Page 29 - Demo

1. Seeding of granulated dry ice and spraying of plain water into clouds (the methods used in other countries).
2. Modification was made to method No.1 by using concentrated table salt solution instead of plain water.
3. Modification was made to method No.2 by applying it to make a cold curtain above a target area in order to attract rain clouds into the area, and increase rainfall.
• In 1971
Royal Rainmaking experiments were carried out to increase water volume of Ubonrat Dam in Khon Kaen Province and Bhumibol Dam in Tak Province. They were scheduled to operate every fortnight. However, there was a severe drought covering a large area that year and rice farmers submitted a petition to His Majesty to request for Royal Rainmaking. Since then, the MOAC has formed the Royal Rainmaking Unit to operate relief missions. Therefore, research and development of techniques for rainmaking were conducted alongside with rescue operations for farmers. The development progress of Royal Rainmaking methods during these years can be summarized as follows:
Early in the year, the method used by the Royal Rainmaking Project was the one from the first set of experiments (i.e. the use of dry ice and concentrated Sodium Chloride solution, and building of a cold curtain above target areas).
Later in that year, from October 31st to November 15th, 1971, Sodium Chloride (NaCl) in form of powder was first used in Royal Rainmaking operations at Petchabun Province. It is very dry table salt, finely ground into powder like flour. It was later called “Royal Rain Salt Flour” or “Formula 1”.
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