Water Resilient Cities - Kala Valmoothy

AIWW Session: Water Resilient Cities 20 June 2019, Amsterdam KALA VAIRAVAMOORTHY, Executive Director, IWA

We require a level of leadership and innovation unprecedented in our history complexity in transitioning to one water solutions We live in the ‘now’ deep uncertainty associated with global change pressures

CSt & ASh

Decisions need to be made about are aging & outdated infrastructure

The IWA Principles for Water-Wise Cities Regenerative Water Services for all Water Sensitive Urban Design Cities & Watershed Stewardship Building water-wise communities

The IWA Principles for Water-Wise Cities Regenerative Water Services for all Water Sensitive Urban Design Cities & Watershed Stewardship Building water-wise communities

The IWA Principles for Water-Wise Cities Regenerative Water Services for all

We need to have a systems perspective of the water cycle Stormwater/ Rainwater

Groundwater Surface water

Leakage management Desalination

Black water

Grey water

Demand management

Modelling allows us to connect all flows with productive uses

SURFACE WATER/GROUNDWATER/DESALINATION)

WATER SUPPLY

IRRIGATION

KEY

RAINWATER/ STORMWATER HARVESTING

COMM/DOM/IND/USE

GREYWATER REUSE

POTABLE WATER RAIN/STORMWATER

WASTEWATER TREATMENT

GREY WATER RECLAIMED WATER BLACK WATER RECEIVING BODY (SUSRFACE/GROUNDWATER)

Changing our perspective creates opportunity to do things differently Resource Recovery & Reuse (RRR)

Energy: electric (microturbines) Nutrients: P & N

Energy: Biogas, bioelec, biofuels, MFC

Nutrients: P & N

Energy: Heat, electric (microturbines)

Important to understand the business model Key Partners

Key Activities

Key Resources

Cost Structure

Value Proposition

Customer Relationships

Channels

Revenue Streams

Customer Segments

The IWA Principles for Water-Wise Cities Regenerative Water Services for all Water Sensitive Urban Design Cities & Watershed Stewardship Building water-wise communities

The IWA Principles for Water-Wise Cities

Water Sensitive Urban Design

We are living in an uncertain world

Uncertainty in storm events

Uncertainty in pipe condition

Uncertainty in demand

Uncertainty in quantity & quality

Uncertainty in energy

Uncertainty in water allocation

We need adaptive/flexible smart systems for an uncertain world

2010

2020

2030

2040

2050

2060

LID’s are modular in nature eco-treatment

infiltration trench

green roofs

tree filters

pervious pavement

retention pond

LID’s provides modular diversity that increases flexibility resulting in a complex adaptive system

LID’s provide adaptive capacity

Urban Urbanization

Early Urban

Time

LID’s performance better against diverse future scenarios = higher flexibility Case Study: Kupferzell Germany Hydraulics

Water Cycle

Economics

Pollution Load

Technical Issues

Amenity

Urban Planning

LID

Sewers

Utility Value

Opt

Scenario 1

Scenario 2

Scenario 3

Scenario 4

Eckart, Sieker, Vairavamoorthy (2010)

These perspectives lead to a more decentralized type of thinking?

Decentralization well suited for: • Energy recovery (heat recovered and used close to source) • Minimizing energy consumption (for moving water) • Source separation (to maximize nutrient recovery) • Adjusted growth (to deal with rapid growing cities) • Increased resiliency (dampens the propagation of failures)

The IWA Principles for Water-Wise Cities

Cities & Watershed Stewardship Building water-wise communities

It’s ok to optimize at sub-system level

Water

It’s ok to optimize at sub-system level

Water

Urban Ecology

Energy

Building and Urban Form

Transportation

Solid Waste

But we need to recognize that we’re dealing with a ‘system of systems’

Energy

Water

Flood Mitigation, Pollution Reduction GW Recharge Urban Ecology

GI reduces energy Carbon Co-digestion for water Sequestration (Biogas Production)

Transportation

Reduce Energy Demand Filter/ Reduce Air Pollution

Building and Urban Form

Shading/ Reduce Urban Heat Island

Waste Neutralization

Solid Waste

At watershed level also ‘system of systems’ Urban/Peri Urban

Energy & Industry

Reused Water

Flood Mitigation, Pollution Reduction GW Recharge

Ecosystems

Co-digestion (Biogas Water Efficiencies Efficiencies (+) Production) Water (-) Carbon GI reduces energy Sequestration for water

Agriculture

Choices Before Us Stay in Lane

Try Harder

Paradigm Shift

Business as Usual

Spend More for Traditional Sys

Truly Different Approach

What You What You Know..

Know..

What You Don’t Know..

Principles for Water Wise Cities Moving forward – IWA Platform  For knowledge exchange among signatories  Sharing case studies and best practice  Identifying challenges and barriers  Encourage peer to peer learning  Inspire other cities to transition  Partner with IWA to activate actors of change

Who to contact?

Corinne Trommsdorff, Corinne.Trommsdorff@iwahq.org

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30 urban regions endorsed

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100+ individuals and companies

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3 Partners powering up the initiative: Arup, CRC for water Sensitive Cities, Greater Paris Sanitation Authority.

Thank you!

Follow @IWAHQ on Twitter and share your urban water vision using #WaterWiseCities IWA-Connect Group: Cities of the Future