Device and method for simulating water tank with silt tidal flat wave and current oblique crossing

Abstract

Disclosed is a mud flat wave current oblique crossing simulation method. The method is specially used for simulating the combined bed forming motion of wind wave sediment winnowing and tide sediment transportation on a mud flat. The method is characterized by comprising a mud flat wave current oblique crossing simulation water tank device used in a coast model test and the operating method of the device. The mud flat wave current oblique crossing simulation water tank device used in the coast model test comprises a main current pump, a water tank, an underground reservoir and a wave maker, wherein an outlet of the main current pump is formed in the water inlet end of the water tank, an inlet of the main current pump is arranged in the underground reservoir, the water outlet end of the water tank is connected with the underground reservoir, the main current pump drives water currents to circulate between the water tank and the underground reservoir, and the wave maker is arranged on the left side or the right side of the water tank. The wave current oblique crossing simulation method is specially used for simulating the combined bed forming motion of wind wave sediment winnowing and tide sediment transportation on the mud flat. The riverbed configuration generated by the combined bed forming motion of wind wave sediment winnowing and tide sediment transportation with the mud flat wave current oblique crossing simulation method is basically identical with the natural terrain.

Description

technical field [0001] The invention relates to a simulated flume device and method for simulating oblique crossing of muddy tidal flats in coastal model tests, in particular to a device and method capable of simultaneously simulating wind and wave sand lifting and tidal current sand transport effectively in a muddy tidal flat environment The wave-current oblique simulation method belongs to the field of coastal engineering model tests. Background technique [0002] Muddy tidal flats mainly refer to flats composed of fine-grained sediment distributed in the intertidal zone along the estuary coast. Using abundant tidal flat resources for land reclamation has always been the main measure to alleviate the current contradiction between more people and less land in our country. However, due to the complex hydrodynamic and geological conditions of the estuary, the evolution law of muddy tidal flats under the action of waves and currents has not been fully understood and understoo...

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Problems solved by technology

Therefore, the existing methods are difficult to simulate the influence of the combined action of wind wave sand lifting and tidal current sediment transport on the bed-forming sediment.

[0004] 2. In the existing oblique simulation method of tidal flat wave and current, due to the time series combination of wave cycle and tidal current cycle, it is not possible to simply arrange the wave generator at a non-parallel or non-perpendicular angle with the tidal current direction. Obtain the combined effect of sand lifting by wind waves and sand transport by tidal currents

[0005] 3. Large-scale wave-making systems in harbor basins discretize the wave-making surface and adopt matrix control to simulate the effect of oblique waves and currents. However, the cost is expensive, and the investment and space occupied by a single test are large, which is not conducive to popularization

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