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

Abstract

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.

Description

technical field [0001] The invention relates to the technical field of paleoenvironment reconstruction, in particular to a paleowind force measurement method and device based on a method for quantifying the thickness of coastal sandbars. Background technique [0002] Paleowind force is an important index in paleoclimate research. Since paleoclimate is an important part of paleoenvironment, paleoclimate research is of great significance to paleoenvironmental reconstruction, and paleoenvironmental reconstruction is helpful for understanding the sedimentary background of sedimentary basins and guiding petroleum development. Exploration plays an important role. Therefore, it is very necessary to accurately obtain the paleowind force, and it is also an important part of the paleoclimate reconstruction process, which is an unavoidable problem. [0003] The method for quantitatively determining paleowind force in the prior art is: by analyzing the size distribution characteristics ...

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Problems solved by technology

[0004] However, since the size distribution characteristics of sediments near the lake shoreline are not only affected by the original wind and waves, but also by the surf return and reflected waves, the critical wave condition obtained based on the size distribution characteristics of the sediments near the shoreline cannot It truly reflects the original ancient wind and wave conditions; secondly, the gravel beach near the lake shoreline is largely controlled by provenanc...

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