China Business Summit 2023: Call to order
MC: Tim McCready
MC: Tim McCready
MC: Tim McCready
Infrastructure: A billion-dollar plan to build resilience (NZ Herald)
The Government set aside $6 billion in last month’s Budget as part of a National Resilience Plan for strategic investments to “build back better” following the damage from Cyclone Gabrielle and the Auckland Anniversary floods.
This is in addition to the Government’s $71b infrastructure plan over the coming five years.
Damage from Cyclone Gabrielle and the Auckland Anniversary weekend floods has been estimated by Treasury as ranging from $9b to $14.5b — second behind the Canterbury earthquakes in terms of damage from natural disasters New Zealand has faced. Of this, $5b to $7.5b of damage is expected to relate to infrastructure owned by the central and local governments. These costs relate to damage, without including all the immediate and ongoing support for communities and businesses.
The North Island weather events hit the country when the Budget 2023 process was already relatively advanced, requiring Minister for Cyclone Recovery and Minister of Finance Grant Robertson to reprioritise other initiatives in the draft Budget to make way for the response.
Robertson said while the investment will initially focus on building back better from the recent weather events, it will include future-proofing road, rail and local infrastructure wiped out by extreme weather, as well as telecommunications and electricity transmission infrastructure.
“Addressing vulnerabilities in our infrastructure systems to function during adverse conditions and quickly recover after an event is fundamental to the wellbeing of communities,” he said.
“I expect to continue to build on the plan over many years to reduce the severe infrastructure deficits that have held New Zealand back.”
The package would also deliver a new Crown infrastructure delivery agency, Rau Paenga, which could be engaged to assist agencies to deliver the projects in the National Resilience Plan at a cost of $100 million over five years.
This funding follows the $1.1b pre-Budget announcement to assist with repairs to basic infrastructure including road, rail and schools and providing flood resilience support.
Infrastructure funding in the announcement included:
It’s clear that the capital markets will continue to face significant headwinds, with many of the same pressures and external forces that have shaped the sector in recent years still in play.
Persistently high inflation remains a top concern. While it remains stubbornly elevated, there are encouraging signs that it may have peaked after a considerable effort from central banks to rein in spending.
Much of the supply chain disruption caused by Russia’s invasion of Ukraine has stabilised, but persistent geopolitical tensions and fragmentation, particularly between China and the United States, continue to pose a risk to economic and financial stability.
Adding to the complexity, the pandemic-induced global talent shortage is still acutely felt in multiple sectors, including certain areas of the capital markets.
Gaining momentum are several megatrends that have become entwined with the capital markets sector. These include the rapid technological evolution, the growing need for robust cybersecurity measures to protect against digital threats, and the ever-increasing demand for sustainable investment options.
Against this backdrop, here is a wrap of some of the key issues that are likely to shape the capital markets over the coming year.
Despite a challenging global economic environment, the Asia-Pacific region is expected to offer some hope for the coming year.
Earlier this month, the International Monetary Fund (IMF) released a report on the region, noting that despite weakening external demand — such as the downturn in demand for tech exports — domestic demand has remained strong. China’s reopening is providing fresh impetus to the region and a glimmer of optimism for the rest of the world.
The IMF projects Asia-Pacific’s GDP to increase this year to 4.6 per cent, after growing 3.8 per cent in 2022 and contributing around 70 per cent of global growth. This will be driven primarily by the recovery in China as a result of its reopening and surging consumption, along with resilient growth in India.
It said the near-term economic impact of China’s recovery “will likely vary across countries, with those more heavily reliant on tourism likely reaping the most benefit,” and expects the rise in China’s imports to be most strongly reflected in services.
But despite its optimism for the region, the IMF downgraded its projections for Japan, Australia, New Zealand, Singapore and South Korea.
“Stronger external demand from China will provide some respite to advanced economies in the region, but is expected to be largely outweighed by the drag from other domestic and external factors,” it said.
