Designing method for improving encircled-type harbor basin water body exchanging capacity

Abstract

The invention relates to a designing method for improving the encircled-type harbor basin water body exchanging capacity. The designing method is characterized by mainly comprising the steps that 1 a plane two-dimensional convection and diffusion mathematical model is established; 2 the harbor basin water body exchanging capacity is evaluated; 3 the encircled-type harbor basin water body exchanging mechanism is analyzed; 4 engineering proposal calculation is conducted, and main factors influencing water body exchanging function improvement are analyzed; 5 an engineering improvement scheme capable of improving the encircled-type harbor basin water body exchanging capacity is formed. According to the designing method, the relation between convection and diffusion and the main factors influencing harbor basin water exchanging can be obtained by calculating harbor basin Peclet number distribution, therefore, the mechanism for improving the encircled-type harbor basin water body exchanging capacity is disclosed, optimization design can be conducted on a scheme for arranging a water body exchanging channel, and accordingly, the harbor basin water body exchanging capacity is improved.

Description

Technical field: [0001] The invention belongs to the technical field of port channel engineering, in particular to a design method for improving the water exchange capacity of an encircling harbor basin. Background technique: [0002] With the rapid development of my country's economic construction, deep-water coastline has become an increasingly scarce resource. The use of an encircling harbor basin can effectively increase shoreline resources while preventing waves and sand and reducing sediment back-silting. However, the embracing harbor basin also has its disadvantages. Since there is only one entrance for the tidal current channel entering and leaving the port, the water exchange capacity inside and outside the port area is relatively weak. If pollution occurs in the port area, the polluted water body will not be easily discharged, which will have adverse effects on the environment of the port area. Therefore, it is of great practical significance to solve the problem...

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Problems solved by technology

He Jie et al. proposed in the article "Research on Water Exchange Capacity of Dig-in Dock Basin" published in the Supplement of "Journal of Hydraulic Science" in October 2007, taking the dug-in harbor basin in Nansha Port Area of ​​Guangzhou Port as an example, through the numerical value of tidal current movement Simulating and calculating the tidal volume of the section of the river, and discussing the location and opening method of the connecting river, can effectively play the role of the exchange between the harbor basin and the external water body, but this method still has the following obvious shortcomings: First, the mechanism of water exchange capacity The understanding is not clear, and the engineering measures plan lacks theoretical basis; second, the cross-sectional size of the water body exchange channel has not been studied, and the design parameters of specific engineering measures have not been given

Zhang Wei et al. proposed in the article "Study on Water Exchange and Improvement Measures of Surrounding Harbor Basin" published in "Water Transport Engineering" Issue 04, 2013, taking the planned Xuwei Port Area of ​​Lianyungang as an example, using the convection and diffusion model method to simulate Calculating the half-exchange period of the water body in the encircling harbor basin under the action of tidal currents, in order to explore the engineering measures and effects of improving the water quality of the harbor basin, but this method also has the following obvious shortcomings: first, the mechanism of water exchange in the harbor area has not been studied; The design parameters of the engineering measures are not specified

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