Method of determining the highest theoretical wave height and the accumulated frequency wave height in ancient times

Abstract

The invention provides a method of determining the highest theoretical wave height and the accumulated frequency wave height in ancient times, and relates to the paleoclimate recovery field. According to the embodiment, the method of determining the highest theoretical wave height includes the steps of performing decompaction correction on the observation thickness of an obtained target longshore bar and obtaining an accurate thickness value, calculating the breaker water depth on the basis of an initial thickness, and finally calculating the highest theoretical wave height on the basis of the breaker wave height since the breaker wave height is similar to the highest theoretical wave height, that is to say, the highest theoretical wave height can be derived though only the observation thickness is obtained.

Description

technical field [0001] The invention relates to the field of paleoclimate restoration, in particular to a method for determining the maximum theoretical wave height and cumulative frequency wave height in ancient water basins. Background technique [0002] Paleoclimate recovery helps to study the periodic changes in meteorology, astronomy or other fields, and then can predict the current and future meteorology and astronomy. [0003] The ancient wave condition (hereinafter referred to as the ancient wave condition) can intuitively reflect the changing law of sea (lake) waves in the specified period in ancient times, which plays an important role in promoting the research in the fields related to paleoclimate change. [0004] There are many parameters to describe the ancient wave state, one of which is the ancient wave height, and the restoration of the ancient wave height is an important part of the ancient wave state restoration. [0005] According to research, there are m...

AI Technical Summary

Problems solved by technology

[0006] However, the restoration of the ancient wave height by the corrugation method has the following disadvantages: the restoration of the ancient wave height by the corrugation method needs to count the corrugation elements preserved in the geological records, such as wave height, wavelength, etc., as well as the grain size and density of the sediments that make up the corrugation.

[0007] Disadvantages of gravel beach gravel particle size method for recovering ancient wave height: (1) The sediment near the shoreline is not only affected by the original wind wave, but also by the surf backflow and reflected wave, so the critical wave condition calculated from this is not (2) The gravel beach near the shoreline is largely controlled by provenance, that is, the size of gravel largely depends on the weathering and transport process in the provenance area, Rather than depending on wave conditions; (3) The sediments near the shoreline are often subject to denudation, resulting in incomplete sedimentary records, so that it is impossible to obtain the continuous change process of ancient wave height in time

[0008] In summary, the current method of recovering the ancient wave height is either impossible to implement due to high cost, or the restored ancient wave height is not accurate enough because of the inability to eliminate the influence of other effects

Images