EVENT OF RAINWater is a natural resource that is vital vital for the survival and development of life on Earth . The occurrence of rainfall is strongly influenced by convection in the Earth's atmosphere and oceans . Convection is the transfer of heat by the mass movement of a fluid from one region to another . Water - Water is composed of sea water , river water , waste water , and so are generally undergo a process of evaporation or evaporation due to the help of the hot sun . The water vapor then be floated into the air and eventually continue to move toward the high ceiling with water vapors others .Arriving at the top , the vapors undergo a process commonly referred to as compaction or condensation forming clouds . Moving by wind , the clouds converge and swell and then headed into the earth's atmosphere where the temperature is lower or cool and eventually form ice granules and water . Because it was too heavy and could no longer sustained wind eventually water droplets or ice that falls to the earth's surface , this process is called precipitation process . Due to the lower , resulting in the temperature goes up , the ice / snow will melt , but if the temperature is very low , it will remain a snow fall .
Artificial rain is the latest innovation that allows the process of getting a lot of rain fall and quickly . In order to form an artificial rain , then takes the clouds that have plenty of water levels and wind speeds are slow . Do only that which is needed ? Not only that , there are many more that should be needed . Artificial rain was prepared by seeding clouds with using material that is hygroscopic so that the growth of grains in the rain clouds will increase and will further accelerate the occurrence of rain . Cumulus cloud type is the type of cloud that is great for use as a medium for making artificial rain . After selecting the location of the clouds in the criteria is found , the next step is the seeding process . This process requires media which serves to transport aircraft powders prepared to be deployed in the cloud . The special powder composed of silver iodide glasiogenik form which serves to form ice . Inside the powder , mixed also Sodium chloride or common salt and urea , the materials used for such content contained in the cloud . To be able to establish the torrential rain , it usually takes a special powder that has been described above as much as 3 tons were sown using aircraft to Cumulus clouds for 30 days . The process of making artificial rain is also not necessarily successful . Most important is the spread of seed rain should pay attention to the wind direction , humidity and air pressure . Useful artificial rain to help the area is experiencing drought , filling reservoirs , water purposes , irrigation , and so on . Because this is an artificial rain weather modification technology , the artificial rain can happen at any time without having to wait for the rainy season .
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