Landslides '10 times deadlier' than other global hazards
Washington: Landslides kill ten times more people across the world as compared to any other disaster, a new study has revealed.
A new database of hazards collected by Durham University, UK shows that 32,300 people died in landslides between 2004 and 2010.
Previous estimates ranged from 3,000 to 7,000 fatalities.
The database, which provides the first detailed analysis of fatal landslides across the world, maps hotspots including China, Central and South America, and India.
The researchers said that the new database, the Durham Fatal Landslide Database (DFLD), can help policymakers to prioritise areas for action to manage hazards and to lessen the risks to human populations living in hotspot regions.
Lead researcher, Professor David Petley, a Geographer at the International Landslide Centre, and Co-Director of The Institute of Hazard, Risk and Resilience, Durham University, said: “The environmental effects of landslides are often devastating for nearby human populations.
“We need to recognise the extent of the problem and take steps to manage what is a major environmental risk to people across the world.
“Our database will enable us to do this by identifying areas most at risk and could help to save thousands of lives,” he said.
The DFLD includes only fatal landslides and is compiled using a number of search tools and analysis of government statistics, aid agency reports, and research papers.
The researchers say that weather patterns, deforestation, melting permafrost in high mountainous areas, and high and increasing human population densities are important factors in the cause, distribution, number, extent and effects of landslides.
More fatal landslide events are recorded in May to October and the dominant global trigger is rain from the monsoon.
Tropical cyclones also generate extreme rainfall events that trigger landslides in Asia, and hurricanes have the same effect on regions in the Caribbean and Central America.
Professor Petley said: “Areas with a combination of high relief, intense rainfall, and a high population density are most likely to experience high numbers of fatal landslides. Landslides are a global hazard requiring a major change in perception and policy.
“There are things that we can do to manage and mitigate landslide risks such as controlling land use, proactive forest management, and guiding development away from vulnerable areas.”
The global landslide hotspots are:
Southern edge of the Himalayan Arc
South west coast of India
Southern and eastern coasts of China
Central China, notably the mountains around the Sichuan Basin
Western edge of the Philippine Sea plate (Japan, Taiwan and the Philippines)
Central Caribbean islands including Haiti
Indonesia, especially in Java
Along the mountainous chain from Mexico, Central America, to Chile, South America, but especially in Colombia.
The findings have been published in the journal Geology.