Acoustic assessment of Collichthys Lucidus resources in the winter of 2023 in the cooling water area of Ningde Nuclear Power Plant
The safety of seawater intake for cooling at coastal nuclear power plants is under threat due to blockages caused by outbreaks of marine organisms,with incidents of fish blockages in nuclear power cooling water sources occurring frequently.Acoustic technology,known for its efficiency and real-time capabilities in marine organism detection,is widely applied in the study of marine ecosystems.In order to understand the density and movement patterns of Collichthys lucidus,and the dominant species in the cooling water source intake area of Ningde Nuclear Power Plant during spring,this study utilized acoustic technology to measure and assess the biomass in the relevant marine area.The results of the study indicate that Collichthys lucidus has an average abundance density of 1 964·km-2 and an average weight of 0.483 kg·km-2 based on trawl surveys.The abundance of Collichthys lucidus decreases from the study area towards the direction of the nuclear power plant,with the highest mass density observed in the nuclear power plant's warm discharge water area.Through tracking and analyzing the echo characteristics and trajectories of individual targets during spring,the study assesses the spatial and temporal distribution changes in target intensity,spatial structure,resource abundance and density.The average density of fish in the acoustic survey area is found to be 2.78 × 105·n mile-2,with a mean biomass density of 1.41 × 104 kg·n mile-2.The total resource quantity of Collichthys lucidus is estimated to be 7.47 × 105 kg.The research demonstrates the significant advantages of acoustic technology in measuring biomass in the cooling water source intake area of Ningde Nuclear Power Plant during spring.Through continuous improvement and optimization,acoustic technology can better support ecological environmental monitoring and resource management in nuclear power plant water intake areas,providing scientific basis for the safety of cooling water source intake.
acoustic estimationCollichthys lucidusnuclear power plantcooling water clogging