A few months ago, ChatGPT was launched publicly and has quickly disrupted diverse sectors.
Analysts at Goldman Sachs believe artificial intelligence (AI) algorithms could ultimately replace 300 million jobs, and with its ability to interpret vast amounts of data and identify patterns, AI is expected to significantly disrupt the capital markets.
Recently, the University of Florida analysed the accuracy of ChatGPT in predicting whether a news item would affect stock prices positively or negatively.
The results showed AI could make accurate predictions on stock performance and demonstrated that traditional models did not provide any further predictive power over ChatGPT.
Since AI algorithms can process market data in real time, they can react to changes faster than ever before. This will inevitably lead to more algorithmic trading, where machines are able to make trades at the appropriate time without human intervention.
Financial firms are already using AI to understand their customers better. As this tool is refined, it will be able to assist in developing more personalised products and services based on customer behaviour and potentially other public data, such as social media activity.
AI-driven technologies are also being used to detect fraud and money laundering. By analysing large pools of data and identifying suspicious patterns, AI can help financial institutions prevent fraud far more quickly than before.
While AI offers an exciting future for the capital markets, there are some concerns that its increased use could have negative consequences, such as creating market bubbles or amplifying financial instability. But despite that, the rapid introduction of AI tools means that by this time next year, they will undoubtedly have had a significant impact on the sector, offering faster and more accurate decision-making and analysis.
Investing with ESG principles in mind has become a hot topic and the fastest-growing segment of the asset management industry.
ESG principles consider environmental, social and governance factors alongside financials.
Ethical investment principles saw companies unwind their investments in Russia last year and the pandemic highlighted the need to consider societal impacts alongside investments. Locally, the recent climate events highlighted the importance of integrating ESG factors into investment strategies.
Despite growing interest in sustainable investing, the number of new sustainable fund launches has declined this year, according to financial services firm Morningstar. Regulatory uncertainty and increasing concerns about greenwashing are likely contributing to this trend, highlighting the need for greater transparency and accountability in the ESG space.
But while major investors continue to emphasise the importance and performance of ESG investing, some of Wall Street’s largest asset managers, private equity firms and brokers have warned that a backlash against sustainable investing has become a significant risk.
Larry Fink, CEO of BlackRock — one of the world’s largest asset managers — was one of the early and vocal supporters of ESG and stakeholder capitalism. However, in his annual letter this year, he de-emphasised ESG investing and entirely avoided using the three-letter acronym.
ESG has become a complex and challenging topic, particularly in the United States, where anti-ESG sentiment has gained momentum. Republican governors from at least 19 US states have pledged to resist ESG investing, and high-profile Republican figures Mitch McConnell and Ron DeSantis have campaigned against the use of strategies that penalise fossil fuel producers.
According to Fink, Republican state treasurers withdrew around US$4 billion ($6.3 billion) from BlackRock last year.
There are indications that US investors’ interest in green investing is waning due to repeated attacks on “woke capitalism”.
Scepticism towards ESG investing is likely compounded by the poor performance recently by technology stocks — a sector that green funds typically favour.
Alternative investments, or “alts”, are gaining popularity and finding their way into the portfolios of everyday investors.
These investments, which include hedge funds, private equity, venture capital, cryptocurrencies, commodities and rare collectables, have little or no correlation with traditional asset classes like stocks and bonds, providing investors with more diversification options.
The alternative investment industry gained momentum and accessibility after the economic downturn in 2008. With last year’s volatile stock market and the anticipation of slower growth and persistently high inflation, demand for alternative investing continues to rise.
Previously, alternative assets were only easily accessible to sophisticated investors. However, the growing number of alternative exchange-traded funds (ETFs) and managed funds are making them more mainstream, as investors look beyond conventional asset classes for returns in an unpredictable year.
The coming general election is poised to have a significant impact on New Zealand’s capital markets.
