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Cloud seeding operation needed to ease drought in certain provinces


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Cloud seeding operation needed to ease drought in certain provinces

 

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SA KAEO, 16 August 2018 (NNT) - The Department of Royal Rainmaking and Agricultural Aviation has launched cloud seeding operations to bring rain to Uthai Thani and Sa Kaeo provinces to ease drought. 

In Sa Kaeo, three sub-districts including Thap Lad, Thap Sadej and Ta Phraya have reportedly seen low precipitation this year. The artificial rainmaking operation, which began on August 11th, has succeeded in bringing rain to 70% of the area. 

Department of Royal Rainmaking and Agricultural Aviation Director-General Surasee Kittimonthon, said today that while heavy rain has been forecast in most parts of the country, a few provinces remain dry. 

In Uthai Thani, rice farmers are advised to seek assistance from village heads should there be a need for cloud seeding. With only 35% of its capacity, Thap Sa Lap Reservoir can now supply water to fewer farmlands.

 
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-- nnt 2018-08-16
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29 minutes ago, Chang_paarp said:

Floods in some parts, and low dams in others.

 

Still don't understand why Thailand persists with the idea that cloud seeding actually works. Most of the rest of the world discredited it as a valid method for promoting rain. 

It works amazingly well during the rainy season.

Sa Kaeo - some annual weather facts from historical climate data:

  • During the months of January, October, November and December you are most likely to experience good weather with pleasant average temperatures.
  • Most rainfall (rainy season) is seen in May, June, July, August, September and October.
  • Dry periods in January, February and December.
  • September is the wettest month.
  • December is the driest month.

https://weather-and-climate.com/average-monthly-Rainfall-Temperature-Sunshine-fahrenheit,sa-kaeo-sa-kaeo-province-th,Thailand

 

 

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36 minutes ago, Chang_paarp said:

Floods in some parts, and low dams in others.

 

Still don't understand why Thailand persists with the idea that cloud seeding actually works. Most of the rest of the world discredited it as a valid method for promoting rain. 

Cloud seeding has lately been proved to work.

The idea is based on that fact water droplets within a cloud system in the 0 to minus 15C can exist without freezing.

( water droplets can exist as a liquid down to minus 40C, think where airframe icing comes from )

The introduction of silver iodide particles starts the reaction producing chain ice crystals on contact, they continue to grow until they start falling through the cloud and at the point they contact slightly warmer air they become rain drops that fall to earth.

Edited by overherebc
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3 hours ago, Chang_paarp said:

Floods in some parts, and low dams in others.

 

Still don't understand why Thailand persists with the idea that cloud seeding actually works. Most of the rest of the world discredited it as a valid method for promoting rain. 

It's a racket. 

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So. to work, it needs clouds?

Is this why the Australian government/air force don't use it in the worst drought in living memory?

Because the skies are cloudless?

Or it's just hokum pokum?

Serious question.
Answers on a postcard to.....

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9 minutes ago, thaiguzzi said:

So. to work, it needs clouds?

Is this why the Australian government/air force don't use it in the worst drought in living memory?

Because the skies are cloudless?

Or it's just hokum pokum?

Serious question.
Answers on a postcard to.....

Ideal conditions are clouds containing super-cooled water droplets in the 0 to minus 15C range. Water can remain liquid down to minus 40C before forming ice crystal. Introducing particals to super-cooled water causes them to freeze into crystals that start to freeze to each other until their weight causes them to start falling ending up as water drops as they reach warmer air below.

Edited by overherebc
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13 minutes ago, overherebc said:

Ideal conditions are clouds containing super-cooled water droplets in the 0 to minus 15C range. Water can remain liquid down to minus 40C before forming ice crystal. Introducing particals to super-cooled water causes them to freeze into crystals that start to freeze to each other until their weight causes them to start falling ending up as water drops as they reach warmer air below.

Thanx, but that didn't answer my question, re Australia.

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4 minutes ago, thaiguzzi said:

Thanx, but that didn't answer my question, re Australia.

Cloudless skies don't contain enough moisture. They will have water vapour but not super cooled water droplets so not the right conditions to kickstart the reaction. If it could start then the high temperatures lower down would probably evaporate the small drops formed back to water vapour and being less dense than air that vapour would just start going back up again rather than reach ground level.

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