Method for judging relation between power loss of wind space wave energy and sand content distribution of silt coast

Abstract

The invention discloses a method for judging a relation between power loss of wind space wave energy and sand content distribution of a silt coast. The method comprises the following steps of: (1) obtaining a corresponding relational expression formula Eta(aPw / ax)=(1-Rho / Rhos)ghSomega between the linear loss of the wave energy power and the silt suspension power spatial and temporal distribution under the condition of the silt coast, wherein Pw indicates the wave energy power in unit width, Eta indicates an efficient factor of the conversion of the linear loss of the wave energy power, Rhos and Rho respectively indicate sand grain density and water density, S indicates an average sand content along vertical direction, omega indicates silt settling speed, h indicates water depth, aPw / ax indicates the linear loss of the wave energy power and (1-Rho / Rhos)ghSomega indicates the power required by maintenance for water silt suspension; (2) converting the relational expression formula in the step (1) to obtain Eta=S(1-Rho / Rhos)ghomega / aPw / ax, and obtaining Eta through practical measuring data; and (3) obtaining the average sand content of the water body: S=EtaaPw / ax / (1-Rho / Rhos)ghomega. According to the method provided by the invention, the change process of the sand content of the water body under the storm condition of the silt coast is accurately forecast.

Description

technical field [0001] The invention relates to the technical field of numerical simulation and forecasting of offshore wave fields, in particular to a method for judging the relationship between wind-sky wave energy power loss and sand concentration distribution on muddy coasts. Background technique [0002] my country has a long muddy coastline. With the continuous improvement of observation and test methods and the continuous accumulation of theoretical research results, people have gradually deepened their understanding of the mechanism of sediment movement on muddy coasts. It has become a reasonable planning protection, It is a powerful means and an important basis for utilizing and developing muddy coast schemes. Therefore, it is very meaningful to study and analyze the relationship between current, wave conditions and sediment concentration in the water body to effectively predict the change of shore and beach. [0003] With the gradual increase in the accuracy of s...

AI Technical Summary

Problems solved by technology

At present, the average sediment concentration calculated based on the research results of sediment-carrying force can only reflect the sediment concentration corresponding to the dynamic conditions of a long period of time, such as the annual average sediment concentration, which cannot reflect the sediment concentration that changes with time during the big waves It is difficult to reflect the process in which the change of sediment concentration lags behind the dynamic change in the measured data

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