ENGINEERING IN RAINWATER MANAGEMENT

BEST PRACTICES FOR A SUSTAINABLE RAINWATER MANAGEMENT

Green Tech 2012 GREEN MARINE / ALLIANCE VERTE

30 mai 2012

GÉNIE CIVIL & DÉVELOPPEMENT DURABLE CIVIL ENGINEERING & SUSTAINABLE DESIGN 1751, rue Richardson, bureau 8.230 Montréal (Québec) H3K 1G6 T. (514) 759-‐4792 info@vinciconsultants.com www.vinciconsultants.com

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I-STORMWATER MANAGEMENT AS SUPPORT BETWEEN CITIES AND HARBORS II-STORMWATER MANAGEMENT ISSUES IIII-SUGGESTED SOLUTIONS FOR A SUSTAINABLE MANAGEMENT OF RAINWATER IV-ECONOMIC, ENVIRONMENTAL AND SOCIAL BENEFITS

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BEST PRACTICES FOR A SUSTAINABLE RAINWATER MANAGEMENT

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I-STORMWATER MANAGEMENT AS SUPPORT BETWEEN CITIES AND HARBORS

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PORT DE COMMERCE DE LORIENT (France)

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CIT

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PORT OF MONTREAL

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PORT OF VANCOUVER / PORT OF NEW YORK – NEW JERSEY

CIT

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PORT DE COMMERCE DE CALAIS (France)

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CIT

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HARBOR DEVELOPMENT

ISSUES

Polluting activities (dust, sounds, waste…)

Heritage Industrial

Vacancy lands

Trafic jam

Lack of coastal access / fenced sites.

Aging sites

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ISSUES AND OPPORTUNITIES ABOUT WATER MANAGEMENT

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ISSUES

External activities : hulls

External storages : minerals, feeds supply…

Large impervious surfaces

Polluted soils by former activities

Obsolescence of sewer and hard management phasing.

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II- STORMWATER MANAGEMENT ISSUES

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URBANIZATION HAS A SIGNIFICANT EFFECT ON THE WATER CYCLE

NATURAL CONTEXT

URBAN CONTEXT

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URBANIZATION AND WATER CYCLE

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URBANIZATION EFFECT ON RUNOFF WATER FLOW

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OVERFLOWED NETWORKS AFTER AN INTENSE RAIN EVENT

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QUALITATIVES ISSUES

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CONTAMINANTS IN STORMWATER AND THEIR ORIGINS

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RUNOFFWATER QUALITY BY SITE ACTIVITY

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HEATING ISLANDS ISSUES

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MIXED WATERS

RIVER

TREATMENT

SPRING WATER 470 L / person/ day

RAIN

50% OF NON SPRING

WATER NEEDS

WASTE WATERS BMP:

Holding and

treatment

WATER CYCLE IN URBANIZED AREA

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III-SUGGESTED SOLUTIONS FOR A SUSTAINABLE MANAGEMENT OF RAINWATER

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METHOD OF WORK

•Analysis of existing site

-Infiltration in groundwater

-Combined or separated

sewer

-Soil decontamination

•Phasing for the

rehabilitation of the site

•Multidisciplinary

teamwork

•Ranking of streets

network

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•MDDEP : Article 32 and new guide for stormwater management

- Encourage the reuse or re infiltration of rainwater

- Demonstrate that after development the flow rate

is not higher than that before the development for

a 2 to100 year frequency rain.

•MUNICIPAL BYLAW (MONTRÉAL) : For any impervious surface greater than 1 000m2 (excluding

streets), is required retention to limit the flow discharged to 35 liters per second per hectare for a 25-year frequency rain

•LEED ND : Net zero outflow for a certain percentage of the annual

volume of rain

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STANDARDS REFERENCES

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• ENVIRONNEMENTAL POLICIES AND LABELS : Net zero outflow for a certain percentage of the annual volume of rain

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EXEMPLES DE TOITURES VÉGÉTALISÉES

Photo : Greenroofs.com Institut de gériatrie de l’Université de Montréal

Toit vert rue Jeanne Mance à Montréal

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DÉBRANCHEMENT DES GOUTTIÈRES

Abbaye cistercienne de st jean de Matha

La Tohu

MEC Longueil

Centre sportif Gatineau

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EXEMPLES DE NOUES PAYSAGÈRES

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COUPES DE RUE TYPIQUES AVEC NOUES

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EXEMPLES DE BIORETENTION

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EXEMPLES DE BIORETENTION

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EXEMPLES DE CANIVEAUX

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COUPES DE RUE TYPIQUES AVEC CANIVEAU

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EXAMPLES OF MULTIFUNCTIONAL DRY PONDS

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EXAMPLES OF FLOODED ACCOMODATIONS

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STORMCEPTOR

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TANKS FOR REUSE

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BASIN PERMANENT WATER

LEVEL

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IV- ECONOMIC, ENVIRONMENTAL AND SOCIAL BENEFITS

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ECONOMIC BENEFITS

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ECONOMIC BENEFITS

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CONVENTIONAL DEVELOPMENT

COST BMP COST

COST DIFFERENCE

PERCENT DIFFERENCE

MEC, Longueuil 70 676,00 $

42402.00 $

28274.00 $

40%

MRC BM, Cowansville

138 787,00 $

56735.00 $

82 052.00 $

59%

Stationnement public,

Montréal 1 529 676,00 $

853716.00 $

675 960.00 $

44%

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ENVIRONMENTAL BENEFITS

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1- Erosion control of construction sites

2- Treatment of first flush (rain under

25mm)

3- Reuse of treated storm water for

non potable water needs

4- Detention of 100 years frequency

rain

5- Reduce heat island effect

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ISSUES OPPORTUNITIES

Polluting activities (dust, sounds, waste…)

Measures to minimize impacts and secure acitivites.

Heritage Industrial Conservation measures and enhancement.

Fallow lands / vacancy lands Watch property and phasing of rehabilitation

Trafic jam Organisation of traffic and integration of the alternative ways of circulation.

Lack of coastal access / fenced sites. Make accessible in some locations : coastal visibility and harbor activities.

Aging sites Bringing mixed activities : businesses, offices, accommodations ...

ECONOMIC AND SOCIAL BENEFITS

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Merci ! Thank you!

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Green Tech 2012