As a country that lies on the equator Indonesia has two seasons, the rainy season and dry season. The rainy season usually begins in October until March. The rainy season is very profitable, some farmers who had long water shortage and some areas of drought. However, some areas with bad environment will be floods. When the rainy season almost daily hujang
Rain is a precipitation event that is the fall of the atmosphere fluid which is a liquid or frozen to the earth's surface. Rain requires the presence of a thick layer of the atmosphere in order to meet suhi above the melting point of ice near and he was on the Earth's surface.
On Earth, the rain is a condensation process (change states of matter to form denser) atmospheric water vapor into droplets of water heavy enough to fall and usually arrive on the mainland. Two possible mechanisms can simultaneously push the air gets saturated before the rain, the cooling air or adding water vapor to the air. Raindrops have sizes ranging from a similar bending (large grains), until small granules.
A. Process of Rain
Rain that we often see in the rainy season can be defined as events fall of water from the sky to the earth. In a simple event of rain associated with water cycle can be explained as follows.
- At first the rain water comes from evaporation or called evaporation from water on Earth, such as sea water, river water, lake water. Even from such living beings of the human body, animals, plants containing water, will be vaporized to form rain. Evaporation happens that due to relief from the hot sun.
- Once the water evaporates into the air, high into the sky, the vapor undergoing a process of compaction or condensation to form a cloud. With the help of clouds that can move vertically as well as horizontally.
- Due to wind or air moving, the clouds converge and enlarged towards the sky or the earth's atmosphere where the temperature is low or cold, eventually forming ice grains and water.
- Due to the weight and not being able sustained in air, water droplets or ice falling to the earth is called precipitation process. The higher the air temperature, the ice or snow that formed melts into water, but Juka temperature is very low then it will fall remains as snow.
B. Type Rain
Meteorologists have only recently just know the process of formation of rain clouds in detail, along with form and function, by using advanced equipment like planes, satellites, computers, etc. On the territory of the Republic of Indonesia can be encountered three types of rain that falls, among other things:
- Frontal rain. Rain frontal rain is caused by the convergence of summer winds that bring moist air moist with a low-temperature cold air, causing condensation in the air, which in turn lowers the rain. The meeting place between two masses is called a front field. Around the front field is often heavy rainfall called frontal rain.
- Orographic rain. Rain orographic rain is caused by the presence of water vapor that is carried or blown up to ride up the mountain and forms clouds. When the cloud has reached saturation point then it would rain. There was rain is usually in the surrounding mountains.
- Zenital rain. Rain is rain that causes the zenith is the hot temperatures at the equator to trigger evaporation of water into the sky meets the cold air into the rain. Rain zenith occurred in the vicinity of the equator line only. Rain is due to meeting with Northeast Wind Pasat Pasat wind Southeast. Then the wind rose and clouds forming clots.
C. Benefits of Rain
Even if a large amount of rain can be catastrophic for humans, but the rain is also very beneficial for life on earth. Here are some of the benefits of rain for life on earth.
- The rainwater that fell on the earth's surface give good impact to the lives of farmers. When the rainy season comes a lot of farmers who do their work dis UNDER for planting rice and wait for the harvest work because it has many advantages for farmers'
- Rain water fell from the sky is very useful for the human life to meet basic needs in their daily lives. Humans take advantage of the ground water to be managed back in meeting their needs.
- Rainwater also contributed to the human economy because rain water is also an important role for human tasks such as the processing of forestry, fishery, and agriculture. Agriculture and fisheries need water. Rainwater very important role in the field of fisheries because whenever it rains the water in the sea, rivers and lakes. river river also has several benefits for human life.
- The rainwater that fell to the earth's surface plays an important role in preserving the environment, such as for plant photosynthesis, the planting of trees in the forest and to plant itself.
- Rainwater is very important for the survival of the forest because in many forest animals, plants, trees depend on water.
- The rain water is very important to keep ground water sources karen rainwater down the earth's surface will absorb into the surface layer of soil as the water reserves stored in a certain depth.
When it rains, vary the way we react to it. There is a happy, happy, and full of joy because of the long rain did not fall. But many are annoyed, angry, annoyed and disappointed, because they feel harmed by the rain. For those who are happy with the rain, of whom are farmers. Therefore, the rain will fertilize barren land or barren. Rain makes the plants become fertile, so the income will increase.
But the rain fell continuously, sometimes also be a disaster for farmers. Continuous rain that can cause damaged plants. Especially if it comes to flooding, farmers often complain because the plants become parched or crop failure.
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