Director, Villanova Urban Stormwater Partnership. Government Academia Industry Pennsylvania Stormwater Management Symposium

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1 2003 Pennsylvania Stormwater Management Symposium Implementing Stormwater Management Integration of Planning, Regulation, Design, and Operations Robert G. Traver, Ph.D., PE Symposium Chair Department of Civil and Environmental Engineering Director, 1 Mission Statement The purpose of the symposium is to advance the knowledge and understanding of comprehensive stormwater management for those dealing in all aspects of planning, design, implementation and regulatory compliance. A half day workshop entitled Removing Obstacles to Better Stormwater Management a workshop for Non- Engineers was held preceding the conference

2 Steering Committee Pennsylvania Department of Environmental Protection Durla Lathia, PE Chief Stormwater Planning and Management Bureau of Watershed Conservation - Steve Burgo, PE and Domenic Rocco, PE- Southeast Regional Office Chester County Conservation District - Dan Greig Chester County Water Resources Authority - Jan Bowers Pennsylvania Environmental Council - Ann Smith Borton Lawson Engineering - Paul DeBarry, PE Philadelphia Water Department - Howard Neukreg, PE Pa -20th Anniversary of Act th Anniversary of Act 167- Future Visions for Municipal Implementation 2001 Pa 2003 Pa - Re-thinking Comprehensive Stormwater Management --Integrating Quality, Volume and Peak Controls- Implementing Stormwater Management Integration of Planning, Regulation, Design, and Operations 2005 Pa???????????????????? 4 2

3 Stormwater Management: Past, Present & Future? Where are we going? 98 Plenary Session 1998 Pennsylvania Stormwater Management Symposium FOCUS Watershed Systems Sustainability --> Water Supply, Natural Systems Peak Flow --> Flooding, Channels Volume --> Groundwater Recharge Quality --> Base Flow, Water Supply, Wastewater Disposal, Natural Systems 6 3

4 1998 Pennsylvania Stormwater Management Symposium DESIGN TOOLS Hydrologic Watershed Models????? Incorporate Quality, Volume, and Peaks? Best Management Practices? Who Develops? Collects and Organizes Data? Geographic Information Systems? Continuous Rainfall??? Pennsylvania Stormwater Management Symposium RESULTS BMP s Distributed Across the Site Retrofitting of Old basins more smaller Wetland Detention Basins smaller storms, higher in the watershed Less impervious More Cluster Owned & Maintained Homeowners Associations Municipal 8 4

5 1998 Pennsylvania Stormwater Management Symposium CONCERNS Tracking of Results? Verification? Effectiveness? Design Standards? Life Cycle? Maintenance / Replacement? Cost? 9 In Summary. NPDES Phase II program will greatly change the focus of Water Resource Professionals! A distributed approach, using BMP s focused on reducing volume, pollution, and peak flows, coordinated on a watershed basis, with long term maintenance programs will be the focus Pa SE

6 Our Design Focus Will Change! Current Peak Flow Focus Act 167 Implementation Future? watershed planning minimizing impervious surfaces / distributed BMP's Best Management Practices required storm volume & nonpoint source pollution & peak flows focus downstream of the project not property line distributed treatment not concentrated 1999 Pa SE 11 Pa Comprehensive Stormwater Policy Protect and maintain stream uses/water quality; Protect, maintain and sustain water quantity; and Integrate federal stormwater management requirements. Best Management Practice (BMP) approach to stormwater management that emphasizes groundwater recharge and the reduction of impacts from discharges to surface water. Site Design Infiltration ANNOUNCED 2001 PA SWM

7 Act 167 Now its Includes NPDES II Requirements Peak, Volume and Quality Pa Comprehensive SWM Policy All problems are solved NOT! 13 EPA Region III Website

8 Focus Current Challenges Watershed Sustainability? How do we tie in stormwater, water supply and TMDL? Stream Channel Protection How much to infiltrate? Design Tools Base flow and Evapotranspiration? Recreate Bankfull? If we over protect smaller storms does that balance out allowing more damage from larger storms? Hydrologic Models Continuous Flow / Quality / Infiltration CONCERNS Tracking of Results? Verification? Effectiveness? Design Standards? Life Cycle? Maintenance / Replacement? Cost? And how did we forget retrofit in developed areas?

9 2003 Pennsylvania Stormwater Management Symposium Implementing Stormwater Management Integration of Planning, Regulation, Design, and Operations Robert G. Traver, Ph.D., PE Symposium Chair Department of Civil and Environmental Engineering Director,