[Objective] Taking Wangjiang County

Anqing City of Anhui Province as the research area

this study designed twenty year flood disaster in order to provide a scientific basis for the application of remote sensing and geographic information system (GIS) in disaster analysis.[Methods] Using remote sensing and GIS technology

land use was supervised and classified based on remote sensing and DEM data base. The submerged area was calculated by seed spread algorithm

calculation

and the proportion of each type of land use in the submerged area was obtained. A flood disaster assessment model was established

and the flood disaster in 20 years was simulated and analyzed by analogy method.[Results] With the influence of the flood disaster in Wangjiang County in 20 years

the affected area was more than 50% of the total area

and the affected population was more than 90%. Using submerged data combined with cases data

the case could be characterized as large flood disaster. By analogy with typhoon "Pearl" with similar evaluation coefficients

disaster relief and rescue measures were designed with test data.[Conclusion] The combination of remote sensing and GIS technology provides a platform for flood design. By using submerge data

the disaster level can be evaluated as soon as possible. Through analogy analysis with the same level of disaster and combining with the actual situation

the disaster relief measures can be drawn up quickly and accurately

and the case can be assessed as a case for reverence.