Guideline On Integrating Climate Change Projection Into Landslide Risk Assessments and Mapping – At The River Basin Level
Landslides are a geological process common across ASEAN Member States (AMS). They are often triggered by earthquakes, unstable geological conditions, and/or rainfall. Human development activities on fragile slopes are also responsible for landslides. Landslide numbers are on the rise mainly due to increasing rainfall intensity. Landslides can co-occur at the same time as floods during, or in the aftermath, of heavy or prolonged rainfall events. Seven out of ten ASEAN Member States (excepting Brunei, Cambodia, and Singapore) were affected by flood and landslides during the 2015-2016 El Nino, with impact and severity highest in Indonesia, Myanmar, and Vietnam. Increasing widespread landslide incidences are a new challenge to AMS, as in 2018 when the majority of Lao PDR, as well as Myanmar, experienced heavy flooding and landslides that exceeded country response capacity. Another example is the devastating floods and landslides in June-August 2015 in Myanmar. Many parts of the country, and in particular its mountainous regions such as Chin State, were affected by devastating landslides, cyclones and floods. These calamities significantly damaged lives and property, especially in the Chin State capital of Hakha.