Rainmaking in the Isaan Region

Surasee Kittimonthon Department director-general  of the Department of Rainmaking and Agricultural Aviation said they will carry out rainmaking operations aiming to fill up 10 reservoirs where the water levels are still low.

The annoucement was made yesterday – Wednesday (Aug 30). In the Northeast: Lam Takhong Dam in Nakhon Ratchasima will be targeted amongst others countrywide.

Rainmaking plane in Thailand

For those not familiar with “Rainmaking” it is the term for  artificially inducing or increasing rainfall usually with airplanes or rockets to sow to the clouds catalysts such as dry ice, silver iodide and salt powder.

Mr Surasee said the decision to do this was made at a meeting on Aug 28 of a subcommittee monitoring the water situation.

It was agreed that the water levels in 10 dams all over the country are still low and should be filled up to ensure sufficient water supplies for agriculture and consumption in the dry season which starts in November.

It is quite surprising that this is needed in the Isaan area after high levels of rain in the wet season but the yearly amounts are still falling short – apparently.

The Rainy season in the north east is between May and October and it receives heaviest rainfalls in Nakhon Phanom and the lightest rainfall is in Nakhon Ratchasima.

However, the amount of the rainfall is quite uneven although 80% of the total rainfall occurs in August and September.

The amount of rainfall in the northeast region (Isaan) is somewhat unpredictable. Average annual precipitation varies from 2,000 mm in some areas to 1,270 mm in the southwestern provinces such as Buriram, Chaiyaphum, Khon Kaen, Maha Sarakham and Nakhon Ratchasima.

The Reservoirs/Dams to be targeted by rainmaking countrywide are:

In the North: Bhumibol Dam in Tak and Mae Kuang Udomthara Dam in Chiang Mai;

In the West: Vajiralongkorn and Srinakarin dams in Kanchanaburi;

In the East: Phra Prong Dam in Sa Kaeo, Klong Siyat reservoir in Chachoengsao, and, Phlung Dam in Chanthaburi;

In the Northeast: Lam Takhong Dam in Nakhon Ratchasima.

In the lower Central: Kaeng Krachan Dam in Phetchaburi and Pran Buri Dam in Prachuap Khiri Khan.

The Royal Rainmaking Operation Centre has been assigned to carry out the operations.



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