Application of multi-source remote sensing data in flood disaster analysis
Flood disasters pose a serious threat to the safety of people's lives and properties.How to confirm the flood disaster-affected areas quickly is very significant for the work of disaster analysis.In this paper,Zhuozhou City,one of the areas heavily affected by the"July 23"catastrophic flood in the Haihe River Basin,was studied.This paper used the synthetic aperture radar(SAR)to extract temporal water information during the disaster period and analyzed the spatio-temporal evolution of the water area and flood inundation scope during the flood evolution process.Through temporal optical image comparison and field investigation,the paper then determined the flood-affected scope,location,and area,as well as the main types of the affected surface features.The research results show that unlike traditional optical satellite remote sensing,multi-source satellite remote sensing combined with SAR breaks through the influence of clouds and rain.It significantly improves the timeliness of remote sensing applications and can perform spatio-temporal change analysis of surface water coverage during the disaster process.By combining with geographic information system(GIS)spatial analysis,it can provide technical support for the work of disaster emergency rescue and disaster loss assessment.
multi-source remote sensingflood disastersynthetic aperture radar(SAR)flood inundation scopegeographic information system spatial analysisdisaster loss assessment
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