The invention discloses a flood
disaster monitoring and
early warning system and a flood
disaster monitoring and early warning method. A cloud, rain, water and I integrated sensing network is constructed through a full-chain monitoring capability; a
hybrid prediction model coupled with HEC-HMS and SWMM physical models and an LSTM-
Transformer deep learning architecture is established, parameter deviation is dynamically corrected through NSGA-II and a symbolic regression multi-objective optimization
algorithm, the flood prediction period is prolonged to 10 days (the precision of the southern
watershed is larger than or equal to 90%, and the precision of the northern
watershed is larger than or equal to 70%), the flood peak
time error is compressed to be within 30 minutes, and compared with a scheme based on a static flood
risk model, the method has the
advantage that the flood prediction efficiency is greatly improved. The
false alarm rate is reduced from 20% to 5% through the dynamic threshold calibration technology; hierarchical response and
survivability communication are adopted, Beidou
satellite and NB-IoT dual-channel redundant transmission is deployed, and a Mesh ad hoc network and
frequency modulation subcarrier technology are combined, so that the direct rate of early warning information in
extreme weather is ensured to be greater than or equal to 99%; and three-dimensional GIS platform dynamic rendering is supported, and collaborative
visualization of a submerging thermodynamic diagram, a material scheduling path and ecological flow monitoring is realized.