Hydrology Precipitation Analysis

I need help with those questions. The book we use is Hydrologic Analysis and Design 4th Ed. Prentice Hall Inc., Englewood. Fiqure 2-4 is the provided one in next page, 4-4. See attachments
hk_3datas18.xlsx

hk_3_s18.pdf

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Intensity
(in/h)
4.00
Depth
(in)
2.00
7.20
3.20
8.00
Duration Frequency
(h)
(yr)
18.00
3.00
4.00
0.17
2.00
Gage
A
1
2
3
Storm
Depth
(in)
?
1.4
1.5
2.3
Average
Annual
(in)
18
12.9
14.8
35.2
DX (E-W)
Gage
(miles)
1
2
3
4
5
6
7
8
3
10
7
5
-10
-7
-13
-9
DY (N-S)
(miles)
11
5
-5
-9
-12
-8
7
8
Precip
(inches)
0.8
1.1
1.3
1.6
3.6
3.2
2.1
1.7
Year
A
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
45.1
48.4
39.6
40.7
44
42.9
38.5
37.4
39.6
46.2
47.3
41.8
47.3
49.5
46.2
41.8
B
C
Precipitation (in)
33.3
39.9
36.9
41.8
29.7
38
32.4
38
34.2
40.9
35.1
41.8
27.9
34.2
27.9
34.2
27
36.1
33.3
40.9
35.1
39.9
32.4
38
35.1
43.7
36
42.8
36.9
40.9
31.5
35.2
X
45.2
48.3
42
44.1
47.3
45.2
38.9
39.9
38.9
48.3
42
37.8
41
44.1
39.9
35.7
Type II
Dimensionless
Cumulative
Time
Depth
(hr)
0
0
0.5
0.0053
1
0.0108
1.5
0.0164
2
0.0223
2.5
0.0284
3
0.0347
3.5
0.0414
4
0.0483
4.5
0.0555
5
0.0632
5.5
0.0712
6
0.0797
6.5
0.0887
7
0.0984
7.5
0.1089
8
0.1203
8.5
0.1328
9
0.1487
9.5
0.1625
10
0.1808
10.5
0.2042
11
0.2351
11.5
0.2833
12
0.6632
12.5
0.7351
13
0.7724
13.5
0.7989
14
0.8197
14.5
0.838
15
0.8538
15.5
0.8676
16
0.8801
16.5
0.8914
17
0.9019
17.5
0.9115
18
0.9206
18.5
0.9291
19
0.9371
19.5
0.9446
20
0.9519
20.5
0.9588
21
0.9653
21.5
22
22.5
23
23.5
24
0.9717
0.9777
0.9836
0.9892
0.9947
1
ECIV 331 ? Spring 2018
Homework Assignment # 3
Precipitation Analysis and Design
Due: Thursday February 8, 2018
Data for the following problems is found in the file HK#3DataS18.xlsx on D2L. Sheet names
correspond to problem numbers. Some of the problems require the use of an IDF curve for
Baltimore Maryland, which is Figure 2.4 in McCuen?s text, but is also reproduced on the next
page.
1) Fill in the missing values in the table on Sheet 1 using the IDF curve for Baltimore.
2) Estimate the rainfall a gage A using both the Station Average and Normal Ratio Methods
utilizing the data provided on Sheet 2.
3) Data for measured precipitation depths at specific coordinates are provided on Sheet 3.
Estimate the depth at a point centered on the origin using the Quadrant Method.
4) Measured annual rainfall depths at several stations are provided on Sheet 4. The gage labeled
X was moved to a new nearby location at the beginning of 2003. Determine whether gage X has
remained consistent with the surrounding gages before and after the move. If there is an
inconsistency, adjust the newer records to be consistent with the old records.
5) Using the Alternating Block Design method outlined in class and described in McCuen?s
Example 2.16, determine the 25 yr 6 h design storm sequence for Baltimore. Use one hour time
increments. Express answers using three options, the cumulative design storm, the incremental
intensities in each one hour time interval and the cumulative design storm in dimensionless units.
6) The NOAA Atlas #2 Volume 1 value for 10 yr, 24 h precipitation depth in Bozeman is 1.85
inches. On 0.5 h intervals, calculate cumulative depth, incremental depth (in each 0.5 h interval)
and incremental intensity (in each 0.5 h interval) using the appropriate SCS storm sequence. Plot
the answers on separate graphs. Tabular values for the design storm sequence shown on Sheet 6
and in McCuen?s Table 2.11. The storm sequence is also shown graphically in Figure 2.15.

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