SHAC Water Conservation - Maggie Lawton

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Information about SHAC Water Conservation - Maggie Lawton

Published on May 14, 2008

Author: twbishop

Source: slideshare.net

Description

Design Criteria
•Water efficient fittings and appliances
•On-site water capture and reuse
•Water supply flow rates optimised to balance required performance and conservation
•Local retention of stormwater runoff, stormwater treatment train with consideration of raingardens, roofgardens and swales
•Wastewater minimised and/or reused; information on water use readily available
•In-house water supply flow rate optimised
•Plumbing system designed for water and energy efficiency
•Site design recognition of local soil and climate conditions and low water use garden design applied.

Water Conservation SHaC Video-conference 14 May 2008

Water in the built environment Water Supply Wastewater treatment Stormwater treatment

Water Supply

Wastewater treatment

Stormwater treatment

Judging Criteria RESEARCH & DESIGN & DEVELOPMENT 30% 1. Teamwork and Collaboration within Tertiary organisation, and with Industry, Local Government, and other Teams 2. Project Management: Research, Planning and Process COMMUNITY CONNECTION 25% 3. Community Engagement 4. Communication of design and rational to community DESIGN AND ARCHITECTURE 45% 5. Health 6. Energy 7. Material and Resource Use 8. Water & Waste Management 9. Site and Environment 10. Architecture and Affordability

RESEARCH & DESIGN & DEVELOPMENT 30%

1. Teamwork and Collaboration within Tertiary organisation, and with Industry, Local Government, and other Teams

2. Project Management: Research, Planning and Process

COMMUNITY CONNECTION 25%

3. Community Engagement

4. Communication of design and rational to community

DESIGN AND ARCHITECTURE 45%

5. Health

6. Energy

7. Material and Resource Use

8. Water & Waste Management

9. Site and Environment

10. Architecture and Affordability

Hydrologic Cycle

Water Criteria 90 l/pp/pd design critera is achievable without supplementary supply Stormwater flows attenuated Wastewater reduced where possible Innovation being sought, in particular integration of water services.

90 l/pp/pd design critera is achievable without supplementary supply

Stormwater flows attenuated

Wastewater reduced where possible

Innovation being sought, in particular integration of water services.

What we are looking for Safe and healthy water services to the home Maximising water use efficiency Providing resilience to the system through supplementary supply Retaining stormwater on-site, allowing infiltration Integrating services where possible Pushing the boundaries, gently; showing innovation Understanding (not necessarily agreeing with) regulatory constraints and working with regulators where required Demonstrating how design criteria have been developed to meet performance targets Integrating the water services where possible and considering whether integration with other services .

Safe and healthy water services to the home

Maximising water use efficiency

Providing resilience to the system through supplementary supply

Retaining stormwater on-site, allowing infiltration

Integrating services where possible

Pushing the boundaries, gently; showing innovation

Understanding (not necessarily agreeing with) regulatory constraints and working with regulators where required

Demonstrating how design criteria have been developed to meet performance targets

Integrating the water services where possible and considering whether integration with other services .

 

Social Considerations Less than 0.08% of all the Earth's water is available for biological life. Yet over the next two decades human use is estimated to increase by about 40%. Local Government Act requires thinking sustainably across the four pillars of wellbeing – cultural, environmental, social and economic.

Less than 0.08% of all the Earth's water is available for biological life. Yet over the next two decades human use is estimated to increase by about 40%.

Local Government Act requires thinking sustainably across the four pillars of wellbeing – cultural, environmental, social and economic.

Building resilience Reducing competing demands for water in parts of the Country where water resources are constrained. Reducing the need for further large water supply systems which cause changes to the water cycle and do not operate in harmony with natural water cycles and water catchments. Anticipating potential climate related changes and resulting water cycle disturbances Reducing the contribution of leaks and spills from wastewater on declining water quality in New Zealand Recognising that some water sources are not renewable in the short-term, for example groundwater is generally non-renewable for practical purposes

Reducing competing demands for water in parts of the Country where water resources are constrained.

