Flood risk assessment method and system based on multi-source remote sensing and GIS fusion

Abstract

The present application relates to the technical field of flood risk assessment, and particularly relates to a flood risk assessment method and system based on multi-source remote sensing and GIS fusion, which obtains multi-source remote sensing data and geographic information system data of a target region, inverses surface state parameters and extracts topographic and hydrological structure parameters, performs spatio-temporal correlation fusion by establishing a coupling relationship reflecting the physical processes of surface runoff generation and confluence transmission after unifying the spatio-temporal resolution, generates a fusion characteristic field, dynamically determines the action weight according to the contribution difference of elements to the flood disaster-causing process in combination with the physical transmission chain of rainfall runoff generation, slope confluence and river evolution, obtains the risk distribution through combined calculation, traces the topographic connectivity and water flow path, generates an assessment result containing risk levels and propagation mechanisms, identifies the spatial transmission direction and influence range of the risk distribution, effectively improves the accuracy and reliability of the flood risk assessment, and provides a scientific basis for disaster prevention and mitigation.

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