Study On The Risk Assessment Of Storm Surge In Cangnan County

Cangnan county is located in the most southern tip of Wenzhou City, Zhejiang Province, in which one of the most important marine disasters is Typhoon storm surge,that On average,3.6 typhoon storm surges occur each year. This paper combined with the actual situation of typhoon storm surge disasters in Cangnan county, through the investigation and other means to collect all kinds of disaster bearing body data,such an the Cangnan County coastal dike pond, land use present situation,etc., using the ADCIRC storm surge model which is widely used at present to calculate the storm surge inundation. Respectively the storm surges of 6 typhoon levels added to the mean high water level during June to October are studied in this paper,meanwhile,this paper is estimated the storm surge area and carried out the statistics of disaster bearing bodies in the flooded area. In the model calculation the impact of the change of bottom friction caused by the difference of ground objects is considered. Based on the storm surge water depth data, Cangnan County land use present situation, Analyse the storm surge disaster risk and the vulnerability of disaster bearing body in accordance with established methods, and finally storm surge disaster risk rating map is got.