Current polling suggests Labour v National could be one of the closest contests in some time, and likely to hinge on the decisions of kingmaker coalition parties — potentially Te Pāti Māori or New Zealand First.
Elections are viewed as significant risk events for market participants due to the potential changes in government policy and associated uncertainty.
It is already clear that wealth inequality, tax and inflation will feature prominently in the upcoming political debates and investors will be closely assessing the policies, platforms, and “bottom lines” of parties, and their wider implications for the economy and capital markets.
In the lead-up to October 14, the stage is set for a period of increased fluctuations in share prices and currency value, and uncertainty in the capital markets.
Project Auckland panel: Simon Bridges, Viv Beck & Mark Thomas
NZ Herald’s Tim McCready leads Heart of the City CEO, Viv Beck, Auckland Chamber CEO, Simon Bridges and Committee for Auckland Director, Mark Thomas in a discussion on the pain points plaguing Auckland’s infrastructure.
Project Auckland: Lessons come flooding in from three Auckland councillors
Tim McCready asks three Auckland councillors what they have learnt after recent floods.
Desley Simpson became the public face of the crisis when she stepped forward to support mayor Wayne Brown by providing emergency updates and responding to media queries.
The Ōrākei councillor, who is a clear communicator, reassured Aucklanders that a coordinated response was in place — although she acknowledges getting the information together in time for briefings wasn’t always easy.
“I was trying to bring multiple pieces of information together,” Simpson says. “What I found the most challenging was that I became the public face of what was going on, and there wasn’t one source of truth.
“It was Auckland Transport, Watercare, planning staff. I had to go to multiple sources to find out bits of information. That shouldn’t happen, we need to be better prepared for all eventualities.”
Simpson says we need to rethink how we understand and manage risk in New Zealand. “It is very easy to be reactive with short-term thinking. We have got to look at dealing with investment into resilience much better.
“It is going to be expensive, and it is often difficult to do.”
Meteorological services were forecasting heavy rain in Auckland in advance of the flood. But they said the record rainfall couldn’t have been predicted.
Simpson says though this is the case, managing risk and resilience can help New Zealanders prepare for a range of possible consequences. “If we can prepare that something will go wrong at some stage, then we can prepare for that eventuality.
“If as a society we had been thinking this way, then perhaps our infrastructure deficit wouldn’t be what it is, and we might have better considered the cost of infill housing on our stormwater infrastructure,” she observes. “We probably would have had a second harbour crossing a long time ago and plans for climate change and managed retreat would be well advanced.”
Simpson says there are a lot of LIMs (land information management reports) in Auckland that show a risk of flooding. But planners have not been inhibited from increasing housing density, even though the risk shows the density sometimes exceeds infrastructure capacity.
“I think there is a real risk around that, and from my personal perspective, I’d like to put a stake in the ground and say ‘hold on — let’s stop’.” She suggests a “digital twin city” model could be a possible solution to help with future planning. This is where a digital computer model of a city simulates how urban upgrades would impact water flows, traffic and provide other intelligent feedback.
Because everyone shares the same data, a digital twin city would also allow service providers to share data and ensure that work is co-ordinated.
During the devastating floods, Josephine Bartley realised the severity when she was inundated by messages on social media from community members whose homes were being filled with water, and who had no idea what to do or where to go.
“I was being sent videos of people swimming in the street, and even though they only know me through Facebook, they thought I might be someone who could help them.
“They were scared, and I was scared. But I was trying to be strong for them, to give them direction to get out of their homes.”
The second term councillor for Maungakiekie-Tamaki quickly emerged as a powerful voice — not just for her own ward, but for other parts of Auckland — particularly those with a high proportion of Pasifika residents.
She says that while south Auckland residents were poorly supported by official channels and in some cases couldn’t be reached by emergency services, communities came together to help one another.
Bartley went to the Māngere evacuation centre, set up under the leadership of Manukau Councillor Alf Filipaina and the local board.
