Toronto s Wet Weather Flow Master Plan

Transcription

1 Toronto s Wet Weather Flow Master Plan 1. The Master Plan 2. The Don And Waterfront Study 3. What the Individual Can Do Wet Weather Flow Management Master Plan 2000 Storm Presentation to Don Mouth Naturalization... Study March Science Fair By W. J. Snodgrass and numerous co-workers The City s WWF Master Plan THE MASTER PLAN Master Plan defines the next steps needed to improve water quality and protect infrastructure WWFMMP PHILOSOPHY Wet weather flow issues to be managed on a watershed basis Preferred Strategy to achieve the ambitious goals of the plan (over years) 25 year Master Plan a list of projects to be implemented over the next 25 years considers priority areas for water quality improvement and address corporate priorities: - Health & Safety (beach water quality, basement flooding, river flooding) - Legislative (combined sewer overflow control: MOE F5-5) - Infrastructure Protection & Renewal - Accommodate Growth - $40 million annually for 25 years (or total of $1 billion) Stormwater Management using a hierarchical approach: - Source Control // Conveyance System // End-of-pipe Source control measures considered first and balanced with the other measures in regards to impacts: - Environmental // Social // Economic 1

2 PUBLIC EDUCATION MANAGEMENT & OPERATIONS PRACTICES Street Cleaning Catchbasin Cleaning SOURCE CONTROLS CONVEYANCE MEASURES Downspout Disconnection Parking Lot Drainage Pocket Wetland Infiltration/Exfiltration Systems Roadside Swales Porous Pavers 2

3 END-OF OF-PIPE TREATMENT STREAM RESTORATION Wet Pond/Wetland Humber Creek Underground Storage Tanks Flow Balancing System Underground Infiltration Basin PHYSICAL IMPACTS DEVELOPMENT - REDEVELOPMENT - RETROFIT LOT LEVEL CONTROLS Surface Flooding Basement Flooding Stream Erosion Impacts on Infrastructure STORMWATER MANAGEMENT WET PONDS 3

4 Central Waterfront Spadina Quay Wetland Central Waterfront Inner Harbour Toronto Islands and Franklin s Wetland Tommy Thompson Park Sheltered Embayments Open Coasts Coastal Wetlands The Don and Waterfront Trunk and CSO Control Study APPENDIX F. Combined Sewer Overflow (CSO) Study Area Geographical Area and EOP Options from WWFMP Being Evaluated Key Facts About the CSO Study Area 4

5 Typical System in Study Area 1 Western Beaches Lower Don River New or Existing Separate Storm Sewer New or Existing Separate Storm Sewer Combined Sewer Residence Residence Combined Sewer CSO Interceptor Combined Sewer Overflow (CSO) Western Beaches Tunnel Tunnel Overflow Tunnel Overflow Tunnel Overflow Tunnel Pumped Discharge Don River Ashbridges Bay Wastewater Treatment Plant Lake Ontario Residual Pockets of Combined System in Study Area 1 Existing Outfalls in Combined Service Area of Study Area 1 5

6 Implementation Plan for Combined Service System of Study Area 1 OVERALL BENEFITS OF 25 YEAR PLAN WATERFRONT WATER QUALITY (E. Coli) EXISTING CONDITIONS 25 YEAR PLAN (# hours exceeding Provincial Water Quality Objective for beach water quality) Wet Weather Flow Management Master Plan WHAT CAN INDIVIDUAL DO Central Thinking Process water flow pathways Redevelopment and Industrial Areas Role of the Individual on their Property Water Conservation Green Development Approaches Pollution Prevention and Pollution Reduction Individual Lot level and human behaviour Allied Efforts water efficiency program green roof 6

7 Typical System in Study Area 1 Combined System Partially Separated System Fully Separated System 7

8 IMPACT OF OF URBANIZATION DEVELOPMENT RELATED STORMWATER MANAGEMENT WET PONDS Greenwood Race Track Redevelopment (Toronto) Woodbine Centre: Rattling Chain (Etobicoke) Greenbelt Drive (North York) Downsview Lands - Don River Valley (North York) LOT LEVEL CONTROLS - commercial/industrial - surface drainage control and/or oil/grit collectors FISRWG, 1998 LANDSAT, 2002 DEVELOPMENT - REDEVELOPMENT - RETROFIT LOT LEVEL CONTROLS STORMWATER MANAGEMENT WET PONDS Prestige Industrial Catchment Bio-filtration in Parking Lot Underground Storage in Parking Lot Additional Trees in Open Areas Oil/Grit Separators in Parking Lot SYSTEMS APPROACH - LOT LEVEL Parking Lot Runoff to Pervious Areas Pervious Pavement in Parking Lot Catchbasin Controls in Parking Lot Rooftop Controls with Infiltration Gallery Rooftop Gardens 8

9 NEW SEWER USE BY-LAW No new connections to storm sewer system permitted Stormwater runoff to be addressed in Pollution Prevention Plans (required by commercial/industrial sectors) More stringent stormwater quality limits Most restrictive by-law in Canada SPILL CONTAINMENT DEVICES - Underground spill containment tanks/devices - Floatables, oils and grit are captured within the devices - Site prioritization based on: spill frequency and outfall accessibility - Require regular inspection & maintenance - New monitoring technology being investigated for early spill warning YOU CAN MAKE A DIFFERENCE HOUSEHOLD STORMWATER Downspout Disconnection Downspout Disconnection Don t let it go down the drain, recycle your rain The problem Stormwater runoff The solution: Disconnect your downspout from the sewer system and re-direct the rain away from the sewer system 9

10 YOU CAN MAKE A DIFFERENCE YOU CAN MAKE A DIFFERENCE Porous Pavement Lot Grading & Rain Gardens YOU CAN MAKE A DIFFERENCE YOU CAN MAKE A DIFFERENCE Pollution Prevention Public Education 10

11 YOU CAN MAKE A DIFFERENCE YOU CAN MAKE A DIFFERENCE Public Education Public Education SPILL CONTAINMENT DEVICES ANNUAL WATER CONSUMPTION - Underground spill containment tanks/devices - Floatables, oils and grit are captured within the devices - Site prioritization based on: spill frequency and outfall accessibility - Require regular inspection & maintenance - New monitoring technology being investigated for early spill warning 2,400 2,200 2,000 1,800 1,600 Water Consumption 2001 (City of Toronto and York Region) 1,400 1,200 Daily Consumption Average Annual Day Transmission Capacity 1,000 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec 11

12 Wet Weather Flow Management Master Plan JUMP IN GET INVOLVED! 12