Method and device for measuring ancient wind power on basis of process for quantifying thicknesses of longshore sand bars

The invention provides a method and a device for measuring ancient wind power on the basis of a process for quantifying the thicknesses of longshore sand bars. The method includes determining the depths of breaker water on crests of the longshore sand bars according to preliminarily acquired slope of bases of the longshore sand bars and the preliminarily acquired original thicknesses of the longshore sand bars; determining the heights of breaker waves according to the depths of the breaker water and known Goda curves; determining the heights of effective waves in deepwater areas according to the heights of the breaker waves and known statistical characteristics of waves; computing wind pressure coefficients according to ancient wind paths and the heights of the effective waves in the deepwater areas by the aid of wave forecast formulas for water in limited wind districts; determining the speeds of the ancient wind power according to the wind pressure coefficients and known relational expressions of the wind pressure coefficients and wind speeds. The method and the device have the advantages that the ancient wind power can be determined according to the thicknesses of the longshore sand bars and accordingly can be accurately quantitatively restored.