Abstract：Qiantang River is famous in the world for its strong tidal estuary in the world. Based on historical documents,this paper summarized the distribution characteristics of tidal disasters across time and space. Firstly,tide disasters occurred more frequently in the north shore compared with the south shore. The number of tidal disasters hitting the upstream of Haimen was not significantly different from that for the downstream of Haimen,although both of estuaries had smaller numbers of tidal disasters when comparing with the Qiantang Estuary. Secondly,tide disasters distribution in space has changed,leding to an apparent successive variations between stable period and eruptive period, but the length of the stable period and eruptive period was not fixed. Thirdly,the intensity change of tidal disasters was quite strongly related to their frequency distribution. High strength tidal disasters occurred more frequently during the eruptive period. Additionally,this paper discussed the influencing factors on the tidal disasters distribution across time and space, in combination with the natural environment background,such as historical climate,channel topography and so on. Results of this study suggests that the frequency and grade of tidal disasters of Qiantang River are related to the changes of historical rainfall and temperature in this area. However,the extreme tidal disaster was caused by the coupling processes of multiple factors.
Wang Shen,Yue Shu-Bo,Zeng Jian. Spatial and temporal distribution of tidal disasters in Qiantang River estuary during Ming Dynasty (AD 1368-1644) and its influencing factors[J]. JOPC, 2019, 21(4): 685-694.
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