Global Best Practice Examples for Integrated Water Presentation to the IPWEA Land Development Forum, 16 March 2017 Date

How do we manage water? DRIVERS FUNCTIONS The various drivers for change that I have outlined present us with a range of challenges and opportunities for the management of urban water systems. There is increased decoupling of urban and rural systems and a diminishing holistic consideration of the global water cycle, with urban areas being considered as isolated entities. For cities to succeed in a world characterised by resource issues and constraints, we must recognize that cities don’t exist in isolation. We need to move from independent consideration of our various water resources to a more integrated approach and ultimately a ‘one water’ community. This diagram shows the progression. Water supply community – Need for a reliable and secure water supply through water storage, treatment and transfer systems Sewered community – Need for public health protection through sewers, treatment plants and effluent disposal locations Drained community – Need for flood protection through drains and channels, levees, river barrage Waterways community – Need for environmental protection through point and non-point source pollution control In many respects we are stuck at this point. Development of the various water systems but a lack of holistic planning and views around how more integrated thinking could lead to better outcomes. This holistic thinking leads to what can be described as: Water cycle community - Need to balance natural resource limitations through increased diversity, fit for use water, conservation, needs for both urban and rural water systems One Water community – Need for resilient, sustainable communities through integrated community design, infrastructure renewal, resource recovery, understanding the real economic value of water and the interdependence between systems. The exploding global demand for “water-heavy” goods including food and technological products is another critical factor, with agriculture already responsible for around 70% of freshwater withdrawals globally. Example – Stormwater separation projects for pollution control, but first flush from stormwater can be more polluting. FUNCTIONS

Towards a more sustainable urban water cycle

Issues that integrated water management can help address Flooding and flood management Poor state of waterways Responding to effects of sea level rise Long term availability of water supply Long term sustainable wastewater treatment and disposal People don’t value water

One Water US Water Alliance 1 One Water US Water Alliance

Achieve multiple benefits All water has value Achieve multiple benefits Systems mindset Watershed-scale thinking and action Partnerships and inclusion

2 Portland, US Green City

Portland Clean River Rewards On-site stormwater charge is 35% of the total stormwater charge

Portland Ecoroofs

Ecoroof Incentive results to 2012

3 Atlanta, US Transformation driven by severe rainfall events in 2012

“Our ultimate goal is to reduce stormwater runoff by 225 million gallons annually.”

Atlanta Watershed Management Goals Customer Service Safe Workplace Environmental Compliance Efficient Operations

This 34,000m³ pond detain flows from a 100-year storm event and celebrates water

Rainwater city principles from the POLIS Water Sustainability Project The critical first step for each of the three principles is as follows (the publication also details subsequent steps):   Create incentives for property owners and developers to install green infrastructure e.g. expedited planning and favourable zoning allowances. Setting effective permeability targets for a zone provides direction and focus as well as benchmarks against which future developments can be measured. Promote non-potable water for all irrigation and overcome code restrictions. Integrate water service departments so that drinking water supply, storm- water, and wastewater are managed as a single system that mimics the natural water cycle and establish a regional watershed entity with a clear mandate to address watershed-level issues and decision-making powers as they relate to land-use decisions that impact water resources.

4 Singapore Active Beautiful Clean Waters programme

ABC Design Guidelines

5 Sydney, Australia Leaders in water demand management

Driven by drought

Urban Green-Blue Grids the Netherlands 3 Urban Green-Blue Grids the Netherlands Green-blue urban grids make cities sustainable, resilient and climate-proof

Common themes from the global examples Valuing water is the key Aim for multiple benefits Think of the natural water cycle Working together is essential Get the public involved

Questions?