Reducing the need for further large water supply systems which cause changes to the water cycle and do not operate in harmony with natural water cycles and water catchments.

Anticipating potential climate related changes and resulting water cycle disturbances

Reducing the contribution of leaks and spills from wastewater on declining water quality in New Zealand

Recognising that some water sources are not renewable in the short-term, for example groundwater is generally non-renewable for practical purposes

Cost savings Saving on capital costs through delaying or eliminating infrastructure development. Achieving cost savings in wastewater management through reducing the water that goes through the system. Saving cost associated with energy through reducing in-house hot water use. Saving costs associated with energy and maintenance in both the treatment of water to a potable standard and its reticulation. Saving energy and maintenance costs in the reticulation and treatment of wastewater.

Saving on capital costs through delaying or eliminating infrastructure development.

Achieving cost savings in wastewater management through reducing the water that goes through the system.

Saving cost associated with energy through reducing in-house hot water use.

Saving costs associated with energy and maintenance in both the treatment of water to a potable standard and its reticulation.

Saving energy and maintenance costs in the reticulation and treatment of wastewater.

life supporting resources declining consumption of life supporting resources rising

 

“ We can’t solve problems by using the same kind of thinking we used when we created them” Albert Einstein.

From this….

To this…

We could be going from: This….. To this

Water Use Efficiency

Typical breakdown of domestic water use

Comparison of daily per capita water uses * =metered with volumetric pricing Council Daily Per Capita Water Use Figure Nelson 160* Waitakere 167* Rodney 179* Metrowater (Auckland City) 184* Manukau 189* Papakura 190* Kawerau 214 Upper Hutt 227 Tauranga 265* Christchurch 333 South Taranaki 450 Kaikoura 648 Kapiti 650 Queenstown Lakes District 750

Current technology Technology including Rainwater tanks Greywater Reuse Reduced or low flow devices Pressure reducers Tap aerators and flow restrictors Dual flush/low flush toilet Water efficient appliances WELS rating system should be in use this year Smarter use of Water

Technology including

Rainwater tanks

Greywater Reuse

Reduced or low flow devices

Pressure reducers

Tap aerators and flow restrictors

Dual flush/low flush toilet

Water efficient appliances

WELS rating system should be in use this year

Products Costs $s Costs with installation Water savings % of total use Accumulative water savings % of total use Gismo 2 5-10 5 Tap Aerators 10 5-10 10 Outdoor hose washers 2 2-5 12-15 Low flow shower head 75 150 10-15 22-30 Dual Flush Toilets (<5l) 225 300 10-15 27-40 4 star rated washing machine 1200 10 37-50 Rain barrel 400 litres or 300 10-15 47-60 Rain tank 4500 litres or 4000 4500 40-60 75 plus Wastewater recovery system 3000 4000 20-40 60 plus

Relative increasing cost and difficulty Schematic of DM options against cost and difficulty of implementation for the domestic user

 

Landcare’s water management Rainwater from all roofs is collected in this 25,000 litre tank. It is used for toilet flushing on ground floor, for urinals and for irrigation of glasshouses.

 

 

Kapiti Coast District Council Public education Wide ranging education progs & free services,eg. green gardener & plumber, and garden show Subdivision Code of Practice promoted low impact urban design Proposed a District Plan change- two acceptable solutions which promote water conservation But: no metering and still have 650 l/pp/pd

Public education

Wide ranging education progs

& free services,eg. green gardener

& plumber, and garden show

Subdivision Code of Practice promoted low impact urban design

Proposed a District Plan change- two acceptable solutions which promote water conservation

But: no metering and still have 650 l/pp/pd

Modeled water reduction for Kapiti

Composting Toilets · ·      

Wastewater Management

 

 

 

 

Stormwater Managament

 

 