“We worked with what we had. The community came together to help each other and that is what made all the difference. I shared a video from the venue on social media and the community contacted me and came through. Even the local psychologist joined us to spend time with the traumatised families.”
To be better prepared for future events, Bartley emphasises the need to improve local plans and make them more accessible to the community.
“People need to have in the back of their heads: ‘if this happens, we go here’. We have to get to the stage where people don’t rely on emergency services but will be ready to help their own family immediately.”
She points out that Civil Defence and bureaucracies often fail to understand the unique needs of specific communities. Providing an empty building as an evacuation centre is not enough and doesn’t account for the different cultural and social requirements that are needed in the community.
Bartley’s leadership caught the attention of international media. While still based at evacuation centres, Bartley spoke with international outlets Fox News, BBC World News, Pacific Media Network and others, sharing updates on the emergency situation in Auckland and insights into the ongoing community efforts.
During the floods, Julie Fairey was unable to leave her house — she had three children at home and a broken arm which made driving and lifting things impossible.
But as one of the two representatives for Albert-Eden-Puketāpapa, Fairey still had an active role in flood response work.
“I was completely useless outside,” she says. “So I worked to get better communication out to the community, because particularly in the first week, council unfortunately didn’t do a great job.”
Her role became keeping Aucklanders informed of the evolving situation through her social media channels, answering frequently asked questions and logging jobs that came in from residents into the relevant system so they could be addressed.
“I ended up triaging but also directing welfare requests to the local MPs’ teams. A lot of them had people out door-knocking on the ground — it’s something they’re good at. They turned that around into checking on people and going through the areas where people had been worst hit.”
The Albert-Eden-Puketāpapa ward is one of the most diverse in Auckland, covering an area that includes Mt Eden, Greenlane and Epsom across to Waterview, Mt Roskill and Lynfield. She says there was a big difference between parts of the community where people didn’t have a lot of access to resources and the parts where people were quite capable to get on the phone to their insurance and escalate things through council to get the help they needed.
“A lot of our response was about how we direct resources. Councillors Josephine Bartley and Angela Dalton got in touch several times to say they had some resources they could share, or to connect people up with relevant community groups on the ground that could check on people or provide supplies or emergency accommodation.”
To improve the council’s preparedness for future events, Fairey stresses the importance of improving its emergency management communications. “That was apparent on the day of the event, but also after.”
She says the council’s communication system with elected members during the Covid pandemic was a good example of effective communication. This provided regular updates with critical information, ensuring everyone was kept informed and that communications were aligned.
“After the floods it took too long for that system to reactivate,” Fairey says. “It is widely acknowledged that we should have that ready to go — maybe not right away when we don’t know how severe things are — but within the first 24 hours.”
Fairey says the flooding demonstrated elected members can be a great asset to get information out to residents. “But we can only tell people what we know.
“After a couple of days there was an acknowledgement that we were not in the way, but we were a very useful communications channel.”
A comprehensive emergency recovery plan to help rebuild the region and better prepare Aucklanders for future weather events is under way.
“It’s been more than a month since our region was hit by a horrible one-two punch – the Auckland Anniversary floods and then Cyclone Gabrielle and we still have a lot to do to help our hardest-hit communities,” said Auckland mayor Wayne Brown, who has labelled the plan the Big Auckland Fix Up.
Brown has asked Auckland Council CEO Jim Stabback to initiate a rapid assessment of flood risk areas to identify simple fixes and then carry out the necessary programme of work in consultation with Watercare and Auckland Transport.
He’s also tasked local boards to identify five main trouble spots and fixes in their area.
Brown then plans to visit these sites with relevant engineers to progress work. The mayor has identified several simple fixes to reduce flooding risks:
1. Clear streams and open drain channels on public and private land.
2. Lower non-arterial roads over constricted drains and waterways.
3. Build and improve turn-offs to utilise public stormwater storage in public parks and other areas.
4. “Daylight” streams in places where they are enclosed in pipes or narrow paths to create floodplains and reduce flooding of residential areas.
