Analysis of Flood and Tide Encountering Characteristics in the Main Stream of Feiyun River(Rui'an Station)
To grasp the characteristics of water level changes in tidal sections,reasonably determine the design water level,the flood and tide encounter law of the main stream of Feiyun River is studied based on the statistical analysis method of measured data from two aspects:frequency encounter and time encounter.The results indicate that there is a random occurrence of flood and tide in the main stream of Feiyun River.In terms of frequency,floods with a return period of 10 years or more mainly encounter high tide levels with a return period of 2~3 years or less.High tide levels with a return period of 10 years or more have not encountered floods with the same frequency or above,and the maximum flood encountered is once every 5 years.In terms of time,from 1958 to 2015,there were only floods and tides encountered in 1988 and 1990.
flood and tide encounterfrequency encountertime encounterFeiyun RiverRui'an observatory