[/size]essay on rivers in kannada for fifth class student

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essay writing topics in kannada language rivers

HUMAN USES OF THE AMAZON RIVER AND HUMAN'S EFFECT ON THE RIVER

Besides walking, the main form of transport for the Amerindians along the rivers is by canoe. These canoes are often quite long, approximately 10 metres in length, and carry great loads of goods. Unfortunately, though, they are not very stable, a small wave can rock and capsize the boat. The crew would lose their cargo and most probably their lives to the piranhas and alligators in the water below.

During the season when the Amazon floods, strong torrents occur, strong enough to rip up enormous trees and great bundles of roots that appear like miniature islands. These torrents hurl the trees down the river. The Amerindians take advantage of these floating rafts and travel downstream on them. This is a very dangerous form of transport, but the only one available during the flooding.

The Amazon is wide and deep enough for large boats to travel from the coast to far into the basin. Once boats along the river were the only form of transport, but now there are many planes flying up and down the Amazon, including seaplanes, which land on the river. Although conventional planes using runways are increasingly important, the Amazon is still highly important for boats and seaplanes that transport goods from the basin to the rest of Brazil and overseas. There are two major roads through Amazon basin, one is east west going from the coast to Peru through the Andes. The other road is north south and connects Brazil with Venezuela and Central America.

Fishing and agriculture are large parts of the economy in the Amazon basin. Cattle ranching is the only major livestock industry. Unfortunately, many ranchers clear jungle to make grasslands for cattle. By doing this, they destroy habitat, and pollute the soil and water.

Rivers are the arteries of a country. Men, plants, and animals cannot live without water. Water is the basis of all life. One of the most important sources of water is rivers.

For centuries, rivers have played an important place in hu­man life. The early civilizations sprang up on the river banks. Ancient people knew the fertility of the river valleys. They settled down there and began to cultivate the fertile valleys. Slowly such river valleys became great centres of culture. Rivers originated in the mountains and they carry down rock and sand and soil from the mountain sides. These rivers enter the plains and their waters move slowly and the solid materials which they carry sink to the bottom and is deposited as fertile soil. When the rivers overflow, the fertile soil is deposited on the banks of rivers. Thus all the rivers are constantly bringing fresh fertile soil to the fields of the cultivators.

Rivers are very helpful to agriculture. Many people depend only on rain water for agricultural purposes. Rivers are the sources of the wonderful irrigation system which has turned deserts into productive farms. River water can be used for agriculture by constructing dams. Proper irrigation helps to convert vast areas of waste land into fertile regions.

Rivers are important highways. They provide the cheapest method of transport. Before the introduction of road and railway transport, the large rivers were the means of transportation and communication. Even today, the traffic on navigable rivers is important. Inland navigation is important in many countries of the world.


Rivers bring minerals down from hills and mountains. Dams are constructed across the rivers to generate hydel power, to preserve wild life, to develop inland navigation, to develop fisheries and to encourage tourism. Thus rivers help a country in its economic growth.

It is a sad thing that people have not realized the importance of rivers. The water rivers carry now contains pesticides and chemicals used as manure and poisonous wastes from factories. The banks of rivers are dirty and unhygienic. It is high time that we put an end to this state of affairs. Rivers must be preserved. We should not wait for the Government to do the cleaning of rivers. People should take the initiative to keep the rivers clean. All western countries keep their rivers and river banks clean and beautiful. Rivers are one of the best gifts of nature. We must strive to keep them clean and preserve them for our own existence and also for the future generation.

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A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases a river flows into the ground and becomes dry at the end of its course without reaching another body of water. Small rivers can be referred to using names such as stream, creek, brook, rivulet, and rill. There are no official definitions for the generic term river as applied to geographic features, although in some countries or communities a stream is defined by its size. Many names for small rivers are specific to geographic location; examples are "run" in some parts of the United States, "burn" in Scotland and northeast England, and "beck" in northern England. Sometimes a river is defined as being larger than a creek, but not always: the language is vague.

Rivers are part of the hydrological cycle. Water generally collects in a river from precipitation through a drainage basin from surface runoff and other sources such as groundwater recharge, springs, and the release of stored water in natural ice and snowpacks (e.g. from glaciers). Potamology is the scientific study of rivers while limnology is the study of inland waters in general.

Extraterrestrial rivers of liquid hydrocarbons have recently been found on Titan. Channels may indicate past rivers on other planets, specifically outflow channels on Mars and rivers are theorised to exist on planets and moons in habitable zones of stars.