
III
8 cm
do
9.6 cm
10
cm
7.1 cm
8.9 cm
8.9
cm
Ⓒ
IV
Fig. 1
Area (km²)
6 cm
56
192
420
244
44
58
1014 km²
7.6 cm
III
5.1 cm
7.2 cm
8 cm
4 cm
Ⓒ-Rain gauge
stations
5.2 cm
II
-6 cm
Basin boundary
Ⓒ3.6 cm
5.6 cm
4 cm
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