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Discussion papers | Copyright
https://doi.org/10.5194/nhess-2018-213
© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 27 Aug 2018

Research article | 27 Aug 2018

Review status
This discussion paper is a preprint. It is a manuscript under review for the journal Natural Hazards and Earth System Sciences (NHESS).

Seismic Indirect Economic Loss Assessment and Recovery Evaluation Using Night-time Light Images – Application for Wenchuan Earthquake

Jianfei Wang1, Jingfa Zhang2, Lixia Gong2, Qiang Li2, and Dan Zhou3 Jianfei Wang et al.
  • 1Institute of Engineering Mechanics (Key Laboratory of Earthquake Engineering and Engineering Vibration), China Earthquake Administration, Harbin 150080, China
  • 2Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China
  • 3Institutes of Science and Development, Chinese Academy of Science, Beijing 100190, China

Abstract. Seismic indirect economic loss not only has a major impact on regional economic recovery policies, but also related to the economic assistance at the national level. Due to the Cross-regional economic activities and the difficulty of obtaining data, it's difficult that the indirect economic loss survey covers all economic activities. However, night-time light in an area can reflect the economic activity of the region. This paper focuses on the indirect economic losses caused by the Wenchuan earthquake in 2008 and evaluated the progress of restoration and reconstruction based on night-time light Images. First, the functional relationship between GDP and night-time light parameters was established based on the pre-earthquake data. Next, the indirect loss of the earthquake was evaluated by the night-time 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, was evaluated. Lastly, the process of light expansion in the disaster area was analyzed to evaluate the economic expansion speed and efficiency.

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Short summary
This paper focused on the indirect economic losses caused by the Wenchuan earthquake in 2008, evaluated the progress of restoration and reconstruction based on night-time light Images. Results show that the GDP has a quadratic function relationship with the total night-time lights under normal conditions, and the economy of the disaster area after the earthquake showed unstable and turbulent development. This research can provide basis for macro-control of earthquake recovery and reconstruction.
This paper focused on the indirect economic losses caused by the Wenchuan earthquake in 2008,...
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