Artificial Rainfall

ARTIFICIAL RAINFALL …..[cloud seeding]

BATCH NO. H-1

Prepared by……. • Aditi Boraste. • Kalyani Borse. • Hemlata Hinde. • Tejasvini Bhamare. • Priyanka Baviskar.

INTRODUCTION Artificial rainfall is also known as Cloud Seeding.  Cloud seeding is a weather modification system that aims to boost precipitation or rain by introducing condensation nuclei such as salt or dry ice. 

Water and rain represent life of the Holy Spirit. Revival is sometimes referred to as the latter rain experience.

1st Stage The first stage is Agitation. That is using chemicals to stimulate the air mass upwind of the target area to rise and form rain clouds. The chemicals used during this stage are calcium chloride, calcium carbide, calcium oxide, a compound of salt and urea, or a compound of urea and ammonium nitrate. These compounds are capable of absorbing water vapor from the air mass, thus stimulating the condensation process.

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The second stage is called Building-up stage. Here the cloud mass is built up using chemicals such as kitchen salt, the T.1 formula, urea, ammonium nitrate, dry ice, and occasionally also calcium chloride to increase nuclei which also increase the density of the clouds.

3rd Stage In the third stage of bombardment chemicals such as super-cool agents: silver iodide and dry ice are used to reach the most unbalanced status which builds up large beads of water (Nuclei) and makes them fall down as raindrops. The process is called seeding.

Chemicals The most common chemicals used for cloud seeding include Silver Iodide and Dry ice (frozen carbon dioxide). The expansion of liquid propane into a gas has also been used and can produce ice crystals at warmer temperatures than silver iodide. The use of hygroscopic materials, such as salt, is increasing in popularity because of some promising research results.

Requirements…. In planning, every stage a high degree of expertise and experience is required, in selecting the types and amounts of chemicals to be used, while taking into consideration weather conditions, topographical conditions, wind direction and velocity as well as the location or delimitation of the area for chemical seeding. Several other ideas are also involved in rain making. Rockets containing rain-

A jet of rain-making chemicals is shot from a highly pressurized canister directly into the cloud base, so as to coerce clouds which normally hang above mountain tops to cluster up and rain on the mountain or their slopes.

CHINA'S RAIN CANNON BLOG

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THESE RADDARS KEEP UPTO DATE INFORMATION OF THE WEATHER CHANGES.

Disadvantages 

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[1] The Chemicals used in the production of artificial rain could affect climatic patterns, ecosystem, water sources and the soil. [2] Once started this process is uncontrollable. [3] Cloud Seeding causes Flood's, Hurricane's and Thunderstorm's which result's in loss of many lives.