摘要
5.12汶川大地震不仅造成了惨重的人员伤亡和巨大的经济损失,而且对当地生态环境产生了严重的影响。以多种卫星遥感数据为信息源,运用地理信息系统、遥感和综合分析技术,从地表植被、农田生态系统、河道水体、自然保护区以及消、杀、灭药剂等几个方面,对受灾的汶川等36个县市的生态环境进行了全面评估。评估结果显示:汶川地震灾害核心区预计发生滑坡、泥石流等次生地质灾害的面积为190.86km2,占灾区总土地面积的0.19%;灾区林、草地预计受损164.96km2,占灾区林、草地总面积的0.22%;灾区农田预计毁坏57.77km2,占灾区农田总面积的0.29%,受损农田主要分布在西部山区;灾区发生河道阻塞34处,主要分布在龙门山北段的平武、北川、江油、青川、茂县等山体大量滑坡的县市;卧龙自然保护区大熊猫的主要生活区域,发生滑坡、泥石流等灾害1.44km2,受损林地面积比例为0.28%,给大熊猫的取食造成了严重威胁。
The Wenchuan Earthquake on May 12th not only caused huge death, toll, injuries, and economic losses, but also affected local environment seriously. In this paper, using RS images and GIS, RS and integrated analysis technology, we analyzed the impacts of the devastating earthquake on vegetation, agricultural ecosystem, river, Wolong Natural Reserve, and the use of disinfector in 36 counties of the earthquake region. The results show that the lost land area from landslide or mudslides was about 190.86 km^2, about 0.19% of total land area. The damaged forest and grassland area was about 164.96 km^2, about 0.22% of total forest and grassland area. The farmland area destroyed by landslide or mudslides was estimated to be about 57.77 km^2, about 0.29% of total farmland area. About 34 rivers were blocked in the earthquake region, which are primarily located in Pingwu, Beichuan, Jiangyou, Qingchuan and Moxian counties. The damaged land area in the Wolong Natural Reserve was about 1.44 km^2, about 0.28% of damaged forest area, which poses serious threat to panda＇s life.
出处
《生态学报》
CAS
CSCD
北大核心
2008年第12期5899-5908,共10页
Acta Ecologica Sinica
基金
国家科技支撑计划"生态系统格局与结构变化的遥感监测技术研发"资助项目(2006BAC08B03)~~
关键词
地震灾害
生态环境
评估
遥感
earthquake disaster
ecological environment
assessment
remote sensing
