The synthetic study of tide disasters will benefit to understand the tide disasters comprehensively,and prove the significance of synthetic study as an example.

A serious tide disaster had occurred on the coast of Lingao and Danzhou whichlie in northwest of Hainan Island between evening on Nov,26,2003 and morning on Nov,27,2003.

The impact of sea level change on tidal disaster intensity is analyzed,and on that basis,more than 2?000 records about tidal disasters which happened in the last 2?000 years are statistically analyzed.

In the ancient tide culture,the character "Chao" has the two different meanings that are respectively the periodic tide and the non-periodic tidal disaster.

The present article aims at analyzing the actual situation of the ever increasing happening of the red tide along China's coast areas in recent years and the ways on how to predict their happenings timely.

By means of GM(1,1) method we forecast the years that storm surge disaster happened.

Historically, Jiangsu frequently harassed by storm surge disasters in fact, which actually caused huge losses.

By means of systematic colletion,discrimination and evaluation on the historical documents of Northern Jiangsu coastal storm surge disasters in the Qing Dynasty,the article consulted the established rating method and completed the reconstruction of storm surge disaster grade series from description to numerical translation.