Brown says it’s obvious that Auckland must get better prepared for severe weather events and needs to rebuild local capabilities and response plans that have fallen into disrepair over the last six years and look at how we forecast and model flooding so we can provide better intelligence to the public.
“We need to restore and rebuild our broken roads, bridges, water system and buildings in a way that will make communities stronger and more resilient, and we need to address land use planning and building regulations.
“Recent events exposed problems in where and how some houses have been built in Auckland. In some cases, the government or courts have constrained council’s ability to regulate, and this will need to be addressed. The council must be able to say no and plan for infrastructure, as managed retreat is a last resort option.”
Project Auckland: Cyclone and flood deluge brings ‘a wake-up call’
Auckland Councillor Richard Hills says the recent Auckland floods and cyclone have been a big wake-up call for politicians and communities to reduce emissions and adapt to climate change.
Hills discount those who say climate change is already here and we should solely focus on adaptation.
“This is a one-degree world. If we add two or three degrees onto this, we will face catastrophe.”
The third-term councillor chairs Auckland Council’s planning, environment and parks committee.
He put an extraordinary item on the committee’s agenda in early February to commission work into the implications of the flooding on Auckland’s land use planning, regulatory, infrastructure and other policy settings.
“While we’re talking about a one in 200- or 250-year flooding event — or a half a per cent chance of this happening in any given year — we know from Te Tāruke-ā-Tāwhiri: Auckland’s Climate Plan that we need to adapt and be more resilient because this is going to happen more often,” says Hills.
“When I led that plan in 2020, it was considered 10-20 years away but unfortunately it is here now. We had a two-year drought followed by the wettest winter, wettest summer, wettest January, wettest day. As well as that, the last eight years have been eight of our hottest ever.”
The planning review will consider what measures were effective in preventing and mitigating the impact of the floods.
Hills says this is important to avoid knee-jerk decisions which tar all forms of intensification.
He points to the Te Ara Awataha greenway in Northcote as an exemplary development where underground pipes were resurfaced to follow the path of the original Awataha Stream. Sections of the stream were opened and replanted in a process called daylighting that rejuvenates buried urban streams.
“We could only do that because Eke Panuku, Healthy Waters and Kāinga Ora all worked together,” says Hills. “They demolished the homes in that area of Northcote so we could re-channel everything — and it didn’t flood. We don’t have that luxury in every community but it shows what happens when we do intensification well with the right infrastructure alongside it.”
Hobsonville and Stonefields fared well during the flood compared to some of the worst hit more established suburbs of Mt Eden and Mt Albert.
“Our biggest emissions come from transport, so it will be important to act there. But the flooding has raised questions about where any future rail or light rail to the North Shore would go,” says Hills.”
During the January 27 event, major sections of Auckland’s motorways were flooded or closed. On the Northern Motorway, people were trapped in cars that were floating along rising floodwaters.
“Is the busway the best place to put rail? Or is it better to be higher,” he questions. “We need to think about everything — not just because the infrastructure might flood, but also will people be living in low-lying areas in the future?
“If we think that people will ultimately move away from those areas, then we need to plan ahead for that.”
Hills was in the thick of it during the January 27 flooding. He used his social media channels to implore residents to stay out of floodwaters and check on their neighbours, share information about evacuation centres, and remind people to stay prepared by filling water bottles and charging their phones.
Hills is one of the most-followed councillors on social media. He spoke with Tātaki Auckland Unlimited early about cancelling the Elton John concert when it was obvious Auckland was facing a severe weather event. The promoters didn’t cancel the concert until shortly before the superstar was due to take to the stage at 7pm, stranding thousands of people at Mount Smart Stadium. Hills’ focus then turned to Auckland Transport, requesting they mobilise all available buses to get people home.
