Dought index(scPDSI)

Dought index(scPDSI)

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After 2000:
• Overall drought trend
• The drought trend in the Lancang River Basin is significantly stronger than the Mekong River Basin
• Most of the years in the Lancang River Basin are dry years, and the Mekong River Basin



3  Rainfall index
According to the intensity of precipitation, the Chinese meteorological department usually divides the rainfall into four equals:
Light rain: Within 24 hours, the rainfall is equal to or less than 10 mm.
Moderate rain: within 24 hours, the rainfall is between 10 mm and 25 mm.
Heavy rain: Within 24 hours, the rainfall is between 25 mm and 50 mm.
Heavy rain: Within 24 hours, the rainfall is above 50 mm. If the rainfall is more than 100 mm within 24 hours, it is a heavy rain. More than 200 mm is a heavy rainstorm.