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Assessment of spatio-temporal variations in vegetation recovery after the Wenchuan earthquake using Landsat data

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Listed:
  • Quanjun Jiao
  • Bing Zhang
  • Liangyun Liu
  • Zhenwang Li
  • Yuemin Yue
  • Yong Hu

Abstract

The 8.0-magnitude Wenchuan earthquake in 2008 damaged the ecology of northwestern Sichuan, China. This study assessed ecological changes within a few years of the earthquake through satellite observations of vegetation dynamics in the earthquake area. As an ecological indicator, the fractional vegetation cover was extracted using the Normalized Difference Vegetation Index based on multi-year Landsat images and was validated using airborne images. We found that the entire mountainous disaster area had recovered by 68.45 % 3 years after the 2008 earthquake. After rapid recovery of vegetation in 2009, the recovery process slowed. The vegetation recovery rate (VRR) in the area heavily damaged by landslides was slightly lower but nearly that of the entire disaster area. In addition, because of differences in the proportions of soil and rock in the damaged areas, recovery of vegetation in the southwest portion of the study area was slower than in the northeast areas. Topographic analysis of vegetation recovery patterns indicated that damage to vegetation was closely related to slope, while recovery of vegetation was more sensitive to elevation. The landscape analysis showed that the recovery rate (65.21 %) of the excellent vegetation cover type was slower than the overall VRR. This study suggests that vegetation recovery is a slow ecological process and that ecological restoration should be implemented in mountainous regions affected by the earthquake. Copyright Springer Science+Business Media Dordrecht 2014

Suggested Citation

  • Quanjun Jiao & Bing Zhang & Liangyun Liu & Zhenwang Li & Yuemin Yue & Yong Hu, 2014. "Assessment of spatio-temporal variations in vegetation recovery after the Wenchuan earthquake using Landsat data," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 70(2), pages 1309-1326, January.
    • Handle: RePEc:spr:nathaz:v:70:y:2014:i:2:p:1309-1326
    DOI: 10.1007/s11069-013-0875-8
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    References listed on IDEAS

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    1. Wen-Tzu Lin & Wen-Chieh Chou & Chao-Yuan Lin, 2008. "Earthquake-induced landslide hazard and vegetation recovery assessment using remotely sensed data and a neural network-based classifier: a case study in central Taiwan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 47(3), pages 331-347, December.
    2. Yang Liu & Ronggao Liu & Quansheng Ge, 2010. "Evaluating the vegetation destruction and recovery of Wenchuan earthquake using MODIS data," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 54(3), pages 851-862, September.
    3. Chao-Yuan Lin & Chin-Wei Chuang & Wen-Tzu Lin & Wen-Chieh Chou, 2010. "Vegetation recovery and landscape change assessment at Chiufenershan landslide area caused by Chichi earthquake in central Taiwan," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 53(1), pages 175-194, April.
    4. Jiuping Xu & Yi Lu, 2012. "Meta-synthesis pattern of post-disaster recovery and reconstruction: based on actual investigation on 2008 Wenchuan earthquake," Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, Springer;International Society for the Prevention and Mitigation of Natural Hazards, vol. 60(2), pages 199-222, January.
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    1. Jingzhong Li & Xiao Xie & Bingyu Zhao & Xiao Xiao & Bing Xue, 2022. "Spatio-Temporal Processes and Characteristics of Vegetation Recovery in the Earthquake Area: A Case Study of Wenchuan, China," Land, MDPI, vol. 11(4), pages 1-17, March.

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