“It was all pretty chaotic and upsetting,” he says. “People were contacting me, ringing me, and sending social media messages. In that kind of chaos, people just need any information so if I could help that is what I was trying to do.”
Over the weekend that followed, it was obvious to Hills that flood-damaged property needed to be urgently dealt with.
“Council’s advice was that insurance needed to deal with rubbish, but if we waited on that then we would have a major health crisis. In some roads in Milford and Sunnynook, there were entire households worth of waste piled up on the berm. We were worried about more rain events coming and debris floating away.”
Hills organised the first public rubbish skips in concert with the local board.
In the days that followed, he took mayor Wayne Brown to the North Shore to see damaged houses before later meeting with Prime Minister Chris Hipkins, Auckland Minister Michael Wood and Auckland Central MP Chlöe Swarbrick.
Project Auckland: Opportunity costs lie in flood and cyclone response
The recent weather events that battered Auckland have left the city with significant damage to public and private assets, including infrastructure, land, houses and businesses which will take a lot of work to put right.
Auckland Council chief economist Gary Blick says the city is worse off and while there will be a bump in activity to put the damage right, it will not necessarily mean Auckland is further ahead, with funding and capacity constraints leading to other projects – and their benefits – being deferred.
“Economists think about the opportunity cost,” he says. “What are we forgoing by having to turn our limited resources – labour, capital, equipment – into putting things back.”
As chief economist, Blick is focused on the medium to long-term implications of decisions that are made by the council. His approach to economics is broad, considering trade-offs in resource use as well as the wellbeing of the community.
Recent events have revealed the need for the city to consider its policies for managing future natural disasters and climate change and have focused policy debate on Auckland’s resilience.
Blick says it is important to be quite considered and have a good evidence base around causality and impacts.
“If we are going to take a policy action, we have got to consider all of the impacts on our resources and the associated trade-offs,” he says. “As an example, adapting to the changing climate and natural hazard risk in a way that doesn’t undermine our other objectives such as accommodating growth, enabling more housing, and reducing transport emissions. And we want to respond in a way that is consistent with financial sustainability and the prudent use of public funds.”
Given the evidence of how natural disasters can impact on mental health, Blick has been reflecting on the potential impact of weather damage on the wellbeing of Aucklanders. “Particularly for younger people, and the disruption it can have on their home life and their engagement with education, training and employment pathways. We are trying to get a good evidence base around that in terms of characteristics of affected households and their potential vulnerabilities.”
Blick is particularly interested in Auckland’s ability to accommodate growth, and its long-term competitiveness and attractiveness to current and prospective residents. With this in mind, he is closely watching Plan Change 78 – the council’s response to the Government’s National Policy Statement on Urban Development – which is now before an independent hearings panel. The initiative was created from a cross-party law in late 2021 when National and Labour collaborated to bring about significant modifications to the existing plans for major urban areas, leading to big changes to the Auckland Unitary Plan.
Some of these include requiring the council to enable buildings of six storeys or more within walking distance of the city centre, large metropolitan centres and around rapid transit stops. It also enables three-storey housing to be built on most residential sites in urban Auckland.
In the aftermath of the January floods, some councillors have expressed concerns about the impact of new housing density laws, fearing multi-storey residential buildings could further strain the already-overburdened infrastructure.
Blick acknowledges the weather events have highlighted challenges that will need to be addressed in policy settings on land use and infrastructure investments. He notes these are discussions many international cities are grappling with, particularly in coastal or flood-prone areas.
Such decisions can have significant and far-reaching consequences for Auckland’s growth patterns. It is Blick’s responsibility as the city’s chief economist to consider and advise on the full range of consequences.
Land use policy and transport infrastructure investment are big, powerful levers for a city’s attractiveness, Blick observes. They influence where households can locate, the accessibility of different locations, and the decision-making of people in New Zealand and overseas who are considering relocating.
“More flexible land use gives households more choice, and the option to locate in locations that are in relatively high demand due to their proximity to jobs, transport links and other urban amenities.”
