catchment presentation lariereta
TRANSCRIPT
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La Riereta catchment:
Description and monitoring of
an urban catchment in the
municipality of Sant Boi de
Llobregat
Rodrigo Concha Jopia
Manuel Gmez Valentn
Grupo Flumen UPC
Barcelona
Content
Description of La Riereta catchment
Topographic data
Rainfall and flow registered data
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SpainSant Boi de Llobregat
LaLa RieretaRiereta urban catchmenturban 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 ofBarcelona
Population:
80000
inhabitants
Mediterranean
weather
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Sant Boi de Llobregat
Flood Problems in Sant Boi de Llobregat
Zone in the old town, with flood problems
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Morphology of the territory
Deltaic zone ofthe Llobregat,
near the river
mouth, close to
the foothills of
the Garraf
mountains
Barcelona
Llobregat river
Hydrological characteristics of La
Riereta catchment
Total area: 18 Ha
Surface slopes of
7 % to 1 %
Very impervious
surface
Llobregat river
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La Riereta: main combined sewer
network
Catchment boundary
Flow measurement
point
Rainfall
measurement point
Topographical data
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Topographical data
Raw topographicaldata contained in aCAD file:
- Manholes rimand invertelevations (not at
all)- Conduits crosssections
Rainfall registered data
Pluviometer Model Campbell
Scientific ARG-100
Record of the
intensities and of
the total rain
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Flow Measurement
Velocity measurement,
v, with sensor of
electromagnetic type
Level measurement, y,
by means of a
piezoresistive sensor
Q = v xA (y)Q =Q = wealthwealthV =V = speedspeed happenshappens
A =A = areaarea
Band of assembly(montage)
Sensor
Model used
Flo-tote (Marsh McBirney)
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Calibration of the flowmeter in situ
Field Information obtained
Measurements of rain and f low 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 informationassociated to hyetogaphs
Scattergraphs ofQ/y data
Rainfall and flow registered data
Jordi
0
5
10
15
20
25
30
35
40
Intensidadmm/h
0.00
0.20
0.40
0.60
0.80
1.00
1.20
113
25
37
49
61
73
85
97
109
121
133
145
157
169
Tiempo (min)
Caudal(m3/s)
Inte ns i da d C au da l
Martina
0
2
4
6
8
10
12
14
16
18
Intensidadmm/h
0.00
0.02
0.04
0.06
0.08
0.10
0.12
0.14
0.16
0.18
110
19
28
37
46
55
64
73
82
91
100
109
118
Tiempo (min)
Caudal(m3/s)
Intensidad Caudal