Question

any 5 causes of pollutions of river Koyal

Answer 1

five causes are
1.urbanization

Rapid urbanisation in India during the recent decades has given rise to a number of environmental problems such as water supply, wastewater generation and its collection, treatment and disposal.

2. industries

Most Indian rivers and other sources of fresh water are polluted by industrial wastes or effluents. All these industrial wastes are toxic to life forms that consume this water. The total wastewater generated from all major industrial sources is 83,048 MId which includes 66,700 Mid of cooling water generated from thermal power

3.agriculture runoff and improper agricultural practices

Traces of fertilizers and pesticides are wasted into the nearest water-bodies at the onset of the monsoons or whenever there are heavy showers. As the point of entry of such agricultural inputs is diffused throughout the river basin, they are termed as non-point sources of pollution. Although irrigation has increased considerably in the country, little precious has been done to tackle the problem of the high salinity return water.

4.Withdrawl of water


Indian rivers, particularly the Himalayan Rivers, have plenty of water in their upper course. They are, however, starved of water when they enter the plain area. Irrigation canals whisk away clean water soon after the rivers reach the plains, denying water to flow in the river downstream.

5.Religious and social practice

Religious faith and social practices also add to pollution of our river waters. Carcasses of cattle and other animals are disposed in the rivers.

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Answer 2

Urbanization
Industries
Withdrawal of water
Chemicals