Enabling more people to locate closer to the things they value is positive for wellbeing and productivity and improves Auckland’s competitiveness in comparison to other cities and regions.
The Auckland Unitary Plan shows the power of changes in land use policy. Upon its implementation in 2016, it increased Auckland’s capacity to accommodate growth and allowed land in some locations to be used more intensively.
Research conducted by the University of Auckland has analysed the impact of the Unitary Plan by modelling the counterfactual if it hadn’t been introduced. The study found that over the first five years, the Unitary Plan led to the construction of an additional 26,900 dwellings, 50 per cent more than otherwise.
“This really shows how powerful land use policy can be, and so potential changes need to be carefully considered,” Blick says. “People may notice changes in some neighbourhoods and some people may not feel entirely comfortable about it.
“But we also need to consider where we’d be without those extra homes and where those households would otherwise locate. Enabling the market to deliver more homes in response to the demand has been a positive step for improving housing affordability over the medium term.”
Looking ahead, this will help Auckland retain its competitive advantages. “Auckland still offers a diverse range of employment opportunities, specialised roles, higher income prospects, urban amenities and consumption possibilities not available in other regions,” Blick says.
Project Auckland: International cities show how to soak up stormwater
In 2015, China implemented a concept known as “sponge cities” in 16 urban areas to combat flooding caused by stormwater.
The initiative was in response to the devastating Beijing flood in 2012, which claimed 79 lives and prompted authorities to make sponge cities a nationwide policy.
The idea was promoted by Chinese landscape architect Yu Kongjian, who advocated for the integration of nature’s ability to absorb, store and filter water into city infrastructure to mitigate against runoff.
This approach involves using green infrastructure to allow water to follow its natural channels, with streams and creeks uncovered, parks and grasslands restored, and planting used to slow down the flow of water and enable natural absorption, infiltration and purification. This is in stark contrast to the conventional grey infrastructure solution that speeds up the flow of water using pipes and drains.
Qunli stormwater park, in the northern Chinese city of Harbin, is an example of the concept. The park collects, filters and stores stormwater, and has become a popular urban amenity for recreational use. Capable of retaining and filtering up to 500,000 cubic metres of stormwater, the park has solved the stormwater inundation issue for an area 10 times its size, spanning over three kilometres.
The success of the initial pilot has seen a further 14 cities in China adopt the idea of sponge cities, including Shanghai, Shenzhen and Beijing, and has seen the concept grow in interest in other international cities.
In Auckland, the concept of sponge cities has also been put into practice. One example is Stonefields, with its large tiered floodable park, created by preserving some of the existing wetlands and preventing floodwaters from flowing into properties during heavy rainfall.
Another example is Te Auaunga Oakley Creek, a Healthy Waters project in Mt Roskill.
Te Auaunga is one of Auckland’s longest urban streams, winding its way from Hillsborough through Mt Roskill, Owairaka and Waterview to the Waitematā Harbour. The creek has breached its banks during heavy rainfall, but that is part of its design — the connected parks collect excess stormwater and slowly release it back into the creek, preventing flooding for nearly 200 homes.
On a smaller scale, New York City has implemented pocket rain gardens to help manage its stormwater. These tiny gardens help with the natural absorption of rainwater into the ground instead of allowing it to flow into the sewer system. Strategically located, the pocket rain gardens are installed in areas where their impact on the health of the city’s waterways will be most significant.
Thorough soil testing is conducted before installation to ensure the pocket gardens can efficiently absorb stormwater. The area is then excavated to a depth of around five feet (1.5m) and backfilled with stone and soil, with the kerb replaced with one that allows water to flow in and out. Appropriate plants, flowers and trees are then selected and planted in the area.
The benefits go beyond stormwater management. They help to combat the urban heat island effect, clean the air, promote biodiversity and beautify neighbourhoods.
