Back-silting simulation method for basin channel of force tide firth artificial island operating area

Abstract

The invention discloses a method for simulating back-silting of a basin channel of a force tide firth artificial island operating area. The method comprises the steps of establishing a water flow mathematical model by use of a water flow sediment mutual feedback calculation mode and variable roughness factors changing with geomorphology and tide levels; calculating representative wave radiation stresses at different tide levels; optimizing an artificial island plane modality; performing wave, tide and runoff and sediment discharge coupling fitting; and finally, counting aback-silting amount. According to the method, in a wave current sediment mathematical model construction process, the requirement of basin channel back silting simulation of force tide firth artificial island operating areas with different geomorphologic shapes can be adapted and satisfied for the unique dynamic geomorphology characteristics of irregular coastlines of a semi-closed force tide firth offshore artificialisland, large tidal volume of inflow and outflow of force tides, wide tidal flat and complex geomorphology, strong tidal current under the action of rotary current, high influence of waves and combined action of sediment movements affected by wave currents in consideration of the variable roughness factors changing with the geomorphology and the tide levels.

Description

technical field [0001] The invention relates to a method for simulating back-silting of an artificial island, in particular to a method for simulating back-silting of a harbor basin waterway in an artificial island operation area of ​​a strong tidal estuary. Background technique [0002] Estuary bays are an important type of bays of various shapes developed in the estuary and coastal areas. Their formation is closely related to many factors such as geological and geomorphic conditions and hydrodynamic conditions. It often seriously affects the evolution trend of the bay and the stability of the trough. The reclamation of bay tidal flats is an important way in the development of strong tidal estuaries in history. Excessive reclamation often not only leads to a sharp reduction in the area of ​​the bay, but also causes obvious siltation in the bay due to the reduction of tidal volume. In order to utilize coastal resources scientifically and rationally, strong tidal bays at hom...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem of the lack of methods for simulating back-silting in the artificial island operation area of ​​semi-enclosed strong tidal estuary in the prior art, and provide a method for simulating back-silting of the harbor basin channel in the artificial island operation area of ​​strong tidal estuary

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