Risk Assessment of People Trapped in Earthquakes Based on Km Grid: A Case Study in Zhaotong City, Yunnan, China

Risk assessment of the trapped personnel location is the important basis for earthquake disaster risk preparation and emergency search and rescue in an earthquake.Using a constructed assessment model, we assessed the risk of people trapped in the collapsed buildings caused by an earthquake in Zhaotong city, Yunnan province, based on km grid data.Results showed that, the highest risk areas of trapped personnel distribution were mainly located in Zhaoyang district, Zhenxiong county and Weixin county.The higher the occupancy population density and the area of collapsed buildings are, the higher the risk level of people trapped.The grid-based assessment of people trapped in earthquakes, can meet the requirements of key search and rescue zone identification and rescue forces allocation in the early stage of earthquake emergency.In future, as the abundant and improvement of basic data, it is possible to provide more information and suggestions for earthquake disaster risk preparation and emergency search and rescue by using gridbased risk assessment of trapped people in earthquakes.