Guest Post: Reversal of sea level rise co-ordinated planning increasing risk to Australian coastal development

Sea level rise is perhaps one of the greatest perils of climate change over the long term according to Dr Peter Ward. The rate of rise will start relatively small and accelerate over this century and the following ones. The latest IPCC report projects sea level rise at 28-98 centimeters by the year 2100, and while this is more than the previous report, there is considerable doubt that this may be still unduly conservative. We simply do not know and understand the complexities of ice sheet disintegration - a non-linear process.

A survey of scientists researching in the sea level field - Expert assessment of sea-level rise by AD 2100 and AD 2300 - found that sea level rise is likely to be 70-120 centimeters by 2100 if greenhouse-gas emissions are not mitigated. A few like James Hansen think that it could be substantially higher.


The Postdam Institute for Climate Impact Research said in a media release:

The experts were also asked for a “high-end” estimate below which they expect sea-level to stay with 95 percent certainty until the year 2100. This high-end value is relevant for coastal planning. For unmitigated emissions, half of the experts (51%) gave 1.5 meters or more and a quarter (27%) 2 meters or more. The high-end value in the year 2300 was given as 4.0 meters or higher by the majority of experts (58%).

And yet here in Australia we see the Federal Government dropping the ball in co-ordinating coastal planning, and State Governments also withdrawing, leaving planning up to local Government which largely lacks the resources and cannot afford to carry the risk of inappropriate planning and development on our coasts. Queensland is just the latest Government to absolve itself of this planning responsibility.

Planners need to allow for Coastal wetlands migration due to sea level rise, climate change

Coastal Wetlands are under pressure. They face rising seas from climate change, but their biggest obstacle to migrate naturally inland is human development with roads, houses and other infrastructure blocking their way. And our urban planners are largely unaware of this tricky situation.

We all love to live beside the sea, but coastal urban development and rising seas will increasingly threaten sensitive coastal wetlands with no room to move and imperilling the survival of their unique plants, birds and fish.

Our urban planners have taken a stable sea level for granted with development to date, often destroying wetland environments for coastal development, agriculture and aquaculture.

More recent urban planning incorporating sea level rise predictions places an emphasis on the threat to peoples houses, roads, railway embankments and other human infrastructure. But planning also needs to encompass the coastal wetland environments that share our coastlines. These ecosystems will also need to migrate inland as the ocean rises.

See also: Mangrove Alliance | Mangrove Action Project | Mangrove Watch Australia | Coastal ecosystems suffer 100 fold decrease in capacity to store carbon mitigating climate change

More than enough wind energy to power our world, coal power is so last century

A new scientific study has found there is wind energy in abundance to power the needs of the world with near zero emission electric power several times over. The world currently utilizes about 18TW (TeraWatts) of power. The study identified that the lower geophysical limits for energy harvested from surface turbines (supported on towers on land and sea) was over 400TW. If turbines could be flown by kites to capture the more reliable high altitude winds, more than 1,800TW of power could potentially be extracted throughout the atmosphere.

Future wind power development in Victoria stifled by draconian planning regulations

The Baillieu Government in Victoria has put in place draconian planning regulations for new wind farms which will stifle rural development and slow shift to clean energy according to Friends of the Earth. These regulations include residents within a 2km distance of a planned wind turbine able to veto the development, and no development within 5km of any town, plus numerous No Go Zones.

In late November the changes to planning regulations were ridiculed by Ditlev Engel, chief executive of Danish company Vestas which builds and operates commercial wind farms in Australia and around the world.