STGCN-based flood forecast error real-time correction method and system

The invention discloses an STGCN-based flood forecast error real-time correction method and system. The method comprises the steps of constructing a forecast error real-time correction data set; preprocessing the forecast error real-time correction data set, extracting the flowing length from a related rainfall station to a forecast section in forecast model input data, and constructing a spatial adjacency matrix; constructing a space-time diagram convolutional network model STGCN, extracting the time sequence and local space features of the error sequence, and constructing a mapping function reflecting the nonlinear relationship of the error sequence; performing parameter optimization by adopting an improved grey wolf optimization algorithm, and constructing an optimal AGWOSTGCN model; the prediction model M is used for predicting real-time data, the real-time error correction model AGWOSTGCN is used for predicting model prediction errors, and a final prediction value is obtained. The method has better predi