The invention relates to a
groundwater safety assessment method under an
extreme climate event, which comprises the following steps: collecting multi-source heterogeneous data such as meteorological data, geological data, hydrological data and
remote sensing data, and constructing a unified
groundwater safety knowledge graph through standardized cleaning,
semantic alignment and deletion completion; monitoring an
extreme climate event in real time, and updating a node relation weight and sparsifying a transmission path based on
knowledge graph dynamic evolution and a
time sequence attention mechanism; performing risk propagation path reasoning on the dynamic
knowledge graph in combination with an improved graph neural network, identifying key
pollution nodes, and outputting a structured
risk level and a coping suggestion; the
system continuously optimizes atlas and
model parameters based on evolution feedback, and high adaptability and reasoning precision of
emergency response are achieved. According to the method, the intelligence, the real-time performance and the accuracy of underground water
risk assessment are improved. The problems that the underground
water pollution propagation path is difficult to dynamically identify and the decision adaptability is insufficient under
extreme climate events are solved.