Tokyo, a city built on a flood plain and crossed by five river systems and dozens of individual rivers, has taken a unique approach to risk mitigation. In 1992, construction of the Tokyo Metropolitan Area Outer Underground Discharge Channel began in the northern Saitama Prefecture on the outskirts of the city.
Over 14 years, the world’s largest underground floodwater diversion facility was built to counteract the overflowing of city rivers during intense rain and typhoon seasons. The system’s tunnels and chambers run for 6.3km east to west, featuring 18m-high concrete pillars that create a cathedral-like space underground.
Before it was constructed, the water level from rivers used to flood a large area. The facility is activated around seven times a year, and allows Tokyo to divert and store water in the underground channel, and pump it into the larger Edo River at a rate of up to 200 metric tonnes of water per second.
The facility proved its effectiveness during Typhoon Hagibis in 2019. The artificial caverns were able to take in more than 12 million cubic metres of water, saving Greater Tokyo from an estimated 26.4 billion yen ($330 million) in damage.
The Netherlands’ second-largest city, Rotterdam, is home to the DakAkker, a farm on top of a roof covering a massive 1000 square metres.
The roof holds a thriving garden filled with fruit trees, vegetables, flowers and herbs. Bees are kept and even chickens wander around. It is one of the largest rooftop farms in Europe, capable of collecting 60 litres of rainwater per square metre.
A portion of the farm’s roof has been transformed into a smart roof that can respond to heavy rainfall predictions.
The system can make extra water storage capacity in advance of a rainfall event by releasing water slowly up to 24 hours ahead of the rain, giving it the capacity to handle heavy downpours more effectively.
Over the past decade, Rotterdam has transformed rooftops across the city, with green roofs installed on thousands of buildings, covering about 330,000sq m, or around 2 per cent, of the city’s flat roof space. These green roofs are playing a crucial role in keeping water out of the city’s ageing stormwater system and preventing flooding.
Rotterdam residents can apply for subsidies to create these green roofs and install water retention systems. The smart technology being trialled on Dakakker’s smart roof could ultimately be expanded across the city, so water levels on rooftop storage tanks could be co-ordinated to empty when rain is forecast, allowing them to be fully operational during heavy rain events.
In 2013, Rotterdam built the Benthemplein “water plaza” with a similar goal. The plaza is sunken into the ground, with a sports area in the centre accessed by steps. During heavy rain, the plaza collects runoff and stores water to dissipate safely.
“Instead of making bigger sewer pipes, we chose to invest in redesigning public space in a way that contributes to a nicer, better, more attractive district,” says Arnoud Molenaar, Rotterdam’s chief resilience officer.
Engineering consultancy Arup released its Global Sponge Cities Snapshot in 2022, which examined the amount of green space and permeable soil in major cities. Auckland was ranked the spongiest city, given its lower urban density and high level of green space areas.
1 Auckland — 35%
2 Nairobi — 34%
3 Singapore — 30%
3 Mumbai — 30%
3 New York — 30%
3 Toronto — 30%
4 Montreal — 29%
5 Shanghai — 28%
6 London — 22%
7 Sydney — 18%
I had the fun job last night of moderating a panel with Auckland’s Deputy Mayor Desley Simpson and Councillors Josephine Bartley and Julie Fairey for the Onehunga Business Association. It was a wide-ranging conversation covering the budget, flooding, transport, rates, congestion, bus cancellations… But a couple of things stood out to me:
1. These three Councillors, while covering the full political spectrum, have each other’s backs and want to support each other – this was evident right throughout the panel discussion.
2. The recent weather events had a significant impact on them. They knew the people who lost their lives and were open about how these deaths affected them.
3. My final question to the panel was to ask for something positive for the year ahead. It’s nice to remind ourselves that not everything is bleak all the time!
4. Deputy Mayor Desley Simpson does a fantastic ghost impersonation (hear it between 1.01 -1:23) 👻 👻
Listen via Onehunga FM’s ‘Too Much Talk’ podcast in the link below