Method for calculating source intensity of seawater suspended sediment generated by submarine cable laying

Abstract

The invention discloses a method for calculating seawater suspended sediment source intensity generated by submarine cable laying, which comprises the following steps of: S1, fixing a turbidity meter on submarine cable trench ditching equipment, and monitoring the suspended sediment turbidity of seawater near a submarine cable trench in real time by the turbidity meter after the submarine cable is laid; s2, the real-time suspended sediment concentration of the seawater is obtained according to the relational expression of the suspended sediment turbidity of the seawater and the suspended sediment concentration; and S3, multiplying the real-time suspended sediment concentration by the jet flow of submarine cable trench ditching equipment, and calculating to obtain the real-time seawater suspended sediment source intensity generated by submarine cable laying. According to the method, the turbidity of the suspended sediment near the submarine cable trench can be monitored in real time only by fixing the turbidity meter on the submarine cable trench ditching equipment, the source intensity of the suspended sediment generated by laying the submarine cable can be calculated through a monitoring result and theoretical analysis, the problem that the source intensity of the suspended sediment generated by laying the submarine cable is difficult to determine can be solved, and the reliability of the submarine cable trench is improved. The method is of great significance to research on environmental influence actually generated by ocean engineering submarine cable trench excavation construction activities.

Description

technical field [0001] The invention belongs to the technical field of offshore wind power engineering, and in particular relates to a method for calculating the source strength of suspended sediment in seawater generated by submarine cable laying. Background technique [0002] With the rapid growth of domestic demand for new energy, offshore wind power projects in Guangdong, Fujian, Zhejiang, Shanghai, Jiangsu, Liaoning and other near-shore areas have increased rapidly, and are developing from near-shore to deep-sea areas. The laying of submarine cables involved in the construction of offshore wind power projects will disturb the bottom of the water, that is, the excavation of the submarine cable trenches during the laying of submarine cables will disturb the bottom of the water, and the resulting high turbid water mass of suspended sediment will be transported and diffused under the action of hydrodynamic conditions. , increasing the concentration of suspended sediment in ...

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Problems solved by technology

[0004] The invention provides a method for calculating the source strength of seawater suspended sediment produced by submarine cable laying. The method can solve the difficult problem of determining the source strength of suspended sediment for submarine cable laying in offshore wind power projects, and is useful for studying the actual environmental impact of marine engineering construction activities. of great significance

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