四湖地区暴雨后涝渍害遥感空间分析  

Waterlogging Disaster Spatial Analysis Inversed by Remote Sensing after Rainstorm in Sihu Region

作　　者：熊勤学[1,2] 

机构地区：[1]农业部资源遥感与数字农业重点开放实验室,北京100081 [2]长江大学农学院,湖北荆州434025

出　　处：《湖北农业科学》2011年第10期1980-1983,共4页Hubei Agricultural Sciences

基　　金：2010年农业部资源遥感与数字农业重点开放实验室开放基金项目(RDA1011)

摘　　要：通过分析降雨前后ENVISAT ASAR IMM_1P数据,总结出运用ENVISAT ASAR IMM_1P数据反演四湖地区涝渍害的指标,即涝害的反演指标为降水前后向散射系数介于0.12～0.25且降水前后向散射系数大于降水后后向散射系数,渍害的反演指标为降水前后向散射系数介于0.12～0.25且降水后的后向散射系数较降水前的后向散射系数高0.30。并运用指标计算出2010年7月8~11日暴雨过后四湖地区涝渍害空间分布,通过利用高分辨率HJ-1-A-CCD1数据对局部地区分析比较表明反演指标能真实反映涝渍害现状。On the analysis of ENVISAT ASAR IMM_1P data of the pre and post rainstorm,the waterlogging disaster reversion indexes of Sihu region were summarized,The detail index of flood injury was that the backscattering coefficient value at pre and post rainstorm was changed within the range of 0.12～0.25,and the backscattering coefficient value at pre-rainstorm was higher than post-rainstorm;while the detail index of waterlogging was that the backscattering coefficient value at pre and post rainstorm was changed within the range of 0.12～0.25,the value difference of the backscattering coefficient at post rainstorm must be 0.30 higher than the pre.The spatial distribution of waterlogging disaster after rainstorm（from July 7,2010 to July 11,2010） in Sihu region was analyzed using these indexes,then compared with high resolution HJ-1-A-CCD1 data,which showed that these reversion indexes were feasible in reflecting the situation of waterlogging disaster.

关 键 词：ENVISAT ASAR IMM_1P数据 涝渍害 遥感反演 

分 类 号：S127[农业科学—农业基础科学]