PROJECT DESCRIPTION: REHABILITATION PROPOSALS APPLIED …
Transcript of PROJECT DESCRIPTION: REHABILITATION PROPOSALS APPLIED …
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PROJECT DESCRIPTION: REHABILITATION PROPOSALS APPLIED ON AN URBAN CATCHMENT MODEL, USING SWMM 5 AS MODELING TOOL
Rodrigo Concha JopiaFLUMEN Research GroupTechnical University of CataloniaBarcelona TECH
Julio de 2012 - Santa Fé, Argentina
CONTENT
Project description
Description of the La Riereta urban catchment
Topographic data
Rainfall and flow registered data
Introduction to SWMM 5
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PROJECT DESCRIPTION
MAIN OBJECTIVE: to make a specified study on the La Riereta urban catchment using SWMM 5 as modeling tool.
PROJECT DESCRIPTION
In order to complete this project, there will be different teams.
Specified objectives
to build a numerical model of La Riereta (common task for all teams)
to perform an analysis of La Riereta model considering a specified design storm (specific task for every team)
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PROJECT DESCRIPTION
COMMON TASK: to build a numerical model of La Riereta urban catchment
Discretization on several subcatchment
Determination of initial values for hydrologic and hydraulics parameter (subcatchment width, surface roughness, conduits roughness and so on)
Calibration and validation process
Modeling and analysis of your model under a T=10 years design storm
PROJECT DESCRIPTION
SPECIFIC TASKS: once the model has been done, each team must perform a specific task
Sewer network rehabilitation proposal modifying the network (change on sewer cross sections, sewer bottom slopes, etc) but plan layout can not be changed
Sewer network rehabilitation proposal using detention tanks
Application of SUDS (Sustainable Urban Drainage Systems) in order to decrease surface imperviousness index
Network analysis under a long-continue simulation
Sewer network security levels to avoid flooding and surcharge flow
Sewer network analysis only under Dry Weather Flows
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SpainSant Boi de Llobregat
La Riereta urban catchment
Located in Sant Boi de Llobregat, city near to Barcelona (Spain)
CHARACTERISTICS OF SANT BOI DE LLOBREGAT CITY
Sant Boi de Llobregat, city of the metropolitan area of Barcelona
Population: 80000 inhabitants
Mediterranean weather
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FLOOD PROBLEMS IN SANT BOI DE LLOBREGAT
Zone in the old town, with flood problems
MORPHOLOGY OF THE TERRITORY
•Deltaic zone of the Llobregat, near the river mouth, close to the foothills of the Garraf mountains
Barcelona
Llobregat river
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HYDROLOGICAL CHARACTERISTICS OF LA RIERETA CATCHMENT
Total area: 17 Ha approx
Surface slopes of 7 % to 1 %
Very impervioussurface
Llobregat river
LA RIERETA: MAIN COMBINED SEWERNETWORK
Catchment boundary
Flow measurementpoint
Rainfall measurement point
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TOPOGRAPHICAL DATA
TOPOGRAPHICAL DATA
Raw topographical data contained in a CAD file:- Manholes rim and invert elevations (not at all)- Conduits cross sections
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RAINFALL REGISTERED DATA
Pluviometer
• Model Campbell Scientific ARG-100
• Record of the intensities and of the total rain
FLOW MEASUREMENT
Velocity measurement, v, with sensor of electromagnetic type
Level measurement, y, by means of a piezoresistive sensor
Q = v x A (y)Q = wealth
V = speed happens
A = area
Band of assembly(montage)
Sensor
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CALIBRATION OF THE FLOWMETER IN SITU
FIELD INFORMATION OBTAINED
Measurements of rain and flow in significant events
Selection of the rain events, in agreement with the Manual Sewer Rehabilitation (WRc 1994)
Minimal rainfall: 5 mm
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QUALITY ANALYSIS OF THE FIELD DATA
Checking of information associated to hyetogaphs
Scattergraphs of Q/y data
SOME RAINFALL AND FLOW REGISTERED DATA
Jordi
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5
10
15
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25
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Inte
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/h
0.00
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0.40
0.60
0.80
1.00
1.20
1
13
25
37
49
61
73
85
97
10
9
12
1
13
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14
5
15
7
16
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Tiempo (min)
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3/s)
Intensidad Caudal
Martina
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/h
0.00
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0.04
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0.08
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0.12
0.14
0.16
0.18
1
10
19
28
37
46
55
64
73
82
91
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Tiempo (min)
Cau
dal
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3/s)
Intensidad Caudal