Assessment of Buildings and Electrical Facilities Damaged by Flood and Earthquake From Satellite Imagery

Abstract

Abstract. Natural disasters cause considerable losses to people’s lives and property. Satellite images can provide crucial information of the affected areas for the first time, conducive to relieving the people in disaster and reducing the economic loss. However, the traditional satellite image analysis method based on manual processing drains workforce and material resources, which slowed the government’s response to the disaster. Aiming at the natural disasters like floods and earthquakes that often happen in the south of China, we propose a dual-stage damage assessment method based on LEDNet and ResNet. Our method detects the changes between the satellite images captured before and after a disaster of the same area, segments the buildings, and evaluates the damage level of affected buildings. In addition, we calculate influence maps based on the damage scale to the building and estimate the damage situation for electrical facilities. We used images related to earthquakes and floods in the xBD dataset to train the network model. Moreover, qualitative and quantitative evaluations demonstrated that our method has higher accuracy than the xBD baseline.

Post-Disaster Damage and Loss Assessment in the Iranian Healthcare Sector: A qualitative study

“…Economic Damage and losses from disasters have increased in recent decades(8). Disasters impose signi cant human and nancial losses, and impact socio-economic status through casualties, building destruction, and infrastructure damage (9)(10)(11)(12). In addition to the impact on human health, disasters also have a detrimental effect on health-related institutions, reducing their capacity to respond and recover, which in turn leads to an increase in deaths and injuries (13,14).…”