Tomorrow's cities rely on connecting infrastructure today

Australians are among the most urban people on the planet. Almost 88 per cent of us live in cities and large towns, and that share keeps climbing as migration and internal movement concentrate the population in our capitals. The same shift is playing out worldwide: the United Nations and World Bank expect roughly 68 per cent of humanity to live in urban areas by 2050, up from about 57 per cent today.

That concentration is colliding with a changing climate. Heatwaves, bushfires, floods and drought are arriving more often and hitting harder, straining water, power and transport networks that were never designed for these conditions. Residents, understandably, expect services to hold up and quality of life to improve.

Much of our infrastructure has already been renewed and digitised to cope with present demand. Yet even modern assets, managed in isolation, struggle with overlapping pressures such as rapid population growth and extreme weather. A more joined-up approach to planning and operating these networks can change that. By bringing the management of separate physical systems into a single view, cities can lift efficiency, resilience and sustainability together rather than one at a time.

Synergies build resilience

Water utilities are often the largest electricity customers in their region. With data centres multiplying across our cities and drawing heavily on both power and cooling water, coordinating the two matters more than ever.

Tasmania's TasWater shows what becomes possible. The utility runs one of the country's oldest networks, with more than 70 drinking water systems and thousands of kilometres of mains monitored through many separate control systems. Leveraging technology, it pulled that fragmented data into a single source of truth. A compliance check that once took an engineer the better part of a day each week now runs automatically in about 15 minutes, and the utility flags every potential breach of its critical control points, helping it meet the Australian Drinking Water Guidelines. After a damaging sewage spill, TasWater used the same data foundation to detect blockages early, cutting its response time to spills by around 13 hours, sparing local waterways and oyster farms.

The same logic extends across energy, water, telecommunications, waste and transport. Connecting these sectors along a shared data thread removes silos, cuts duplication and makes better use of scarce resources. In practice that means linking transport and energy systems to smooth traffic flow and support electric vehicles; sharing asset data between water and power utilities to trim energy use and shore up supply; and tying waste collection to transport networks to plan efficient routes and reduce fuel and emissions. Pool the operational data, and operators can read current conditions, anticipate demand and flatten the peaks that drive cost.

One view across the system

Enabling that collaboration is the newest piece of infrastructure: an integrated command centre that draws internal and external services into one operating picture. Within a single interface, this "system of systems" combines live data from many sources so issues can be spotted and resolved before they surface.

Australian operators are already heading this way. In the Northern Territory, Power and Water Corporation manages water, gas, electricity transmission and generation across one of the country's most dispersed service areas, and is bringing all of it under a single unified data infrastructure, from remote dam monitoring to urban energy distribution.

And in Western Australia, the Kwinana industrial cluster is one of the world's leading examples of industrial symbiosis, where neighbouring plants trade by-products such as energy, water and materials. The Kwinana Industries Council facilitates more than 170 of these exchange contracts among 54 companies, and a digital collaboration featuring Schneider Electric and others is looking to add an industrial intelligence layer to visualise and optimise those flows, helping the cluster lift resource efficiency while cutting waste and emissions.

These are the building blocks of a smarter region: real-time insight that helps authorities match supply with demand and make sharper decisions in an emergency.

Future-proofing our cities

Governments everywhere face the same intersecting pressures: a changing climate, ageing assets, shifting labour markets and tighter budgets. A system-of-systems approach offers a backbone for tackling them at once. Breaking down silos and encouraging cross-sector collaboration future-proofs operations, frees up innovation and makes better use of every dollar and every litre.

None of this is effortless. Integration means working through regulatory hurdles and technical interoperability, and finding financing models and policy settings that support long-term investment. But the payoff is increasingly clear. When agencies work from the same information, problems are caught early, costs and resources are saved, and reliability improves. A connected, efficient approach also lightens our environmental footprint and lifts the quality of urban life.

For Australia, where so much of the population lives in a handful of coastal cities, investing in integrated and intelligent infrastructure is one of the surest ways to build places ready for the needs of this generation and the next.