The severity of flood disasters in China ranks first in the world. Frequent flood disasters not only cause huge economic losses, but also have a serious impact on the development of social stability. More than 100 large and medium-sized cities in China are under flood water level, and their safety is seriously threatened.
Therefore, it is necessary to analyze and predict the trend of flood disasters, conduct real-time monitoring of floods in disaster areas, make real-time and rapid assessments of disaster situations, and scientifically formulate flood control and disaster mitigation countermeasures.
To mitigate flood disasters, two factors must be considered: one is to forecast flood events quickly and accurately; the other is to quickly evaluate the location, time, scope and intensity of disasters caused by flood events. The key to rapid and accurate forecasting is to establish correct flood models and obtain relevant information quickly, while disaster assessment is based on the improvement of the Earth observation system.The development of remote sensing technology provides a powerful and efficient means for flood monitoring and disaster loss estimation.
The application of remote sensing technology in flood monitoring and disaster loss estimation includes: the first is to establish a digital elevation model (DEM), which is the basis for the establishment of a flood model;The second is the simulation demonstration of flood evolution, which can directly simulate the development of flood disasters in real time through 3D visualization technology and VR (virtual reality) technology;The third is post-disaster loss assessment, which can be used to assess the affected area, extent and loss by using satellite images combined with GIS vector data and basic databases.
Comment list ( 0 )
