precipitation is subject of the mechanism of Southeast Asian monsoon circulation and impact of the topographic conditions, should correspond with the northeast monsoon. In one year of existence is season 2: the rainy season (rainfall, > 100 mm with frequency ≥ 75%) lasted four months, from September to December. The dry season (< 100 mm of precipitation, with a frequency of ≤ 75%) lasted eight months, from January to August. The average rainfall in the region of study vary from 2500 to 3000 mm. Turn the years of rainfall maximum and minimum 2 2. The main maximum occurs in October, with rainfall from 924 to 762 mm, extra maximum occurs in may or June (precipitation leads to Xiaoman) with rainfall from 77 to 225 mm. main minima occur from February through April, with rainfall from 34 to 85 mm, extra minima occurred in July with the rainfall from 71 to 110 mm.
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