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

A simulation method and artificial island technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the lack of methods for simulating the back-silting of artificial island operating areas in semi-closed strong tidal estuaries

Active Publication Date: 2018-07-06
NANJING HYDRAULIC RES INST +1
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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 s

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

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Embodiment Construction

[0060] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0061] The principle of the design method of the present invention is: for the reclamation (such as artificial island) of the estuary bay sand shoal area, the change of the incoming and outgoing tidal volume is caused by two parts. This will further reduce the tidal volume in and out of the bay. Second, the reclamation area itself is a shoal, exposed at low tide, and the artificial island occupies a part of the tidal ridge. After filling, this part of the tidal ridge disappears and changes the distribution of the flow field, causing deep grooves on both sides. The increase in flow velocity compensates for the decrease in tidal volume in and out, which is the effect of the bay's anti-regulation. The tidal volume in and out of the section where the project is located changes little when the enclosing fill is less than or equal to a cert...

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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...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 陆永军左利钦侯庆志王志力莫思平佘小建陆彦刘怀湘季荣耀李寿千朱明成
Owner NANJING HYDRAULIC RES INST
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