Dynamic dam safety monitoring index drawing method considering multiple influence factors

The invention relates to a dynamic dam safety monitoring index drawing-up method considering multiple influence factors. The method comprises the following steps: selecting a dam monitoring data sequence; constructing a prediction model of the effect quantity; calculating the residual error of the fitting data sequence obtained by the prediction model and the original data sequence, and calculating to obtain a residual error standard deviation sigma; based on a calculation result of the prediction model, determining a minimum standard deviation multiple n capable of enveloping all credible monitoring data, and calculating to obtain n sigma; determining the multiple m of the nominal parameter and the standard deviation sigma; and comparing the m sigma, the n sigma and the 3 sigma, taking the maximum value as an end point of a normal value interval, and determining a dam safety monitoring index. According to the method, influences of multiple factors such as probability distribution of observation values, preci