CE 4200 Hydrology
Frank T.-C. Tsai
9/16/10
Exam 1
(12:10-1:30pm)
(four problems)
Problem 1 (25 points)
A rainfall record contains 59 years of measurements. The annual-maximum rainfall amounts (in
inches) of 5 min, 15 min, and 30 min are ranked in the foll
CE 4200 Hydrology
Frank T.-C. Tsai
Due: 9/11/12
Quiz 2
Name:
An eight-year rainfall record measured the rainfall increments at 10-minute intervals, and the top
five rainfall increments (annual series) are as follows:
Rank
10-min rainfall (mm)
1
39.6
2
39.
CE 4200 Hydrology
Frank T.-C. Tsai
Homework #3
Problem 1 Solution:
1
Problem 2 Solution:
In Baton Rouge, Louisiana, 24-hour storms are characterized by Type III rainfall, and the
hyetograph is determined by multiplying the ordinates of the Type III hyetog
CE 4200 Hydrology
Frank T.-C. Tsai
Homework #2 Solution
Problem 1:
Solution
For each time interval there are n = 50 ranked rainfall amounts of annual maxima. The
relationship between the rank, m, and the return period, T, is given by Weibull formula:
T =
CE 4200 Hydrology
Frank T.-C. Tsai
Homework #1 Solution
Problem 1:
Solution
(1) Storage at the beginning of August (or end of July):
S July S Jan (3 5
30) (6 8
20)
S July 60 59 65 S July 54
(2) Storage at the end of August
S Aug S July 15 13
S July 54
CE 4200 Hydrology
Frank T.-C. Tsai
Homework #9 Solution
Problem 1 Solution:
2
2
x2 x2 e y 1 302 1522 e y 1 y 0.195 .
x e
(y
2
y
2
)
152 e
2
( y 0.195 )
2
y 5.00 .
For T=100 years, the exceedance probability is 0.01. The cumulative probability is 0
Return Blue Book and question sheet(s)
CE 4200 Hydrology
Frank T.-C. Tsai
10/22/2015
9:00-10:20am
Exam 2
(5 problems, 100 points)
Problem 1 (20 points)
The storage capacity of a forest canopy covering a catchment is 9 mm, the leaf-area index is 8,
and the
Return Blue Book and question sheet(s)
CE 4200 Hydrology
Frank T.-C. Tsai
9/15/15
9:00-10:20 am
Exam 1
(4 problems, 100 points)
Problem 1 (25 points)
Hydrologic data over a 2-year period (1986-1987) for a mountain basin containing a lake are given
in the
CE 4200 Hydrology
Frank T.-C. Tsai
Homework #2 Solution
Problem 1:
Solution
For each time interval there are n = 50 ranked rainfall amounts of annual maxima. The
relationship between the rank, m, and the return period, T, is given by Weibull formula:
T =
CE 4200 Hydrology
Frank T.-C. Tsai
Homework #4
Problem 1 Solution:
0-20 min:
P=20 mm/h*20min*1h/60min=6.67 mm
P
6.67
I S 1 e S KEt 9(1 e 9 ) 8(0.5)(20) / 60 6.04 mm
20-40 min:
P=50 mm/h*20min*1h/60min=16.67 mm
P
16.67
I S 1 e S KEt 9(1 e 9 ) 8(0.5)(20
CE 4200 Hydrology
Frank T.-C. Tsai
Homework #3
Problem 1 Solution:
1
Problem 2 Solution:
In Baton Rouge, Louisiana, 24-hour storms are characterized by Type III rainfall, and the
hyetograph is determined by multiplying the ordinates of the Type III hyetog
CE 4200 Hydrology
Frank T.-C. Tsai
Homework #1 Solution
Problem 1:
Solution
S = 2120 km3
Q = 44700 km3/yr
Tr=2120 km3/44700 km3/yr = 0.0474 yr = 17.3 days.
Problem 2:
Solution
(1) Storage at the beginning of August (or end of July):
S July S Jan (3 5
30)
CE 4200 Hydrology
Frank T.-C. Tsai
Due: 9/6/12
Quiz 1
Name:
Compute the constant draft (ft3/day) from a 1200-acre reservoir for 30-day period during which
the reservoir level dropped 2 ft despite an average upstream inflow of 25 ft3/s. During the period,