Category Archives: Cities Response

PLEA Network

22 October 2015, The Guardian. Perth’s double whammy: as sea levels rise the city itself is sinking. The city’s growing population means a growing demand for water, but as more and more water is drawn out of Perth’s acquifers, the land is slowly subsiding. Growing demand for water in Perth has caused the city to sink at up to 6mm a year and could be responsible for an apparent acceleration in the rate of sea level rise, according to new research released by Curtin University. The study, published in the Journal of Geophysical Research in October, found that the rate of subsidence in Perth increased between 2000 and 2005, at the same time as the Water Corporation of WA increased the amount of water it was drawing from the city’s two main aquifers to meet the demands of a growing population. Will Featherstone, professor of geodesy at Curtin and the lead author of the study, described the effect as “like slowly letting the air out of a balloon”. “If you take the water out of the ground, the overburden of all the rocks above pushes down,” he told Guardian Australia. The city appears to be sinking at a rate of between 2mm and 6mm a year, variable throughout the Perth basin. The greatest change was measured at the seaside suburb of Hillarys, which has a GPS sensor to measure the rate of subsidence and a tidal marker operating side by side. Data for much of the Perth basin is patchy. A sinking city also has ramifications for the measurement of sea levels. A few years ago the rate of sea level rise in Western Australia was reported – not entirely accurately, it turned out – to be three times greater than the global average. Read More here

 

PLEA Network

6 October 2015, The Guardian, Perth’s water worries: how one of the driest cities is fighting climate change, From locating leaky pipes with acoustic listening to reusing wastewater, Western Australia’s capital is using technology to bridge the water gap. Perth, the capital of Western Australia, is not only one of the most isolated cities in the world, it is also becoming one of the driest in Australia. Since the gold rush of the 1890s, impressive engineering schemes have transported enough water to make Perth a city of lush lawns and eye-catching flowerbeds, to the surprise of some visitors. But a drop in average annual rainfall in recent years, along with some truly dire climate change projections, have required government and business to focus on water security. Australia’s Climate Council estimates that water flow from rainfall into Perth’s dams has slumped by 80% since the 1970s, with precipitation in the south-west corner of Australia forecast to drop by up to 40% by the end of the century. Coping with climate change Last year, Perth’s dams received just 72.4bn litres of water – far less than the 300bn currently demanded by Perth’s two million-strong population. A huge desalination facility, completed in 2006, has helped make up this shortfall, but behavioural and technological change is also bridging the gap. Read More here

PLEA Network

27 July 2015, The Conversation, Don’t panic! Traffic congestion is not coming for our cities: There is a new fear on the block. Not just ISIS, home invasions, wind turbines and the budget deficit, but now we must fear … traffic congestion. The Infrastructure Australia report on the future needs of our cities emphasises the growing problem of urban traffic congestion all over the country. It is echoed by the State of Australian Cities report. Congestion, it warns, will overwhelm our futures, making them unlivable, uneconomic and ungovernable as we fight for every piece of road space. But do we have to accept that congestion trends will overwhelm us? Is it really right to fear congestion? The fear: According to the IA report travel times are going to increase by at least 20%. The total cost of such congestion will increase from A$13.7 billion a year to A$53.3 billion by 2031, an increase of nearly three times. The loss of time will apparently cripple us.

 The public policy reaction to fear is to jettison economic analysis and throw money at it. No benefit-cost ratio is needed as we need to act now or it will overwhelm us. Kneejerk reactions like this are usually regretted in hindsight but at the time we have no choice, it must be done. In this climate of congestion-fear big roads are not being assessed, just announced. The congestion peril is coming. We must honour the Abbott government’s election commitments to around A$40 billion of high-capacity roads such as the East-West Link in Melbourne (now discredited and dropped by the Victorian Government), the Connex West system in Sydney (causing similar pain with communities subject to its impact) and most recently the Perth Freight Link (which looms as the biggest election issue facing the Barnett government that never actually wanted it). All of these roads have benefit cost ratios that make them very questionable. Read More here

 

PLEA Network

30 June 2015, 350.org Australia, Aligning Council Money With Council Values A Guide To Ensuring Council Money Isn’t Funding Climate Change. 350.org Australia – with the help of the incredible team at Earth Hour – has pulled together a simple 3-step guide for local governments interested in divestment.  The movement to align council money with council values is constantly growing in Australia. It complements the existing work that councils are doing to shape a safe climate future. It can also help to reshape the funding practices of Australia’s fossil fuel funding banks. The steps are simple. The impact is huge.The guide can also be used by local groups who are interested in supporting their local government to divest as a step-by-step reference point. Access guide here