Tab.1 Annual frequency distribution of various rainstorms in Northeast China
| Large Area Heavy Rainstorm | Regional Rainstorm | Local Heavy Rainstorm | |||||||
|---|---|---|---|---|---|---|---|---|---|
| Liaoning Province | Jilin Province | Heilongjiang Province | Liaoning Province | Jilin Province | Heilongjiang Province | Liaoning Province | Jilin Province | Heilongjiang Province | |
| April | 1 | 2 | 2 | 1 | 10 | 2 | 2 | ||
| May | 3 | 1 | 17 | 12 | 6 | ||||
| June | 2 | 14 | 4 | 56 | 76 | 66 | |||
| July | 31 | 3 | 2 | 76 | 37 | 23 | 165 | 209 | 189 |
| August | 31 | 11 | 3 | 80 | 42 | 31 | 156 | 142 | 137 |
| Septmber | 2 | 14 | 4 | 3 | 56 | 26 | 32 | ||
| October | 1 | 14 | 5 | 4 | |||||
| November | 1 | ||||||||
| Sum | 67 | 14 | 5 | 190 | 90 | 58 | 474 | 473 | 436 |
| average annual rainfall | 2.09 | 0.41 | 0.17 | 5.94 | 2.65 | 1.93 | 14.8 | 13.9 | 14.5 |
| Proportion of various rainstorms | 9.2 | 2.4 | 1.0 | 26.0 | 15.6 | 11.6 | 64.8 | 82.0 | 87.4 |
From the table we can see, local rainstorms occur most frequent , accounting for 65~88% of the total number of rainstorms, followed by regional heavy rain, accounting for 12~26%, the largest range of Rainstorm at least, accounting for 1~10% of the total number of rainstorms. The regional distribution of regional rainstorm and super range rainstorm is very different. The regional rainstorm occurred 190 times in Liaoning Province, 3.3 times of Heilongjiang province's 58 times, and Jilin province is between them. The occurrence times of super range rainstorm have greater differences between the north and the south in Liaoning Province, and there were 67 times of Heilongjiang Province, Liaoning province is only 5 times, 13 times in Heilongjiang province. In short, the distribution of rainstorm frequency has the trend of more in the South and less in the North.
The information is provided from Disaster Risk Reduction Knowledge Service.
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