Post on 12-Jan-2016
1
Study of the case “La Riereta”Urban Drainage basin
Team 1 Maximiliano Cavenaghi
Kattia Arnez FerrelDiego Alves Melo
Jorge MaregaRamiro Marcus
2
MethodologyDelimitation and discretization of study
area.Determination of hydraulic parameters.Determination of effective rainfall.Obtaining the storm design.Modelation with the SWMM program.Modification to the drainage system.
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Study Area- “La Riereta”BasinTotal area: 17.99
HectaresHigh percentage of
impervious areasCombined sewer
systemCircular Sections Concrete
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Discretization of basin
Total Sub basins: 18
Basin Roughness: 0.0015
Conduit Roughness: 0.01
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Calibration Fidel eventDetermination of effective rainfall
PT=PE+PP
For the cablibration the N impervious was changed to 0.0015 and also the time steps.
00:00 01:12 02:24 03:36 04:48 06:00 07:120
0.05
0.1
0.15
0.2
0.25
0.3
0.35
obscal
Time (Hour)
Flo
w (
m3/
s)
FIDEL
FlowQp tp
[m3/s] [hour]Measure
d 0.21 01:13Calculat
ed 0.31 02:25Er [%] 46 99
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Validation Jordi and Martina EventJordi Event Martina event
23:45 00:14 00:43 01:12 01:40 02:09 02:38 03:07 03:360
0.2
0.4
0.6
0.8
1
1.2Obs
Cal
Time [Hour]
Flo
w [
m3/
s]
23:45 00:14 00:43 01:12 01:40 02:09 02:38 03:07 03:360
0.05
0.1
0.15
0.2
0.25
0.3
0.35ObsCal
Time [Hour]
Flo
w [
m3/
s]
JORDI
FlowQp tp
[m3/s] [h:min]Measure
d 1.01 01:09Calculat
ed 0.94 01:10Er [%] -7 1
MARTINA
FlowQp tp
[m3/s] [h:min]Measure
d 0.16 01:32Calculat
ed 0.29 01:30Er [%] 81 -2
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Design TormentT= 10
AñosD= 1
Hora
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Problems in the drainage system
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Problems in the drainage system
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Solution Proposal
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Solution ProposalTiempo de inundación N-31 15 minTiempo de inundación N-33 55 min
Tiempo de inundación N-31 1 minTiempo de inundación N-33 1 min
Area 1
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Solution ProposalFlooding time:12 min Flooding time:1 min
Area 2
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Solution ProposalTiempo de inundación 5 min
Tiempo de inundación 2 minArea 3
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ConclusionFlooding succesfully controlled with the
proposed alternatives.New drainage system larger and more
expensive than the current system.Spots with flooding ocurring for a minimum
timeIntegration of various techniques in order to
minimize costs and impacts of drainage works in urban areas