【摘要】 以2008年初广西东北部遭受的持续性大范围特大冰雪灾害为例,基于EOS/MODIS数据,构建改进的归一化差分冰雪指数模型(MNDSI),综合应用监督分类方法,对受灾林区进行遥感监测与灾情分级评估技术研究,为及时应对此类灾害性气候事件和防灾减灾提供科学依据。更多还原

【Abstract】 With global climate change,extreme weather and climate events such as snow and ice disasters could occur from time to time in the southern China,however techniques for monitoring and evaluating the disasters are missing.In this paper,by using a case study of a continuous and wide range of snow-disaster in the north-eastern part of Guangxi suffered in early 2008,a modified normalized difference snow index(MNDSI)model was constructed based on EOS/MODIS data.Integrated monitoring and classifying methods were then developed in remote sensing monitoring and classification evaluation of the suffered forest area.The techniques would provide a scientific basis for timely response to the disasters,and for disaster prevention and mitigation of such extreme climate events.更多还原