Impacts From Development

Transcription

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3 Why Rainwater?

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5 Impacts From Development

6 Point Source Pollution

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8 Benefits Storm Water Management Reduce CSO s s & SSO s Promote Water Quality Water Conservation Reduction Potable Water Use

9 A leading-edge edge system for designing, constructing, operating and certifying the world s s greenest buildings. Leadership in Energy & Environmental Design

10 LEED Credits for Water Efficiency (WE) WE Prerequisite 1: Water Use Reduction Reduces the burden on municipal water supply and wastewater systems WE Credit 1:1 Water Efficient Landscaping (Reduce by 50%) WE Credit 1.2: Water Efficient Landscaping (No Potable Water Use or No Irrigation)

11 LEED Credits for Water Efficiency (WE) WE Credit 2: Innovative Wastewater Technologies Reduce wastewater generation and potable water demand, while increasing the local aquifer recharge.

12 LEED Credits for Water Efficiency (WE) WE Credit 3.1: Water Use Reduction (20% Reduction) WE Credit 3.2: Water Use Reduction (30% Reduction) Further increase water efficiency within buildings to reduce the burden on municipal water supply and wastewater systems.

13 LEED Credits for Sustainable Sites (SS) SS Credit 6.1 Storm water Design: Quantity Control Limit disruption of natural water hydrology by reducing impervious cover, increasing onsite infiltration, reducing or eliminating pollution from storm water runoff, and eliminating contaminants. SS Credit 6.2 Storm water Design: Quality Control Limit disruption and pollution of natural water flows by managing storm water runoff.

14 Water reuse in the U.S. is a large and growing practice Nationally, an estimated 1.7 billion gallons per day is reused. Reclaimed water use on a volume basis is growing an estimated 15% per year. In 2002, Florida reclaimed 584 mgd. California ranked a close second with 525 mgd used every day. Florida has an official goal of reclaiming 1 billion gallon per day by the year Texas, Arizona, Nevada, Colorado, Georgia, Washington

15 Urban Reuse Irrigation of parks, highway medians, golf courses, etc. Commercial uses such as vehicle washing, window washing, etc. Fire protection (Secondary) Dust control and concrete production Toilet and urinal flushing Groundwater recharge Industrial Reuse Cooling water Boiler make-up water Industrial process water Laundry Car Washing Agricultural reuse Environmental and recreational To create, restore, and/or enhance wetlands Recreational and aesthetic impoundments Augmentation of potable supplies Reclaimed wastewater is an increasingly important source of supply

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17 Currently there are no federal regulations directly governing water reuse practices. ICC-Green Building Code Supplement IAPMO- Codes and Standards 25 states have regulations regarding the us of reclaimed water 16 states have guidelines or design standards 9 states have no regulations

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19 Question 1 1) List 4 LEED credits available for rain water harvesting systems 1) 2) 3) 4)

20 Cistern Sizing Guideline 1 of rainfall over 1sq/ft of area equals.623 gallons

21 Storage potential 15,000 Sq/ft x.623 x 3.46 = = 32,333 gallons

22 Monthly Average Rainfall Month # 0f yrs Average Rainfall (inches) January February March April May June July August September October November December 30 4 Total 41.5 (3.46)

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26 MRS with Recirculation Line

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34 U.S. Drought Monitor Georgia February 21, 2012 Valid 7 a.m. EST Drought Conditions (Percent Area) None D0-D4 D1-D4 D2-D4 D3-D4 D4 Current Last Week (02/14/2012 map) 3 Months Ago (11/22/2011 map) Start of Calendar Year (12/27/2011 map) Start of Water Year (09/27/2011 map) One Year Ago (02/15/2011 map) Intensity: D0 Abnormally Dry D1 Drought - Moderate D2 Drought - Severe D3 Drought - Extreme D4 Drought - Exceptional The Drought Monitor focuses on broad-scale conditions. Local conditions may vary. See accompanying text summary for forecast statements. Svoboda, National Drought Mitigation Center Released Thursday, February 23, 2012

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36 Question 2 2) How much rain can we collect from a 20,000 sq/ft roof with an average rainfall of 3.5 per month?

37 Brandywood Cistern Concrete Plastic Fiberglass Wood Protected Steel HDPE Membrane

38 30,000 GALLON HORIZONTAL WATER STORAGE TANK

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40 Henrico County 50,000 gallon cistern

41 Ford Motor Company

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46 LIBERTY ISLAND, NEW YORK BAY TWO (2) 7,500 GALLON HIGHDRO WATER STORAGE TANKS

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50 Vertical Screen

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54 Filtration Ringling College Multi-Media Media Filter

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57 Henrico Filtration Skid

58 Duke Farms Chlorine Ozone Ultraviolet

59 Primary Disinfection

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61 Question 3 3)List 3 critical elements in a properly designed rain water harvesting system. 1) 2) 3)

62 Secondary Disinfection

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64 Vertical Screen

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67 Great Neck Middle School

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70 Henrico County Day Tank

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72 Day Tank Sizing Guideline Flow rate per fixture: (Flushometer) 1.3 gpf Typical Fixture Usage Per Person: Water Closets 5 Number of Fixtures: Occupants x 5 flushes = 200 gallons 200 gallons x 1.3 gpf = 260 gallons per day 260 gallons per day x 5 days =1300 gallons per week 1300 gallons x 4.3 = 5590 gallons per month

73 Water Balance Chart Month Rainfall (Inches) 90% of Precipitation Over 15,000 sq. ft. (gallons) Toilet Water Demand (gallons per month) Surplus or Deficit (gallons) January , ,053 February , ,052 March , ,986 April , ,053 May , ,248 June , ,379 July , ,576 August , ,314 September , ,379 October , ,248 November , ,659 December , ,790

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75 Question 4 4) Name 3 types of oxidizers for disinfection. 1) 2) 3)

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83 Henrico County Triplex Booster Set

84 Ringling College Booster Set

85 Plc. Controllers

86 HT RWC I

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89 Costs vs. Benefits Costs: Capital costs for equipment First flush, tank(s) filtration/disinfection pump(s), installation $3-$10 $10 per gallon Costs: Operational Costs Chemicals Tank/Pump maintenance Electricity $200-$1,500 $1,500 annually

90 Benefits Benefit: Water savings equal to municipal water rate Benefit: Surface water quality protection (Storm water fees) One time charge Benefit: Flood risk reduction (fines) SSO s CSO s

91 Resources

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96 Question 5 5) What are 2 functions of a properly designed rain water harvesting system? 1) 2)

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109 Talking Points Sole Source Manufacturing Modular design Value Added Skid mounted filtration/disinfection, booster pumps, day tank Test Rig Engineering support Sizing calcs

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