Climatic characteristics of dragon boat water

1. During this period, the warm and humid airflow in the south is active, and when it meets the cold air from north to south in Guangdong, Guangxi, Fujian, Hainan and other places, there will often be continuous heavy precipitation, thunderstorms and windy weather.

2. After April every year, South China has entered the first flood season in the meteorological sense, with an obvious increase in rainfall and a high river level.

3. At this time, if the astronomical tide or storm surge is propped up, the drainage speed of the river will be greatly slowed down, or even the tide will flow backwards, and the water level will rise rapidly, which is easy to cause floods. This period is an important season for the growth of early rice. In case of rainstorm, flood and typhoon, it will have a serious impact on early rice, resulting in rice lodging and no grain harvest. Therefore, people call the heavy precipitation process around the Dragon Boat Festival on the fifth day of the fifth lunar month "Dragon Boat Water".