## (Solved) Department of Civil &amp; Environmental Engineering WATER &amp; WASTEWATER ENGINEERING Assignment 1 Uncertainty &amp; Statistical

Using statistical anlysis, assess the variability of the following wastewater montly inflow data (Flow, TSS,COD, COD Load, TSS Load) and discuss the following:

1. Impact of input data variability on design?

2. Which input values would you use in your design and why?

3. Given your chosen design values, how certain are you that your input variables wont be exceeded?

4. Discuss the impact of your choice of design input data on project cost? What compromise are youwilling to make to reduce project cost?

Also determine the following for each parameter:

1. Draw distributions and compare to normal distribution

2. Mean, Median, Mode, Standard Deviation

3. Coefficient of variation

4. Coefficient of Skewness

5. Coefficient of kurtosis

6. Conduct graphical analysis

7. Determine the peak values from graphical analysis

Department of Civil &amp; Environmental Engineering
WATER &amp; WASTEWATER ENGINEERING Assignment 1 Uncertainty &amp; Statistical Analysis of Variable Data
Using statistical anlysis, assess the variability of the following wastewater montly inflow data (Flow, TSS,
1.
2.
3.
4. Time
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18 Impact of input data variability on design?
Which input values would you use in your design and why?
Given your chosen design values, how certain are you that your input variables wont be exceeded?
Discuss the impact of your choice of design input data on project cost? What compromise are you
willing to make to reduce project cost? Q
3914
9637
1849
4258
709
833
6991
8836
5177
8541
1029
5178
4000
4204
3221
6153
5037
7093 TSS
28.9
7.1
53.5
111.4
128.2
9.9
78.8
127.3
117.9
108.0
127.8
21.1
57.8
78.9
20.0
98.0
105.8
83.4 COD
51.9
62.1
76.5
3.1
45.8
175.4
117.1
192.7
233.2
247.2
140.1
64.7
228.8
182.3
67.3
103.3
113.6
207.7 Time
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36 Q
3486
5500
8412
9738
8347
6648
9879
2145
4713
6570
6061
1809
2810
9592
4219
5465
2995
9280 Also determine the following for each parameter:
1. Draw distributions and compare to normal distribution
2. Mean, Median, Mode, Standard Deviation
3. Coefficient of variation
4. Coefficient of Skewness
5. Coefficient of kurtosis
6. Conduct graphical analysis
7. Determine the peak values from graphical analysis TSS
48.1
61.5
17.3
25.5
70.4
59.3
136.0
3.1
139.5
81.9
84.2
36.7
10.7
115.4
44.9
63.5
26.9
135.9 COD
240.1
161.4
129.1
201.2
12.0
35.6
197.0
3.0
62.4
130.5
101.5
19.3
242.9
170.3
84.1
143.7
130.3
145.6

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