Lessons from South Australia’s blackout: we need to make infrastructure more resilient to climate change


Mark Gibbs, Queensland University of Technology

Last week’s storm and subsequent state-wide blackout in South Australia reminds us how important the electricity grid – and other infrastructure – is for our communities.

Immediate analysis suggests the blackout was caused by the collapse of transmission infrastructure in South Australia. Australian electricity networks, like most transmission networks worldwide, rely on above-ground conducting wires held aloft by large towers. Some of these towers were blown over in the South Australian event.

While the storm hasn’t yet been specifically linked to climate change, it also serves as a reminder of the increasing challenges of delivering essential services in a more variable climate and slowing economy.

Power, water, transport, health, defence and communications infrastructure can be exposed to climate variability and change simply because of their long lifetimes. Therefore, many if not most owners and operators of essential infrastructure have commissioned climate vulnerability and adaptation studies.

There are many good examples of adaptation. For instance, Queensland Urban Utilities, the major water distributor and retailer in south-east Queensland, is implementing a large program to make the water and wastewater delivery network more resilient to flooding.

But there is increasing recognition among climate adaptation researchers that many of the recommendations from climate adaptation studies aren’t being adopted. This is sometimes referred to as the “plan and forget” approach to climate adaptation and it leaves critical infrastructure vulnerable to weather extremes.

Speaking different languages

One of the less obvious reasons for lack of uptake is the difference in language used in the climate science and adaptation community and in the infrastructure community.

All technical disciplines develop their own specialised language and climate science is no exception. But planning for climate change means that infrastructure professionals have to apply climate science to engineering planning and design.

Both disciplines use risk management as a common framework for assessing and managing risks. But the “bible” of climate science, the Intergovernmental Panel of Climate Change (IPCC) process, has invented new definitions of risk.

These differ from the long-standing definitions of risk enshrined by the International Organisation for Standardization and widely used by the engineering and infrastructure community.

Many engineers find they cannot use the IPCC reports and projections because this information cannot be directly integrated into planning and design processes that are often heavily regulated and prescribed.

By necessity, climate projections are based on probabilities that specified environmental conditions may occur.

By contrast, engineering design is often based on a specified extreme number, whether it be a maximum wind strength or flood height, rather than a set of probabilities.

Over time it is expected that engineering design methodologies will be able to assimilate climate projections, but updating these highly prescriptive standards can be a drawn-out process.

Harder, better, faster, stronger

Often the most common recommendations in infrastructure climate adaption studies are to make infrastructure stronger, higher and, by implication, heavier and more expensive. A common example is a recommendation that bridges be elevated and made stronger to account for expected higher flood levels and water flows.

While this is understandable, it is in stark contrast with the way almost all other products are being developed – lighter, faster, cheaper, smarter.

Australia is also consistently either at the top, or near the top, of the infrastructure cost league table. It’s one of the most expensive places to design and construct infrastructure worldwide.

Therefore, climate adaptation recommendations to make infrastructure more resilient through brute strength can be difficult to fund – although, in some cases, this may be the only viable option.

Getting creative

We need to think a little more creatively. A good starting point is to take the approach advocated in the relatively new international asset management standard called the ISO 55000 standard.

A key part of this standard is not to think about infrastructure assets in isolation, but to consider how each asset contributes to an essential service, such as providing electricity to our homes. After all, infrastructure assets are only constructed to deliver a service. It is the service that is key, not just the individual asset.

Importantly, the demand for services, levels of service and the way essential services will be delivered in future decades is all largely unknown. Technology will change how essential services are defined and delivered.

Distributed energy – such as rooftop solar – may reduce the need for extensive transmission networks. Smarter combinations of light rail and autonomous vehicles may change demand for major road infrastructure.

New water-treatment technology, such as within-pipe treatment, may do away with the need for large treatment plants that are often located in low-lying regions exposed to sea-level rise.

Climate adaptation needs to stop recommending that existing infrastructure just be built stronger and higher, and take a broader and smarter perspective of what infrastructure may be required as climate change increasingly makes its presence felt.

The Conversation

Mark Gibbs, Director: Knowledge to innovation. Chair: Green Cross Australia, Queensland University of Technology

This article was originally published on The Conversation. Read the original article.

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How green is our infrastructure? Helping cities assess its value for long-term liveability


Roger Jones, Victoria University; Celeste Young, Victoria University, and John Symons, Victoria University

Australian cities score high in liveability awards. Melbourne has topped The Economist’s most liveable cities ranking five years in a row, with Adelaide, Sydney and Perth not far behind and Brisbane in the top 20. Australian cities rank well in other liveability surveys, too, if not so highly. Environment is one of the key factors that these surveys measure, but the data and methods being used are not very sophisticated.

Green infrastructure is a key contributor to these rankings. The networks of green and blue – taking in rivers and streams, parks, green wedges, gardens and tree-lined roads and rail – underpin urban liveability.

Yet, if we look at these valuable assets, they are mainly historical legacies of the 19th century. They include The Domain, Treasury-Fitzroy Gardens and Royal Park in Melbourne, Hyde and Centennial Parks in Sydney, King’s Park in Perth, the Adelaide Parklands and those in Brisbane, Hobart and Canberra.

