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Stormwater management through Sustainable Urban Drainage Systems: a study in the clima8c context of the Vene8an Plain Bortolini L . 1 , Zanin G. 2 , D’Agos6no V. 1 , Be9ella F. 1 , Borin M. 2 1 Dept. TESAF – 2 Dept. DAFNAE Environment, Sustainable Agriculture and Forest Management Padova 2529 th September 2016
Transcript of Stormwatermanagement throughSustainableUrban ... · Stormwatermanagement throughSustainableUrban...
Stormwater management through Sustainable Urban Drainage Systems: a study in the clima8c context of the
Vene8an Plain
Bortolini L.1, Zanin G.2, D’Agos6no V.1, Be9ella F.1, Borin M.2
1Dept. TESAF – 2Dept. DAFNAE
Environment, Sustainable Agriculture and Forest Management Padova 25-‐29th September 2016
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Stormwater management systems that mimic natural drainage processes to reduce the effect of urbaniza6on on the quality and quan6ty of stormwater runoff
BENEFIT WHAT IT COVERS
Flood risk mangement Impact on people and property
Water quality management Surface water quality improvements to aesthe6cs, health, biodiversity, etc
Groundwater recharge Improved water availability or quality
Pumping wastewater Reduced flow of wastewater to treatment works
Rainwater harves6ng Reduced flows in sewers, pollu6on or dependence on potable water
Trea6ng wastewater Reduced volume of wastewater to treat from combined drainage systems
Climate change adapta6on Improved ability to make incremental changes and adapt infrastructure (no regrets)
SUDS
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SUDS can also deliver addi8onal benefits
BENEFIT WHAT IT COVERS
Biodiversity and ecology Sites of ecological value
Amenity A9rac6veness and desirability of an area
Health and wellbeing Physical, emo6onal, mental health benefits from recrea6on and aesthe6cs
Air quality Impact on health from air pollu6on control
Carbon reduc6on and sequestra6on Opera6onal and embodied carbon reduc6on together with sequestra6on
Economic growth Business, jobs and produc6vity
Tourism A9rac6veness of touris6c sites
Educa6on Enhanced educa6onal opportuni6es
URBAN SPRAWL IN THE VENETO REGION
1983 – 2006
~350 km2
(1.8% of total surface)
SUDS solu6ons
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Two Research projects funded by University of Padova
1. Green structures for runoff control in urban environments
2. In situ sustainable management of stormwater runoff by mean of green roofs: evalua;on of systems suitable for Vene;an Plain
MAIN PURPOSES i) study effect and performance of SUDS in stormwater management within
the climatic context of the Venetian Plain,
ii) evaluate the plant species adaptation to the particular conditions of SUDS
iii) provide students and stakeholders of real and innovative examples of design solutions for stormwater management in urban areas,
iv) establish a reference hotspot from which practitioners and public administrations can obtain information bringing to include these solutions in urban planning as well as in specific public/private designs
Bioreten6on pond
Rain gardens
Green roof microcosms
Bioreten8on pond
• Alisma parviflora (12) • Bacopa caroliniana (24) • Caltha palustris (24) • Iris “Black Gamecock” (20) • Lysimachia punctata (24) • Lythrum salicaria (24) • Mentha aqua:ca (24) • Oenanthe javanica “Flamingo” (24) • Phalaris arundinacea “Picta” (24) • Typha laxmannii (24)
Bioreten8on pond -‐ MATERIAL AND METHODS
Bioreten8on pond -‐ MATERIAL AND METHODS
Bioreten8on pond -‐ MATERIAL AND METHODS
EXCELLENT
INSUFFICIENT
o Typha laxmannii o Bacopa caroliniana o Phalaris arundinacea “Picta” o Mentha aqua6ca* o Caltha palustris o Lysimachia punctata o Oenanthe javanica “Flamingo” o Lythrum salicaria o Alisma parviflora o Iris “Black Gamecock”
* = invasive
Bioreten8on pond -‐ RESULTS
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Bioreten8on pond Sept 2016
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Rain Garden
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Rain garden – MATERIAL AND METHODS
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Rain garden – MATERIAL AND METHODS
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Rain garden – MATERIAL AND METHODS
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Rain garden – MATERIAL AND METHODS
INFILTRATION = (RUNOFF + RAIN) – (ET + OVERFLOW)
ET è es8mated using WUCOLS method (Costello et al., 2000)
ET = ET0 * KL
KL = KS * KD * KMC landscape coefficient
Output volumes Input volumes
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Rain garden – MATERIAL AND METHODS
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Rain garden -‐ RESULTS
High ability to manage stormwater runoff!