Prevention Techniques Landscaping rain gardens, swales, absorbent materials Green Roofs Pervious Pavement Ponds and Wetlands Infiltration Trenches Common site-level Best Management Practices

Landscaping

rain gardens, swales, absorbent

materials

Green Roofs

Pervious Pavement

Ponds and Wetlands

Infiltration Trenches

Water Quality Friendly Streets Source: City of Portland Water Quality Friendly Streets Program. http://www.portlandonline.com/bes/index.cfm?c=32066

 

 

 

 

 

The Kapiti Coast District Council experience in changing the rules of the game for subdivision & development Out with the old and in with the new

 

Living areas face the street Permeable fences Houses facing reserve/public open space Located on site for solar access Each house has private space outside to rear or back of property Narrower carriageways Located near planned railway station Building materials chosen for long term durability On the ground change

Living areas face the street

Permeable fences

Houses facing reserve/public open space

Located on site for solar access

Each house has private space outside to rear or back of property

Narrower carriageways

Located near planned railway station

Building materials chosen for long term durability

Low flow showerheads Watersmart two tank system Rainwater for use in gardens Town supply for use in house Greywater collected for watering lawns Uses covenants on the title to ensure systems are maintained On the ground change

Low flow showerheads

Watersmart two tank system

Rainwater for use in gardens

Town supply for use in house

Greywater collected for watering lawns

Uses covenants on the title to ensure systems are maintained

Example of 500m 2 lots SMA 2 54% 61% 61% 48% 61% 53% 55%

Permitted Activity Route, North Shore “ Off-the-shelf” standard solutions SMA & Activity Preferred mitigation methods Rain tanks Bio - retention Provide multiple benefits Practice notes to aid with design (Source:Maplewood, Minisata)

“ Off-the-shelf” standard solutions

SMA & Activity

Preferred mitigation methods

Rain tanks

Bio - retention

Provide multiple benefits

Practice notes to aid with design

Bio-retention Rain gardens, SW planters, Bio- retention swales, Tree Pits Benefits: Water volume reduction, Peak flow control, Water quality, Amenity Min Design Requirements: Min depth 600mm of planting soil 8% of area (or 5%) Practice note to help with design Gardens not treatment devices

Rain gardens, SW planters, Bio- retention swales, Tree Pits

Benefits:

Water volume reduction,

Peak flow control,

Water quality,

Amenity

Min Design

Requirements:

Min depth 600mm of planting soil

8% of area (or 5%)

Practice note to help with design

Gardens not treatment devices

Water Quality Friendly Streets Curb Cut w/Pad

 

 

 

Council documentation Engineering standards Council Engineering Manuals Verification Methods and Acceptable Solutions Information Pamphlets and Brochures Practice Notes/Design Guidelines

Engineering standards

Council Engineering Manuals

Verification Methods and Acceptable Solutions

Information Pamphlets and Brochures

Practice Notes/Design Guidelines

Based on work of Prof Hans Schreier A Traditional Approach >Impervious Surfaces < Buffer Zones Stormwater Piping Large scale infrastructure End of Pipe Treatment Point Source Pollution Expanding Water Supplies Focus – Single Pollutants Water Use of Human Activities Government Management A Sustainable Approach < Impervious Surfaces > Buffer Zones Creating biological solutions On-site solutions Detaining Stormwater Non-Point Source Pollution Controlling Demand Source Control Water for Environmental Services Community Involvement

A Traditional Approach

>Impervious Surfaces

< Buffer Zones

Stormwater Piping

Large scale infrastructure

End of Pipe Treatment

Point Source Pollution

Expanding Water Supplies

Focus – Single Pollutants

Water Use of Human Activities

Government Management

A Sustainable Approach

< Impervious Surfaces

> Buffer Zones

Creating biological solutions

On-site solutions

Detaining Stormwater

Non-Point Source Pollution

Controlling Demand

Source Control

Water for Environmental Services

Community Involvement

Design Criteria Water efficient fittings and appliances On-site water capture and reuse Water supply flow rates optimised to balance required performance and conservation Local retention of stormwater runoff, stormwater treatment train with consideration of raingardens, roofgardens and swales Wastewater minimised and/or reused; information on water use readily available In-house water supply flow rate optimised Plumbing system designed for water and energy efficiency Site design recognition of local soil and climate conditions and low water use garden design applied.