Their creation was driven mainly by visions of what a city should look like and provide for its people. This was long before the invention of cost-benefit analysis and many of the other tools used to make the economic case for infrastructure.

Future-proofing urban environments

Today, if a key parcel of land is up for development, green infrastructure is often an afterthought, if considered at all. The recent reports that the former Victorian government rezoned Fishermans Bend, a former industrial site of 455 hectares, without proper regard for grey or green infrastructure are not unique.

In an area threatened by sea-level rise, increased flooding and heat island effects, to allow development that exacerbates these issues is extremely short-sighted.

But this is happening in many localities. Changing climate and the unintended consequences of small decisions, such as urban infilling, are making cities hotter, more prone to flash-flooding and less green.

Rain gardens have aesthetic and practical value as they reduce urban flooding by slowing water run-off.
shutterstock

Local government authorities are on the front line with these issues. They carry the major burden of responsibility for developing and maintaining neighbourhood environments. Over the last few years, some councils have considerably increased spending on park renewal, rain gardens to slow runoff, water capture and recycling and urban forest strategies.

However, this is occurring in an economic environment where local government’s resources are limited and efficiency is emphasised at every turn. State governments run on a platform of capping rates, not considering whether those rates reinvested by council generate ongoing socially beneficial returns.

When communities are asked what they want councils to invest in, green infrastructure is usually high on the list. Local government has recognised these pressures, identifying the need to build better business cases for green infrastructure projects and programs in order to justify their expenditure.

Finding better ways to value green assets

A recent collaborative project, involving four metropolitan Melbourne councils and Victoria University, has put together a framework to help local government identify the benefits of green infrastructure over its whole lifecycle.

The aim is to build better business cases to support projects and develop asset management programs for green infrastructure. This would lead to trees and parks being considered in a similar way to roads and buildings as assets that provide a stream of benefits to the community over their lifetimes.

Valuing the benefits of green infrastructure is tricky, though. This is because each element provides multiple benefits, which cover very different types of value.

For example, a wetland can provide flood protection, substitute for external water supply, cool an area, increase biodiversity, provide recreational opportunities and contribute to adjacent property value. These wetland benefits are public, private and intrinsic.

High-quality open space can contribute to people’s physical and mental health and wellbeing. This has the results of offsetting medical costs and promoting higher economic productivity and improved human welfare (happiness and satisfaction). Putting a dollar figure on all of these benefits is extremely complex.

The long-lived aspect of green infrastructure also means it can play a major role in adapting to changing climates within urban environments. The future value of flood protection, cooling services, amenity, recreation and human health and welfare can be substantial.

However, current methods of discounting future dollar benefits, at roughly 5% each year, undervalue these long-term benefits. A recently completed project in Melbourne’s west identified the potential for welfare and environmental benefits exceeding A$300 million over 30 years (discounting at 3.5%) by reducing pollution from an industrial precinct using integrated urban water management principles.

The framework is a starting point for councils to address the economic value of green infrastructure. It is different to most other frameworks, with the emphasis not being on how to select the type of infrastructure, but on how to get a project or program valued, approved and implemented. It has been tailored to existing council processes so it can be used now, but also grow as council programs evolve.

One major gap that our work has pointed out is the lack of available data in Australia to measure green infrastructure benefits with confidence. They are there, but it would be great to rate liveability with confidence and to have it on the same footing as income or GDP.

The Conversation

Roger Jones, Professorial Research Fellow, Victoria University; Celeste Young, Collaborative Research Fellow, Centre for Strategic Economic Studies, Victoria University, and John Symons, Research Fellow in the Victorian Institute for Strategic Economic Studies, Victoria University

This article was originally published on The Conversation. Read the original article.

Hunter Region Botanic Gardens


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Southern Wetlands

ABOVE: The Southern Wetlands Boardwalk – Hunter Region Botanic Gardens

Late last week I decided I should do something with the final day of my annual leave that I had taken this time round, so I thought I’d pop into the Hunter Region Botanic Gardens near Raymond Terrace in New South Wales, Australia. I had been here before, but that was a long time ago. I wasn’t impressed on that first visit, so after more then a decade had it improved? Well that was the question I was keen to answer.

Rotunda

ABOVE: The Rotunda  BELOW: Succulents Section

Succulents

There was a $4.00 ‘escape’ fee, which would allow a token to be purchased and then the boom gate would rise once it was placed into the proper slot at the exit. So no entrance fee, just an exit fee. I was willing to pay this for a quick look and…

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ELECTRIC CARS COMING SOONER RATHER THAN LATER


In great news for the environment and consumers it seems that ‘green cars’ will be arriving in Australia sooner rather than later, with infrastructure for electric cars to be set up in Brisbane, Sydney and Melbourne within four years. The project is a joint venture between AGL, Macquarie Capital and Better Place.

The project aims to set up recharge stations for electric cars at workplaces, homes and shopping centres. It is thought that some 250 000 recharge stations will be built in the project. Such projects have already been set up in Israel and Denmark.

Macquarie Capital is to raise $1 billion to build the recharging network, with AGL to supply renewable energy for the project. Better Place will actually build the network.

Should the project go ahead and the infrastructure be built, motorists will be able to dump petrol and diesel vehicles and move to electric ones. This will of course be a great relief from rising fuel costs and help protect the environment from further greenhouse gas emissions.