Abstract
Abstract. Indirect seismic economic loss not only impacts regional economic recovery
policies but is also related to economic assistance at the national level.
Due to cross-regional economic activities and the difficulty of obtaining
data, it is difficult for the indirect economic loss survey to cover all
economic activities. However, nighttime light in an area can reflect the
economic activity of the region. This article focuses on the indirect
economic losses caused by the 2008 Wenchuan earthquake and evaluation of the
progress of restoration and reconstruction based on nighttime light images.
First, the functional relationship between GDP and nighttime light
parameters is established based on pre-earthquake data. Next, the
indirect loss of the earthquake is evaluated by the nighttime light
attenuation in the disaster area after the earthquake. Then, the capacity
recovery, which is characterized by the brightness recovery process of the
light area, is evaluated. Lastly, the process of light expansion in the
disaster area is analyzed to evaluate the speed and efficiency of economic expansion.
Subject
General Earth and Planetary Sciences
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