Isra-Mart srl : Climate change could throw rail network off track

www.isra-mart.com

Isra-Mart SRL news:

Scientists reckon Britain's rail network will face increasing risk of disruption as extreme weather events linked to climate change become more common.

According to a new study published late last week in the Quarterly Journal of Engineering Geology and Hydrogeology, the UK's 20,000 kilometres of embankments and cuttings will face an increased liklihood of landslides and floods as a result of the predicted rise in extreme weather events.

A team from the University of Southampton and Network Rail found that incidents leading to rail delays of more than eight hours were far higher during the wet winter of 2000-2001 when storms caused widespread travel disruption.

More recently, a landslide in June forced a train derailment on Scotland's West coast and injured eight people, while last November a Dorset railway line was blocked by around 40 tonnes of falling rock.

The researchers warned that "travel chaos" would ensue if, as many scientists predict, climate change increases the frequency of such incidents.

London's long-suffering commuters will perhaps not be surprised that the South East is expected to feel the worst effects as much of the network is built on soft London clay.

Lead author Fleur Loveridge said that roads and the London Underground would also be affected, but argued that railways faced a "unique problem" in the form of cuttings and embankments.

"Railways were built before we understood soil mechanics [so] they're very susceptible to changing climate," she said. "Wet winters cause failures that can result in landslides … and hot dry summers can cause subsidence which can also be significant."

Network Rail has admitted that over half of its cuttings and embankments are in a poor condition and susceptible to weather events, which partly explains the £14bn of funding it was granted in last week's Comprehensive Spending Review to support rail maintenance and investment.

Loveridge said more proactive planning was needed and mitigation measures should be put in place now, arguing that such moves would prove more cost effective than clearing up after extreme weather incidents.

"The key word is adaptation," Loveridge said. "We need to raise awareness and increase maintenance budgets, as well as supporting research to develop innovative engineering solutions to tackle the problems before they happen."