Green Infrastructure for Municipalities in New York s Lake Champlain Basin

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Ilene McDowell
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1 Green Infrastructure for Municipalities in New York s Lake Champlain Basin Building Development

2 Manual Download If you haven t already, download the manual: View Past Webinars on YouTube: Or just search Lake Champlain Basin Program YouTube 7/13/2017 2

3 Building Development - Introduction GI Manages Water Close to the Source and Buildings are the top of the drainage in many cases 7/13/2017 3

4 Building Development - Introduction With Rooftop Runoff We Want To Capture Divert Reduce 7/13/2017 4

5 Building Development Poll Question! Do you have any building-related Green Infrastructure in your town/city? Type your answer in the Chat Box on the righthand side of the screen. 7/13/2017 5

6 Building Development Stormwater Issues Common Issues Associated with Rooftop Stormwater Nitrogen Deposition Organic Deposition (Phosphorus) 7/13/2017 6

7 Building Development Stormwater Issues Common Issues Associated with Rooftop Stormwater Temperature Increases 7/13/2017 7

8 Building Development Stormwater Issues Common Issues Associated with Rooftop Stormwater Flow Increases Pre-Roof Development Post-Roof Development 7/13/2017 8

9 Building Development Challenges and Opportunities Integration with Architecture and Structural Engineering Need to ensure that design professionals work together EARLY in the design process Whole-Site Design Ultra-urban sites building is most of the lot BUT In most cases there are other hardscapes on the site (sidewalks, parking lots, etc.) Need to design for it all! 7/13/2017 9

Building Development Practice Selection Impervious Cover Reduction Managing a building

Moderate: Guttered Confined Area Stormwater Planter Filters and infiltrates stormwater;

for nonguttered roofs; infiltrates runoff O&M: Flat Green Roof Aesthetically pleasing; no

5) 1) Start by deciding if you can reduce impervious cover or preserve natural features

10 Building Development Practice Selection Impervious Cover Reduction Managing a building Preservation of Natural Features Operation and Maintenance (O&M) Requirements: Minimal: Moderate: Guttered Confined Area Stormwater Planter Filters and infiltrates stormwater; aesthetically pleasing O&M: Unconfined Area Non-guttered Drip Line Infiltration Trench Ideal for nonguttered roofs; infiltrates runoff O&M: Flat Green Roof Aesthetically pleasing; no additional space required O&M: Decision Tree (pg. 5) 1) Start by deciding if you can reduce impervious cover or preserve natural features on-site 2) Is the roof guttered or not? 3) Is it flat? 4) Is the site tight (confined) or not? High: Dry Well Cistern / Rain Barrel Rain Garden / Bioretention Rooftop Disconnection This Will Guide Your Design Process. Infiltrates concentrated runoff; ideal for well-drained soils O&M: Wide applicability; allows for nonpotable use of stormwater Manages runoff from rooftops; wildlife habitat; aesthetically pleasing Direct downspouts to stable vegetated areas; prevents erosion, decreases runoff O&M: O&M: O&M: 7/13/

11 Building Development Practice Selection Green Roofs Benefits: 1. Reduces Runoff Volume 2. Reduces Temperature Effects 3. Can be aesthetic improvement 7/13/

12 Building Development Practice Selection Cisterns and Rain Barrels Benefits: 1. Runoff Reduction 2. Water Reuse (and cost savings) 3. Pollutant Filtering 7/13/

13 Building Development Practice Selection Disconnection Benefits: 1. Runoff Reduction (Helps in combined-sewer areas) 2. Pollutant Filtering 3. Irrigation for lawns/gardens 7/13/

14 Building Development Practice Selection Stormwater Planter Benefits: 1. Runoff Reduction 2. Pollutant Filtering 7/13/

15 Building Development Practice Selection Rain Gardens (Bioretention) Benefits: 1. Runoff Reduction 2. Pollutant Filtering 3. Aesthetic Improvement 7/13/

16 Building Development Case Studies Lake George Public Library Cistern Lake Placid Golden Arrow Green Roof 7/13/

17 Building Development Case Studies St. Albans, VT City Garage Cistern Morrisville, VT Public Library Rain Garden 7/13/

18 Building Development Poll Question! Which of these practices would you be most likely to implement and why?? Green Roof Cistern/Rain Barrel Disconnection Stormwater Planter Rain Garden (Bioretention) Type your answers in the Chat Box on the right-hand side of the screen. 7/13/

19 Building Development Featured Case Study Syracuse War Memorial Cistern 7/13/

20 Building Development Questions for Madison? Type your questions in the Chat Box in the right-hand side of the screen. 7/13/

21 Building Development - Summary Managing building runoff is important in reducing flows to other infrastructure Re-using rooftop runoff can save money It s important to involve all design professionals EARLY in the planning process 7/13/

22 Building Development - Conclusion Thanks for Listening! Be sure to look back in our video archives for webinars you missed and download the manual. 7/13/

Green Infrastructure for Municipalities in New York s Lake Champlain Basin

Green Infrastructure for Municipalities in New York s Lake Champlain Basin Rural Roads Manual Download If you haven t already, download the manual: http://www.lcbp.org/2017/05/green-infrastructure-webinarseries/