Water efficient fittings and appliances

On-site water capture and reuse

Water supply flow rates optimised to balance required performance and conservation

Local retention of stormwater runoff, stormwater treatment train with consideration of raingardens, roofgardens and swales

Wastewater minimised and/or reused; information on water use readily available

In-house water supply flow rate optimised

Plumbing system designed for water and energy efficiency

Site design recognition of local soil and climate conditions and low water use garden design applied.

Website resources http:// www.level.org.nz http://www.sustainablehouseholds.org.nz/actionpdfs/save_water_action.pdf http://www.smarterhomes.org.nz/water/ http://www.ecobob.co.nz/EcoBusiness/Browse.aspx also good for products and services http://www.waitakere.govt.nz/CnlSer/wtr/wtrsavetips.asp http://www.ecomatters.org.nz/09_Water/091_Water/091d_Water_06_top_10_tips.htm http://www.ecan.govt.nz/Our+Environment/Energy/YourHome/homeimprovement/hot-water.htm for hot water saving tips http://www.bethedifference.gw.govt.nz http://www.ccc.govt.nz.waterwause/story2.497.cfm? http://www.greenpagesaustralia.com.au http://www.consumerbuild.org.nz/publish/maintenance/kitchen-bathroom-plumbing.php

http:// www.level.org.nz

http://www.sustainablehouseholds.org.nz/actionpdfs/save_water_action.pdf

http://www.smarterhomes.org.nz/water/

http://www.ecobob.co.nz/EcoBusiness/Browse.aspx also good for products and services

http://www.waitakere.govt.nz/CnlSer/wtr/wtrsavetips.asp

http://www.ecomatters.org.nz/09_Water/091_Water/091d_Water_06_top_10_tips.htm

http://www.ecan.govt.nz/Our+Environment/Energy/YourHome/homeimprovement/hot-water.htm for hot water saving tips

http://www.bethedifference.gw.govt.nz

http://www.ccc.govt.nz.waterwause/story2.497.cfm?

http://www.greenpagesaustralia.com.au

http://www.consumerbuild.org.nz/publish/maintenance/kitchen-bathroom-plumbing.php

 

Definitions Residential Built Environment “ The residential built environment consists of the buildings and supporting infrastructure that together constitute the surroundings in which people dwell. It includes, therefore, not only people’s dwellings but other neighbourhood buildings. It also includes the arrangement of infrastructure that service dwellings and the neighbourhoods in which those dwellings are situated.” Sustainability and Affordability “ In achieving sustainability of residential built environments the focus is on the sustainability of individual dwellings but also the neighbourhoods in which they are situated. The goal is to make improving the sustainability of dwellings and neighbourhoods both affordable and cost-competitive.”

Systems Industry, Infrastructure, Government, Consumers Pull based on market and needs Energy Water IEQ Pull based on prioritised systems and HSS Market Transformation – pan communication and alignment Policy and Regulation – pan regulatory involvement Beacon’s Operating Model Neighbourhoods New Homes Retrofit Homes

BEACON WATER TARGETS All Homes - reducing per capita demand for reticulated water by 40% and council mains supply by 50%. All Homes & Neighbourhoods – Effective management of three waters to create a more resilient water system Nation Region Neighbourhood Home City

BEACON WATER TARGETS

All Homes - reducing per capita demand for reticulated water by 40% and council mains supply by 50%.

All Homes & Neighbourhoods – Effective management of three waters to create a more resilient water system

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