Queensland’s floods are so huge the only way to track them is from space.

Many parts of Queensland have been declared disaster zones and thousands of residents evacuated due to a 1-in-100-year flood. Townsville is at the epicentre of the “unprecedented” monsoonal downpour that brought more than a year’s worth of rain in just a few days, and the emergency is far from over with yet more torrential rain expected.

Monitoring the whereabouts of floodwaters is vital for protecting infrastructure.

Such monumental disruption calls for emergency work to safeguard crucial infrastructure such as bridges, dams, motorways, railways, power substations, power lines and telecommunications cables. In turn, that requires accurate, timely mapping of flood waters.

For the first time in Australia, our research team has been monitoring the floods closely using a new technique involving European satellites, which allows us to “see” beneath the cloud cover and map developments on the ground.

Read the piece from The Conversation by Professor Linlin Ge from the University of New South Wales - “Queensland’s floods are so huge the only way to track them is from space.”

More than trees needed to bring wildlife back to our cities

The federal environment and acting cities minister, Greg Hunt, on Tuesday pledged to increase the number of trees in Australian cities. In a bid to fight higher urban temperatures, the plan will set targets for tree cover.

This is part of a green revolution spreading through the world’s cities. From New York to Singapore, urban areas are undertaking bold “greenspace” initiatives – removing concrete and allowing trees and vegetation back in.

Some of the benefits include replacing the ugly infrastructural trappings of vehicles and motorways as well as cooling cities, absorbing air pollution and minimising runoff. These greenings further have mental health benefits, by bringing residents and visitors alike back into contact with the land.

Read the piece on The Conversation by Adjunct Professor of Global, Urban and Social Studies at RMIT University, Peter Fisher - “Concrete jungle? We’ll have to do more than plan trees to bring wildlife back to our cities.”