% roof drainage area
Roof runoff (L)
Direct rain (L)
Overflow volumes (L) (% of total input)
Evapo-‐transpira8on (% of total input)
Infiltrated volumes
(% roof runoff)
10 42070 8030 950 (2%) 7540 (8%) 41 315 (98%)
15 99770 16380 5780 (0.5%) 9200 (8%) 101 170 (101%)
20 42070 4015 70 (-‐) 3770 (15%) 42 560 (101%)
INFILTRATION = (RUNOFF + RAIN) – (ET + OVERFLOW)
0
10
20
30
40
50
7:26 AM
8:38 AM
9:50 AM
11:02 AM
12:14 PM
1:26 PM
2:38 PM
3:50 PM
5:02 PM
6:14 PM
7:26 PM
8:38 PM
9:50 PM
11:02 PM
12:14 AM
1:26 AM
Soil water con
tent
(%)
centre 10 cm 30 cm 50 cm 70 cm
Depth from the surface
0
10
20
30
40
50
7:26 AM
8:38 AM
9:50 AM
11:02 AM
12:14 PM
1:26 PM
2:38 PM
3:50 PM
5:02 PM
6:14 PM
7:26 PM
8:38 PM
9:50 PM
11:02 PM
12:14 AM
1:26 AM So
il water con
tent
(%)
perimeter 10 cm 30 cm 50 cm 70 cm 90 cm
Depth from the surface
Rain garden -‐ RESULTS
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Rain garden -‐ RESULTS
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Rain garden -‐ RESULTS
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Green roof
Green roofs – MATERIAL AND METHODS
A) Mix Sedum B) Mix Herbaceous perennial C) Mix Suffruticose plants
• Sedum acre • Sedum reflexum • Sedum sexangulare • Sedum album
• Euphorbia cyparissias • Melica ciliata • Potentilla pusilla • Campanula spicata • Bromus erectus
• Dianthus sylvestris • Dianthus carthusianorum • Dianthus hyssopifolius • Clinopodium nepeta • Thymus serpyllum • Anthemis tinctoria • Artemisia alba
Green roofs – MATERIAL AND METHODS
Software Image J
Software MatLab
Green roofs – MATERIAL AND METHODS
Green roofs -‐ Laboratory tests
0
100
200
300
400
500
600
700
800
Runo
ff (m
m)
Cumulated runoff Dec 2015 -‐ Ago 2016
Total RainfallGRAVELSEDUM VU BAERBAC VU BASUFFR VU BASEDUM VU PIERBAC VU PISUFFR VU PISEDUM ZN BAERBAC ZN BASUFFR ZN BASEDUM ZN PIERBAC ZN PISUFFR ZN PI
438 mm
325 mm
Green roofs -‐ RESULTS
Green roofs -‐ RESULTS
0
50
100
150
200
250
300
350
400
450
PREFORMED MINERAL
Runo
ff (m
m)
Drainage/storage layer
***
a b b
0
50
100
150
200
250
300
350
400
450
SEDUM HERBACEOUS SUFFRUTICOSE
Runo
ff (m
m)
*** ns
0
50
100
150
200
250
300
350
400
450
VOLCANIC RECYCLED
Runo
ff (m
m)
Growth medium
a a ab b
0 50
100 150 200 250 300 350 400 450
VOLCANIC RECYCLED
Runo
ff (m
m)
PREFORMED MINERAL
***
Green roofs -‐ RESULTS
***
0 5 10 15 20 25 30 35 40 45 50
VOLCANIC RECYCLED
Coverage (%)
Growth medium
a
b b
0
10
20
30
40
50
60
SEDUM HERBACEOUS SUFFRUTICOSE
Coverage (%
)
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CONCLUSIONS
All the three systems have shown to be interes6ng solu6ons for the sustainable management of urban stormwater runoff Now we hope to have overcome the main problems related to the correct measurements of the data Our research will con6nue!
Stormwater management through Sustainable Urban Drainage Systems: a study in the clima8c context of the
Vene8an Plain
Bortolini L.1, Zanin G.2, D’Agos6no V.1, Be9ella F.1, Borin M.2
1Dept. TESAF – 2Dept. DAFNAE
Environment, Sustainable Agriculture and Forest Management Padova 25-‐29th September 2016
THANK YOU FOR YOUR ATTENTION
