Development of community-based landslide early warning system in the earthquake-affected areas of Nepal Himalaya

• 来源期刊: 山地科学学报（英文版）
• 年，卷（期）: 2019,（12）
• 页码范围: 2701-2713
• 页数: 13页
• 语种: 英文

摘要

In the central Nepal Himalaya,landslides form the major natural hazards annually resulting in many casualties and damage.Structural as well as non-structural measures are in place to minimize the risk of landslide hazard.To reduce the landslide risk,a Landslide Early Warning System (LEWS) as a non-structural measure has been piloted at Sundrawati village (Kalinchowk rural municipality,Dolakha district) to identify its effectiveness.Intensive discussions with stakeholders,aided by landslide susceptibility map,resulted in a better understanding of surface dynamics and the relationship between rainfall and surface movement.This led to the development of a LEWS comprised of extensometers,soil moisture sensors,rain gauge stations,and solar panels as an energy source that blows siren receiving signals via a micro-controller and interfacing circuit.The data generated through the system is transmitted via a Global System for Mobile Communications (GSM) network to responsible organizations in realtime to circulate the warning to local residents.This LEWS is user-friendly and can be easily operated by a community.The successful pilot early warning system has saved 495 people from 117 households in August 2018.However,landslide monitoring and dissemination of warning information remains a complex process where technical and communications skill should work closely together.