Seabed sand wave evolution simulation method

Abstract

The invention discloses a seabed sand wave evolution simulation method, which comprises the following steps of: acquiring characteristic hydrodynamic parameters of a research area by establishing a hydrodynamic numerical model based on a shallow water equation by utilizing water depth data and tide division data of an international public database; and based on the characteristic hydrodynamic parameters, integrating a vertical two-dimensional sediment geomorphic model to predict seabed sediment wave characteristics and activity, acquiring characteristic geomorphic wavelengths and characteristic geomorphic wave heights, and simulating the sediment wave evolution process in the target sea area and predicting the sediment wave evolution form. Multiple numerical calculations are combined, under the condition of less basic data, the wave length and wave height characteristics of the seabed sand wave can be predicted more efficiently, the evolution of the seabed sand wave can be simulated, the simulation accuracy is higher, the simulation result is more reasonable, the existing public database data is fully utilized. Time cost and economic cost are saved, and reference opinions can be provided for ocean engineering infrastructure and pipeline arrangement.

Description

technical field [0001] The invention relates to a method for simulating dynamic geological geomorphic environment in coastal marine engineering, in particular to a method for simulating the evolution of seabed sand waves. Background technique [0002] With my country's vigorous development of marine resources, marine engineering facilities have gradually increased, mainly including structural foundations, oil and gas pipelines, submarine cables, etc. These engineering equipments are in the complex marine dynamic environment, once damaged, it will bring huge economic losses. In addition to the marine dynamic environment, the seabed topography will also affect the safety of engineering facilities, especially the highly active sand wave terrain. Changes in morphological characteristics such as sand wave growth, migration, and evolution may cause pipeline suspension, burial, etc. . [0003] Submarine sand wave topography exists widely in shallow sea shelves in various waters a...

AI Technical Summary

Problems solved by technology

The evolution scale of sand wave is very slow compared with the scale of hydrodynamic change. The spatial scale of the sand wave area is mostly tens of kilometers. In order to avoid the influence of boundaries, the calculation area needs to be set to a large range, resulting in very low calculation efficiency

In addition, due to the complexity of the marine environment, unreasonable results may be generated due to the neglect of some physical processes during the calculation process

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