Study On Wind Shelter Capacity Of Fishing Port Under The Influence Of Typhoon

The establishment of fishing port is one of the symbols of the modernization of human society.It is a port for fishing boats and auxiliary fishing vessels to berth,shelter from wind and load and unload.It is an important part of the coastal economic development and disaster prevention system.With the continuous development of social economy in coastal areas and the current situation of fishing port construction,under the general trend of global climate change,fishery has been difficult to meet the new needs of improving production safety and disaster prevention and reduction.Guangdong Province is located in the southern coast of China,with numerous estuaries and harbors.It is the province with the largest number of landings and landings of typhoons in China.There are still many difficulties in the construction of fishing ports,such as fewer fishing ports for shelter,insufficient area of effective harbor pool,and unclear wind shelter capacity and berthing capacity.Based on this,this paper takes Hongwan Central fishing port and Zhapo Central fishing port in Guangdong Province as examples,takes the wind shelter capacity and berthing capacity of fishing port as the research object,and combines the MIKE 21-SW spectral wave model with the Holland typhoon model to simulate the wave characteristics of Hongwan Central fishing port and Zhapo central fishing port under the effect of extreme weather typhoons "Haitian" and "Chapaca".The ability of resisting platform and avoiding wind in the central fishing harbor of Zhapo is evaluated.The research results have reference significance for the windward area,berthing space and quantity of ships in central fishing ports under extreme weather,and provide reference for the windward capacity and safe production of fishing ports.The results show that the root mean square error and d trend of the simulated and measured values are at a good level,which can well simulate the distribution of typhoon waves during the transit of typhoon.During the passage of Typhoon Higos,the maximum effective wave height in waters near the central fishing port of Hongwan exceeded 0.9m.A total of 1,059 fishing boats can be berthing,and the sheltered area accounts for 99.03% of the total area of the port.By changing the relevant characteristic parameters of typhoon,when the typhoon rose to one level,the sheltered area of Hongwan Central fishing port decreased by 1.2%,and 78 fishing boats had no place to berth.During the passage of Typhoon Cempaka,the maximum effective wave height in the waters near the central fishing port of Zhapo exceeded2.2 meters.1638 fishing boats could be anchored,and the sheltered area of the fishing port accounted for 73.96% of the total area.By changing the relevant characteristic parameters of typhoon,when the typhoon rises one level,the sheltered area of Zhapo central fishing port decreases by 7.7%,and 96 fishing boats have no place to berth.By calculating the effective shelter area of the fishing port,the shelter and anchoring capacity of the fishing port can ensure that the fishing port can safely shelter in the fishing port when the strong wind comes,minimize the possible disaster losses caused by the typhoon,and ensure the sustainable development of the coastal economy and society of Guangdong Province.The purpose of this study is to determine the corresponding anchoring capacity and anchoring area,so as to ensure the safe return of fishing boats to the port during the typhoon transit.The research provides a good reference for the coastal fishing ports which are often attacked by extreme weather such as typhoons and has important practical significance.