摘要
自然灾害往往造成灾区光源载体的破坏,同时伴随着恢复重建过程光源载体又得到修复或新建,因此夜间灯光变化在一定程度上能够反映重大自然灾害对灾区社会经济的影响。基于DMSP-OLS夜间灯光遥感数据,分析汶川地震极重灾区夜间灯光分布范围和强度的年际变化特点,并与地区生产总值和全社会固定资产投资年际变化进行对比分析,探索分析夜间灯光变化与灾害损失的相关关系。研究结果表明,2003-2013年汶川地震极重灾区的夜间灯光分布强度年际变化与地区生产总值和全社会固定资产投资年际变化存在相关关系,基本呈现出灾害当年的夜间灯光遥感影像亮值像元个数和亮值像元数值少于前1年,灾后第1年继续减少,灾后第2年急剧增加并达到峰值;同时,灾后夜间灯光遥感影像亮值像元个数和亮值像元数值的减少与因灾死亡和失踪人口、万人死亡失踪率和万人倒塌房屋率等灾情指标存在较显著的相关关系。
Because natural disasters often cause serious damage to the lights source carriers in disaster affected area,and then the lights source carriers will be repaired or newly built along with the restoration and reconstruction process. Therefore,the nighttime lights changes can reflect the impact of major natural disasters on the socio-economic. Based on DMSP-OLS nighttime lights data,analysis the inter-annual variation characteristics of nighttime lights distribution area and intensity in the most affected area of Wenchuan earthquake,and compare with the interannual variation of regional GDP and total investment in fixed assets,and also explore the correlation between nighttime lights changes and disaster losses. The research shows that the inter-annual variability of the nighttime lights distribution area and intensity are positively correlated with the annual changes of regional GDP and total investment in fixed assets in the most affected area of Wenchuan earthquake from 2003 to 2013,and the result also showing that the Sum of Nighttime Lights（SNL） and the Sum of Nighttime Lights Value（SNLV） in the disaster year are lower than those in the previous year,and continue to decrease in the first year after the disaster,and then the SNL and SNLV increase sharply and peaked in the second year after the disaster; At the same time,the reduction of SNL and SNLV have a significant correlation with the disaster indicators such as death and missing population,mortality and missing rate,and collapse rate of houses.
出处
《灾害学》
CSCD
北大核心
2018年第1期12-18,22,共8页
Journal of Catastrophology
基金
国家质检公益性行业科研专项项目(201510211)
国家自然科学基金项目(913241027)
