Students scurry to school covering themselves with their colourful raincoats and umbrellas. They seem very excited at times to have a shower in the rain. Office goers rush to office to be there on time. Sometimes when there is torrential rainfall, life comes to a standstill. Traffic jams, flooded lanes and by-lanes, people and children wading through the inundated streets are a common sight round this time of the year. Sometimes it is beautiful to watch children making paper boats and floating them in the waterlogged streets.
Most of all, a rainy day declared as a holiday in school is most welcome in this season. The monsoon is a blessing for the farmers across the country as well as for agriculture. Farmers wait eagerly for the monsoon as the rains are very important for the growth of crops. During the monsoon the fields, crops, trees and plants come alive. The whole of nature comes to life in a 'sea of green'.
It is vital that the rains come in time or else delayed monsoon can cause drought; and farming gets heavily affected.
Despite modern methods of farming, the monsoon rains are a reservoir for the farmers and his fields, which in turn is the source of our sustenance. A variety of plants, vegetables and crops grow in the monsoon. Beautiful flowers also blossom in this time. Dry riverbeds are filled by the rain water that is a major source of water for many across the country.
The rainy season is not devoid of its disadvantages. Sometimes the blessings of this season are transformed into a curse on account of natural calamities and disasters. Rising towers or domes are often seen within a Cumulus cloud. Cumulonimbus: They are heavy and dense shower clouds with tops spread out in the form of an anvil. Nimbostratus: They are grey or dark cloud layers from which we observe continuous rain. Monsoon Weather Systems: Over 70 per cent of annual rainfall over India is recorded during southwest monsoon from June to September.
The heaviest rainfall is recorded along west-coast, in which orographic features play important role. It may be mentioned that it is however, not the sole factor of importance for monsoon rain. This type of rainfall is generally of transient nature. Often the intensity of precipitation is very high. On the contrary monsoon rain is continuous rain spread over days and its intensity is not as high as that of convective rain.
The cloud bursts are the result of violent convective activity over small areas of limited extent of course such occasions are comparatively rare. A significant portion of monsoon rainfall over the greater portion of India is closely associated with movement of cyclonic depressions from the Bay of Bengal. When a cyclone or a depression representing a region of low pressure forms in the Bay of Bengal the pressure begins to fall over a wide region of several hundred kilometers.
The wind, in response to the pressure gradient adopts anticlockwise cyclonic circulation. As the depression moves from the head of the Bay of Bengal towards the coast, a belt of heavy rainfall extends to the southern and south-eastern parts of West Bengal and lower Assam. With further movement of the storm westward the rain belt extends to Orissa and Bihar. As the storm proceeds and enters Madhya Pradesh the presence of this depression strengthens the Arabian Sea branch of the monsoon.
This causes another spell of moderate to heavy rain over Madhya Pradesh and southern parts of Uttar Pradesh. The depression then may carry rainfall further to Rajasthan and Gujarat. Sometimes the depression may re-curve towards the north and breakup in the sub-himalayan region of Punjab.
In such situation the Arabian Sea branch of the Monsoon feeds extra moisture in the storm area and heavy rainfall is recorded in Punjab. After a gap of few days, however, the monsoon tends to revive and another depression is formed at the head of the Bay of Bengal.
Thus, with a certain degree of periodicity monsoon rainfall occurs over northern and central parts of India. On an average about 8 cyclonic depressions pass from the Bay of Bengal over the Indian land mass between June and September. The monsoons are also frequently accompanied by violent storms of hurricane type. Sometimes the atmospheric pressure falls much below than what is observed in depression.
In spite of the introduction of improved irrigation methods, there are crops still entirely dependent upon rain-water. Sometimes it is beautiful to watch children floating paper boats in the flooded waters. On a day when it rains cats and dogs and I have a football match or a dance party, I keep repeating the words of the poet: "Rain, rain, go away, come again another day The rivers and lakes overflow their banks, and many villages are flooded. Do not store water in open containers as they may be the breeding place for mosquitoes.
The farmers come out in open fields for cultivation. Due to its vagaries the monsoons create great impact on the Indian Agriculture. Sometimes the blessings of this season are transformed into a curse on account of natural calamities and disasters.
It may be mentioned that it is however, not the sole factor of importance for monsoon rain. On the other hand, if the monsoon continues for too long, it leads to various diseases.
The rainy season is not devoid of its disadvantages.
During the monsoon the fields, crops, trees and plants come alive. During the period of adequate monsoon, we get good agricultural output. They often appear as rolls or rounded masses of clouds.