4.1. The storm hydrograph given bellow was measured at a point in a river at 2-hr intervals from an isolated storm of 2-hr duration for a stream with a drainage area of 320 km² Time/hr 0 2 4 6 8 10 14 18 22 26 30 Discharge 20 18 90 250 180 150 100 40 30 15 0 m^3/s (a) Calculate the volume of direct runoff (b) Calculate the depth of effective rainfall (c) derive the 8-h unit hydrograph for the same catchment: [Hint: Use constant base flow of 18 m*/s] 4.2. The 10 highest annual precipitation values from 79 years recorded data provided below. Precipitation 430 450 650 330 30 220 530 50 500 400 $50 560 (mm) Calculate: a) Return period and probability of occurrence within the return period b) Probability of non-exceedance during design period of 50 years c) Annual precipitation corresponding to 25 and 50 years return periods
4.1. The storm hydrograph given bellow was measured at a point in a river at 2-hr intervals from an isolated storm of 2-hr duration for a stream with a drainage area of 320 km² Time/hr 0 2 4 6 8 10 14 18 22 26 30 Discharge 20 18 90 250 180 150 100 40 30 15 0 m^3/s (a) Calculate the volume of direct runoff (b) Calculate the depth of effective rainfall (c) derive the 8-h unit hydrograph for the same catchment: [Hint: Use constant base flow of 18 m*/s] 4.2. The 10 highest annual precipitation values from 79 years recorded data provided below. Precipitation 430 450 650 330 30 220 530 50 500 400 $50 560 (mm) Calculate: a) Return period and probability of occurrence within the return period b) Probability of non-exceedance during design period of 50 years c) Annual precipitation corresponding to 25 and 50 years return periods
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
![4.1. The storm hydrograph given bellow was measured at a point in a river at 2-hr
intervals from an isolated storm of 2-hr duration for a stream with a drainage area
of 320 km²
Time/hr
0
2
4
6
8
10
14
18
22
26 30
Discharge 20
18
90
250
180
150
100
40
30
15
0
m^3/s
(a) Calculate the volume of direct runoff
(b) Calculate the depth of effective rainfall
(c) derive the 8-h unit hydrograph for the same catchment:
[Hint: Use constant base flow of 18 m*/s]
4.2. The 10 highest annual precipitation values from 79 years recorded data provided
below.
Precipitation 430 450 650 330
30 220 530 50
500
400 $50 560
(mm)
Calculate:
a) Return period and probability of occurrence within the return period
b) Probability of non-exceedance during design period of 50 years
c) Annual precipitation corresponding to 25 and 50 years return periods](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F0c4d19fc-6b6a-4027-803c-f447497f335b%2F4fd5bf71-e7cf-4792-b5c1-7944305925d4%2Fwzf5w5g_processed.jpeg&w=3840&q=75)
Transcribed Image Text:4.1. The storm hydrograph given bellow was measured at a point in a river at 2-hr
intervals from an isolated storm of 2-hr duration for a stream with a drainage area
of 320 km²
Time/hr
0
2
4
6
8
10
14
18
22
26 30
Discharge 20
18
90
250
180
150
100
40
30
15
0
m^3/s
(a) Calculate the volume of direct runoff
(b) Calculate the depth of effective rainfall
(c) derive the 8-h unit hydrograph for the same catchment:
[Hint: Use constant base flow of 18 m*/s]
4.2. The 10 highest annual precipitation values from 79 years recorded data provided
below.
Precipitation 430 450 650 330
30 220 530 50
500
400 $50 560
(mm)
Calculate:
a) Return period and probability of occurrence within the return period
b) Probability of non-exceedance during design period of 50 years
c) Annual precipitation corresponding to 25 and 50 years return periods
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