Nothing Special   »   [go: up one dir, main page]
Scribd
Upload
12 views2 pages

Urban Drainage: 20/07/2020 - Advanced Hydrosystems Engineering. End of Course Test

Uploaded by

Sufian Abusnina

This document is an end of course test for an Advanced Hydrosystems Engineering course. It contains 6 questions related to urban drainage, sewer systems, hydrologic modeling, and stormwater management. The test-taker is asked to provide their name and values for variables C1 and C2 to be used in solving the problems.

Copyright:

© All Rights Reserved
Download as PDF, TXT or read online from Scribd
Download as pdf or txt

Urban Drainage: 20/07/2020 - Advanced Hydrosystems Engineering. End of Course Test

Uploaded by

Sufian Abusnina
12 views2 pages
This document is an end of course test for an Advanced Hydrosystems Engineering course. It contains 6 questions related to urban drainage, sewer systems, hydrologic modeling, and stormwater management. The test-taker is asked to provide their name and values for variables C1 and C2 to be used in solving the problems.

Original Title

Test 20-07-2020

Copyright

© © All Rights Reserved

Available Formats

PDF, TXT or read online from Scribd

Did you find this document useful?

Is this content inappropriate?

This document is an end of course test for an Advanced Hydrosystems Engineering course. It contains 6 questions related to urban drainage, sewer systems, hydrologic modeling, and stormwater management. The test-taker is asked to provide their name and values for variables C1 and C2 to be used in solving the problems.

Copyright:

© All Rights Reserved
Download as PDF, TXT or read online from Scribd
Download as pdf or txt
12 views2 pages

Urban Drainage: 20/07/2020 - Advanced Hydrosystems Engineering. End of Course Test

Uploaded by

Sufian Abusnina
This document is an end of course test for an Advanced Hydrosystems Engineering course. It contains 6 questions related to urban drainage, sewer systems, hydrologic modeling, and stormwater management. The test-taker is asked to provide their name and values for variables C1 and C2 to be used in solving the problems.

Copyright:

© All Rights Reserved
Download as PDF, TXT or read online from Scribd
Download as pdf or txt
You are on page 1/ 2

20/07/2020 – Advanced Hydrosystems Engineering.

End of Course Test

URBAN DRAINAGE
1. Please describe the first flush phenomenon with special reference to the difference between pollutant
mass and concentration (including plots), as well as the role of first flush tanks 5p

2. Describe Infiltration and Inflows phenomenon in sewer systems, their differences and consequences
in the short and long term. Please also explain which sewer type (sanitary, storm, combined) are more
sensitive to these phenomena and why 5p

3. Assume a completely pervious surface (i.e. a green field), described by the following Horton
parameters:
IMAX = (40 + C2/2) mm/h;
IMIN = 5 mm/h;
Decay constant = 4
Based on the following rainfall parameters a = 42mm/h; n = 0.35, consider a constant intensity
rainfall event, whose duration is (30 + C1) minutes.
Please determine the net rainfall intensity (Rainfall that does not infiltrate) at the event onset, after 15
minutes and at the end of the event 5p

4. A concrete stormwater conduit (s=0.003; assume a reasonable value for the roughness coefficient)
drains the following catchment: Total area = (65000 + C2*2000) m2; CEQ = 0.65; LMAX = 500 m;
Rainfall parameters: a = (40 + C2/5) mm/h; n = 0.35. Please determine the appropriate pipe’s
diameter, so that 0.5<h/D<0.75 (1st step 2nd iteration = 5p)

5. Making use of the “Method based on rainfall only (R.M.)”, please determine the volume of a
detention tank, to be built at the downstream end of the following catchment:
Total area = 10ha = 100000m2;
CEQ = (0.5+C1/100);
a = (40 + C2/5) mm/h; n = 0.35
Max QOUT allowed = (80+C2) l/s 5p

6. SWMM computes the overland flow by means of the “sheet flow”


equation. Consider the following rectangular subcatchment
(A=12000m2; C=0.8; s=0.01) and rainfall intensity (i = 50+C1
mm/h). Determine the overland travel time (time required to travel
over the subcatch.) in the case of B=60m and of B=120m 5p
s
B
20/07/2020 – Advanced Hydrosystems Engineering. End of Course Test

PLEASE CLEARLY INDICATE YOUR NAME/SURNAME AND THE


RESULTING C1/C2 ASSUMED FOR THE SOLUTION OF THE PROBLEMS
Scala di deflusso per una sezione Circolare
Iniziale
NAME
Iniziale Nome
Nome C1
C1 SURNAME
Cognome C2
C2 Q/Q
Q/QrUF h/D V/V
V/Vr
UF Q/Q
Q/QrUF h/D V/V
V/VrUF

A 1 A 26 0.003 0.025 0.129 0.543 0.525 1.020


B 2 B 25 0.005 0.050 0.257 0.586 0.550 1.039
C 3 C 24
D 4 D 23
0.013 0.075 0.329 0.629 0.575 1.056
E 5 E 22 0.021 0.100 0.401 0.672 0.600 1.072
6 21
NP
F F 0.035 0.125 0.459 0.714 0.625 1.086
G 7 G 20
0.049 0.150 0.517 0.756 0.650 1.099
H 8 H 19
I 9 I 18 0.069 0.175 0.566 0.797 0.675 1.110
J 10 J 17 (C1+C2)/100
0.088 0.200 0.615 0.837 0.700 1.120
K 11 K 16 0.113 0.225 0.658 0.875 0.725 1.127
L 12 L 15
M 13 M 14 0.137 0.250 0.701 0.912 0.750 1.133
N 14 N 13 0.167 0.275 0.739 0.945 0.775 1.137
O 15 O 12 0.196 0.300 0.776 0.977 0.800 1.140
P 16 P 11
Q 17 Q 10 0.230 0.325 0.810 1.004 0.825 1.139
R 18 R 9 0.263 0.350 0.843 1.030 0.850 1.137
S 19 S 8 0.300 0.375 0.873 1.048 0.875 1.131
T 20 T 7
U 21 U 6 0.337 0.400 0.902 1.066 0.900 1.124
V 22 V 5 0.377 0.425 0.928 1.070 0.925 1.110
W 23 W 4 0.416 0.450 0.954 1.074 0.950 1.095
X 24 X 3
Y 25 Y 2 0.458 0.475 0.977 1.037 0.975 1.048
Z 26 Z 1 0.500 0.500 1.000 1.000 1.000 1.000

You might also like