Storm surge dam overtopping risk early-warning method based on wind field effect of typhoon processes

The invention relates to a storm surge dam overtopping risk early-warning method based on the wind field effect of typhoon processes. The method includes the following steps of 1, establishing a refined storm surge-astronomical tide-coastal wave coupling dam overtopping value forecasting model, and outputting the water level and the wave height of a coastal area; 2, according to the data of a seawall and historical typical typhoons, analyzing to obtain the influence coefficients of different types of seawalls on storm surge dam overtopping; 3, according to the water level and the wave height,which are obtained in step 1, of the coastal area and the influence coefficients, obtained in step 2, of different types of the seawalls on storm surge dam overtopping, obtaining the dam overtopping risk rank of each seawall. Compared with the prior art, the method has the advantages that different types of the seawalls, microtopography and other influence factors on a sea level in the single-typhoon process and under oth