Ancient poems about heavy rains are as follows:
1. Black clouds rolled over the mountains without covering the mountains, and white raindrops jumped into the boat.
2. When you asked about the return date, the autumn pond was filled with rain at night in Bashan.
3. The wind is blowing and the rain is falling on the high city, and the clouds are heavy with the sound of thunder.
4. The wind is like a mountain, and the rain is like a river.
5. The wind and rain are like darkness, and the cockcrow is endless.
6. There is no rain on the mountain road, and the sky is green and people's clothes are wet.
7. The tail of electricity burns black clouds, and the feet of rain fly into silver threads.
8. There is a heavy rain and sudden drums and thunder.
9. The spring tide brings rain in the evening, and there is no one to cross the wild boat.
10. The pine trees in the stream are shaking thousands of feet in the rain, and the bamboos in the courtyard are shaking in the autumn window.
11. The wind and rain are blowing, and the rooster crows.
12. The willow branches have been heavily rained, and the pine color is dark with smoke.
13. The day before yesterday was not enough to see the flowers, and the storm was suddenly unwarranted.
14. There are thunderstorms in Jiangcun in the summer, and there are wild rains in the morning and clear in the evening.
Heavy rain (English name torrential rain; rainstorm; stor) refers to rain with high precipitation intensity, often forming in cumulonimbus clouds. China's meteorological regulations stipulate that heavy rainfall with a precipitation of more than 50 mm in 24 hours is called a "heavy rainstorm." It is divided into three levels according to its precipitation intensity, that is, a 24-hour precipitation of 50-99.9 mm is called a "heavy rain".
Those between 100-249.9 mm are called "heavy rainstorms", and those above 250 mm are called "extremely heavy rains." However, due to different precipitation and terrain characteristics in different places, the standards for heavy rain and floods are also different in different places.
In business practice, heavy rains can be divided into local heavy rains, regional heavy rains, large-scale heavy rains, and extremely large-scale heavy rains according to the extent of their occurrence and impact. Local heavy rain lasts only a few hours or dozens of hours, generally affects tens to thousands of square kilometers, and causes relatively minor damage.
But when rainfall intensity is extremely high, it can also cause serious casualties and property losses. Regional heavy rains generally last for 3 to 7 days, with an impact area of ??100,000 to 200,000 square kilometers or more. The disaster is average, but sometimes the rainfall intensity is extremely strong, which may cause severe regional heavy rains and floods.
Extremely large-scale heavy rains last the longest and are generally a combination of multiple consecutive heavy rains in multiple areas. The rainfall can last intermittently for about 1 to 3 months, and the rain belts are maintained for a long time. Extremely heavy rain is a kind of disastrous weather that often causes floods and severe soil erosion, leading to major economic losses such as engineering failures, embankment failures, and crop flooding.
Especially for some low-lying and blocked areas, rainwater cannot be released quickly, resulting in farmland water accumulation and over-saturation of soil moisture, which will cause more disasters.