Technical Advisory Meeting. December 13, 2012 Credit Valley Conservation Authority Mississauga, Ontario 1

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1 Supporting Credit Valley Conservation Authority: LID Demonstration Monitoring Projects - Phase II Robert Roseen, PhD, D.WRE, PE Andrew Earles, Ph.D., P.E., D.WRE, CPESC Technical Advisory Meeting December 13, 2012 Credit Valley Conservation Authority Mississauga, Ontario 1

2 Geosyntec and Wright Water Engineers Evaluating the Effectiveness of a National Standard for Stormwater Management International Database on Urban Stormwater BMP Design and Performance Urban Storm Drainage Criteria Manual, Volume 3 Cold Climate: System Scale and Site Scale Monitoring at the UNH Stormwater Center Seattle Public Utilities Green Infrastructure Support and Integrated Planning Urban Stormwater BMP Performance Monitoring Guidance Grant Ranch Water Quality Monitoring, Bow Mar Lake Watershed, Colorado 2

3 To ensure abundant, safe, clean water for environmentally, socially and economically healthy communities Can be achieved through sound science, strong partnerships, and community education. A successful LID monitoring program will contribute largely to addressing the barriers to implementation and Making it Work CVC Vision

4 Barriers to Implementation 4 1. Economic High cost of implementation in tough economic conditions Balanced by LID performance exceeding conventional 2. Education/Planning Barriers Regulation and zoning requirements Building Social Capital Accessing Partner Networks 3. Political or Perception Language/Terminology Misperceptions Age old resistance to regulation 4. Technical Lack of information regarding water quality performance Lack of modern design specs Designer unfamiliarity Challenging Site Conditions Construction Challenges Maintenance misperceptions and practices Cold Climate Performance suspicions 5. Reasonable Doubt Standard of Reasonable Doubt cannot be easily overcome and can stifle innovation For any innovative technology there will be a lighter record of usage Cost to overcome doubt can be unreasonable What we do know is that the current standard of practice will not meet WQ requirements 4

5 Integrated Planning and Triple Bottom Line Analyses 5 What is difference between these outcomes? Plans using Green Infrastructure to reduce reliance on Gray Infrastructure 5

6 Real-World Monitoring and Treatment Trains 6 Treatment train and real world monitoring is needed to understand system function Demonstration projects build understanding and acceptance of practice through partnerships Innovative systems and designs require rigorous field evaluations Field installations Monitoring enables refinement of design and specifications LID systems of today will be different than those of the future 6

7 Cold Climate Functionality Porous asphalt frost penetration Pavem ent Type Anti- Icing Apps. Deicing Apps. Anti - Icing App s. Deici ng Apps. Reductions Possible when compared to DMA with 100% App. Rate App. Rate Average Mass Reductio n* ( 06-08) DMA % 0% PA % 75% 7

8 Maintenance and Long-Term Functionality Long-term performance by category The Maintenance Myth Maintenance Guidance 8

9 Economic Benefits of Green Infrastructure Residential: 6% total cost savings. Avoided use of 1616 of curbing, 785 pipe, 8 catchbasins, 2 detention basins, 2 outlet control structures, 1.3 acres less of land clearing Portland, OR: 43% reduction in capital cost using grey and green New York City: 21% reduction in capital cost. O&M burden shifts to funds available for people in replace of heavy energy demand Commercial: local jobs 26% total cost savings. Avoided use of 15,000 lf of pipe, widespread usage of subsurface chambers through use of porous asphalt ($880,000) gravel wetlands, simplified permitting Other Benefits: Reductions of 33-50% in heating and cooling. 50% reduction in time to sale Increased property values of 12-16%. Incentives and rebates 9

10 LID and Community Resiliency 45% increase in flood flows, 300% increase in developed areas in 45 years feet increase in 100-yr floodplain in 45 years 53% reduction of build-out impacts from current zoning Return Period (Years) NRCC Yr Lamprey River Discharge (CMS) Costs from Presidentially Declared Disasters in NH Damage cost avoidance from Yr Storms Millions of dollars Existing GI Low infiltration soils Low infiltration soils with GI 0 0% 20% 40% 60% 80% 100% Probabilty of exceedence 10

11 Thermal Impacts from Stormwater Management 11 Filtration and infiltration systems on average reducing the summer temperatures and increasing the winter temperatures of the runoff to near the average groundwater temperature. 11

12 International Stormwater BMP Database What is the BMP Database? What does the Database tell us about Low Impact Development (LID) How can the BMP Database benefit CVC s monitoring efforts? 12

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14 Overview Established in 1996 as joint effort between USEPA and American Society of Civil Engineers (ASCE) Urban Water Resources Research Council (UWRRC) Current project sponsors: Water Environment Research Foundation (WERF) ASCE/EWRI USEPA Federal Highway Administration (FHWA) American Public Works Association (APWA) 14

15 Overview (Cont.) Over 500 BMP studies Modified over past 2-3 years to better accommodate LID sites Statistical analysis of BMP performance by category and parameter Data entry spreadsheets Monitoring and data analysis guidance Options for different levels & interests of users 15

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17 Heritage Estates SW Pond Richmond Hill, ON

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24 How does CVC data compare?

25 Questions and Discussion 25

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