Economic resilience and recovery efficiency in the severely affected area of Ms 8.0 Wenchuan earthquake
Received date: 2018-07-24
Request revised date: 2019-06-20
Online published: 2019-10-29
Supported by
National Natural Science Foundation of China(No.41501139)
National Natural Science Foundation of China(No.41630644)
Strategic Priority Research Program of Chinese Academy of Sciences(No.XDA20020301)
Copyright
It is of great significance to enhance disaster prevention and response capacity to reveal the post-disaster economic development and recovery process, and to formulate the control policies and recovery methods for post-disaster economic reconstruction according to the economic resilience. Based on the long-term socio-economic data and ARIMA model, this paper calculated the economic resilience index of severely affected area of Wenchuan earthquake, and adopted the improved Variable Return to Scale (VRS) DEA model and Malmquist productivity index to analyze the efficiency and effect of annual post-disaster recovery. The results show that: (1) The economic resilience index of earthquake severely affected area is 0.877. The earthquake caused a short-term economic recession in the affected areas, but the economy returned to its pre-quake state within two years. In addition, the industrial economy is less resilient than agriculture and service industries. (2) The comprehensive economic recovery efficiency of the disaster-stricken area in the year after the disaster is 0.603. The comprehensive efficiency, pure technical efficiency and scale efficiency of the plain hilly area are significantly higher than those of the plateau mountain area. (3) The annual fluctuation of total factor productivity after the disaster was strong, and the economic recovery efficiency declined significantly, resulting in a short-term economic recession. The TFP index returned to steady state after a decline of 33.7% and 15.2% in the two years after the disaster. (4) The significant decline in the post-disaster recovery efficiency is mainly caused by technological changes, and the renewal of production system is the leading factor in determining the economic resilience after the disaster. With the decline in the scale of economic recovery, the long-term economic recovery in the study areas mainly depends on pure technical efficiency, and the improvement of pure technical efficiency is the driving force to maintain the long-term growth of post-disaster economy. Therefore, in view of the differences between the reconstruction of natural conditions and the stage of economic development, the disaster-stricken areas need to change and readjust their economic structures actively. Meanwhile, we should pay attention to updating production system to enhance the level of technological progress, and give full play to the scale effect of large-scale capital, facilities, manpower and other factors investment, so as to enhance the response to the disaster impact of economic resilience and recovery efficiency.
ZHOU Kan , LIU Baoyin , FAN Jie . Economic resilience and recovery efficiency in the severely affected area of Ms 8.0 Wenchuan earthquake[J]. Acta Geographica Sinica, 2019 , 74(10) : 2078 -2091 . DOI: 10.11821/dlxb201910009
表1 2008年汶川地震极重灾区县经济恢复相对效率及分解结果Tab. 1 Economic recovery relative efficiency and decomposition results in 2008 |
| 地区 | 综合效率 | 纯技术效率 | 规模效率 | 规模收益 |
|---|---|---|---|---|
| 汶川县 | 0.505 | 1.000 | 0.505 | 递增 |
| 北川羌族自治县 | 0.293 | 1.000 | 0.293 | 递增 |
| 绵竹市 | 1.000 | 1.000 | 1.000 | 不变 |
| 什邡市 | 1.000 | 1.000 | 1.000 | 不变 |
| 青川县 | 0.321 | 1.000 | 0.321 | 递增 |
| 茂县 | 0.269 | 1.000 | 0.269 | 递增 |
| 都江堰市 | 0.912 | 0.939 | 0.971 | 递减 |
| 平武县 | 0.299 | 0.580 | 0.515 | 递增 |
| 彭州市 | 0.637 | 1.000 | 0.637 | 递减 |
| 安县 | 0.798 | 0.981 | 0.813 | 递增 |
| 平均值 | 0.603 | 0.950 | 0.632 | — |
表2 2007-2015年汶川地震极重灾区Malmquist指数及分解结果Tab. 2 Malmquist index and its decomposition results in 2007-2015 |
| 年份 | 综合效率 | 技术变动率 | 纯技术效率 | 规模效率 | 全要素增长率 |
|---|---|---|---|---|---|
| 2007年 | 0.924 | 1.131 | 0.974 | 0.948 | 1.044 |
| 2008年 | 1.027 | 0.646 | 1.053 | 0.975 | 0.663 |
| 2009年 | 0.957 | 0.886 | 0.854 | 1.121 | 0.848 |
| 2010年 | 1.011 | 1.030 | 0.988 | 1.023 | 1.041 |
| 2011年 | 0.930 | 1.092 | 1.012 | 0.919 | 1.015 |
| 2012年 | 0.993 | 1.039 | 1.060 | 0.937 | 1.032 |
| 2013年 | 1.019 | 1.011 | 1.069 | 0.953 | 1.030 |
| 2014年 | 1.037 | 0.999 | 1.029 | 1.007 | 1.036 |
| 2015年 | 1.037 | 0.977 | 0.991 | 1.047 | 1.014 |
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