Managing Stormwater Runoff with Green Infrastructure "Enhancing Community Resiliency to the Changing Climate"

Transcription

1 Managing Stormwater Runoff with Green Infrastructure "Enhancing Community Resiliency to the Changing Climate" Presented at Stormwater Management on the Whale Pond Brook Watershed Meeting Christopher C. Obropta, Ph.D., PE Extension Specialist in Water Resources February 18, 2014

2 Rutgers Cooperative Extension Rutgers Cooperative Extension (RCE) helps the diverse population of New Jersey adapt to a rapidly changing society and improves their lives through an educational process that uses sciencebased knowledge.

3 Water Resources Program The Water Resources Program is one of many specialty programs under Rutgers Cooperative Extension. Our Mission is to identify and address community water resources issues using sustainable and practical science-based solutions. The Water Resources Program serves all of New Jersey, working closely with the County Extension Offices.

4 Environmental County Agents The Environmental County Agents teach people new skills and information so they can make better informed decisions and improvements to their businesses and personal lives. Michele Bakacs, Middlesex and Union Pat Rector, Morris and Somerset Amy Rowe, Essex and Passaic Mike Haberland, Camden and Burlington Sal Mangiafico, Salem and Cumberland

5 RCE of Monmouth County Dr. William Sciarappa County Extension Dept. Head, County Agricultural Agent Cooperative Extension of Monmouth County Rutgers New Jersey Agricultural Experiment Station 4000 Kozloski Rd. P.O. Box 5033 Freehold, NJ Phone: ext Fax:

6 History of Stormwater Management

7 1 st Attempt at Stormwater Management Capture all runoff, pipe it, and send it directly to the river...prior to mid 1970 s

8 2 nd Iteration of Stormwater Management Capture runoff, detain it, release it slowly to the river mid 1970 s to 2004 Detain peak flow during large storm events for 18 hours (residential) or 36 hours (commercial) Reduce downstream flooding during major storms Use concrete low flow channels to minimize erosion, reduce standing water, quickly discharge low flows Does not manage runoff from smaller storms allowing stormwater to pass through the system Directly discharges stormwater runoff to nearby stream, waterway, or municipal storm sewer system (at a controlled/managed rate)

9 3 rd Generation of Stormwater Management Reduce peak flows and flooding and. Maintain infiltration and groundwater recharge Reduce pollution discharged to local waterways abc Action News, August 27, 2012

10 How NJ s regulations change the way we manage stormwater Play

11 It is all about controlling runoff from impervious surfaces

12 We must deal with impacts from impervious cover Are there impervious surfaces that you can eliminate? If we can't eliminate it, can we reduce it? If we can't eliminate or reduce it, can we disconnect it? Are there impervious surfaces that you can harvest rainwater for reuse? Are there conveyance systems that can be converted to bioswales?

13 Eliminate it!

14 Reduce It!

15 Disconnect It!

16 For 1.25 inch storm, 3,811 cubic feet of runoff = 28,500 gallons 1 acre directly connected impervious cover Total drainage area = 3 acres 2 acres pervious cover Runoff Direction Stormwater Inlet

17 For 1.25 inch storm, 581 cubic feet of runoff = 4,360 gallons 1 acre directly connected impervious cover Total drainage area = 3 acres 2 acres pervious cover Runoff Direction Stormwater Inlet

18 Volume of Runoff Design Storm Connected (gallons) Disconnected (gallons) Percent Difference 1.25 inches (water quality storm) 28,500 4,360 85%

19 Disconnection with Rain Water Harvesting Disconnect your downspout by installing a rain barrel Impervious area is now disconnected from flowing directly into the storm sewer system

20 Disconnection with Rain Gardens Rooftop runoff is now disconnected from flowing directly into the storm sewer system

21 Who is building Green Infrastructure in New Jersey?

22 Public Works Department

23 Greening the Department of Public Works Parsippany-Troy Hills, Morris County and Clark, Union County

24 Schools

25 Stormwater Management In Your Schoolyard 1. Educational Lectures 2. Hands-on Activities 3. Community Level Outreach 4. Rain Gardens, Rain Barrels, Watershed Management, and Water Conservation Objective Empower students to take action in their local community. Partners Rutgers Cooperative Extension County 4-H Youth Development Programs AmeriCorps Watershed Ambassadors Master Gardeners

26 Stormwater Management In Your Schoolyard Birches Elementary School Penn Tech High School Timber Creek High School

27 Utilities Authority

28 Green Gateway and Camden SMART, Camden, NJ Camden County Municipal Utilities Authority

29 FOR MORE INFORMATION:

30 Government Leaders and Commissions

31 Hamilton Township, Mercer County Flood Reduction and Stormwater Management Program Develop Hydrologic Model for Hamilton Township Conduct Inventory and Assessment of Stormwater Management Basins Prepare a GIS Database of Stormwater Infrastructure Implement Rain Garden Demonstration Projects Implement Detention Basin Maintenance Training, Inspection, and Monitoring Program Conduct Rain Barrel Workshops for residents Educate Municipal Officials

32 City of Hoboken, Hudson County Sustainable Jersey Grant for Green Infrastructure EXISTING STORM INLET PROPOSED CURB EXTENSIONS

33 City of Hoboken, Hudson County Sustainable Jersey Grant for Green Infrastructure

34 Princeton Township Environmental Commission Rain Barrel Program

35 Community Organizations

36 298 Sussex Avenue Newark, NJ Community Garden Above Ground Cistern Installation Workshop with Rainwater Harvest Company FOR MORE INFORMATION: Greater Newark Conservancy

37 298 Sussex Avenue Newark, NJ Community Garden Above Ground Cistern Installation Completed

38 Puerto Rican Unity for Progress, Camden, NJ Rain Garden and Rain Barrel Programs FOR MORE INFORMATION:

39 Whale Pond Brook Watershed

40 Whale Pond Brook Watershed

41 9% 6% Municipalities Ocean Township West Long Branch Boro Eatontown Borough 45% Long Branch City 25% Tinton Falls Borough 15%

42 Land Use 1,088 acres of impervious cover = 28.1% 1.42 billion gallons of runoff per year from impervious surfaces 1.0% 1.0% 1.2% 15.3% 9.1% 72.4% Agricultural Barren Land Forest Urban Water Wetlands

43 Join Us In Keeping the Rain from the Drain Here is how we do it!

44 Desktop Analysis

45 Use Web-Based Maps to Identify Potential Project Sites

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49 Site Visits (here is an example)

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52 Document Recommendations (here is an example)

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56 Picture is worth 1,000 words (here is an example)

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58 WOW! How do we get started? Complete Impervious Cover Assessment Complete Impervious Cover Reduction Action Plan Use these plans to solicit funding and other resources Implement projects in the Action Plan

59 Rutgers Cooperative Extension Water Resources Program Christopher C. Obropta, Ph.D., P.E. Extension Specialist in Water Resources