Essay On Sources Of Water Pollution

Water pollution as mentioned above occurs due to major discharges from urban areas like effluents and sewage. Fig 2. Most common sources of water pollution

The sources of water pollution can be broadly classified on the basis of three main categories described as follows:

1. On the basis of spatial perspective or Origin: On the basis of origin water pollution can be broadly classified into two categories:

1) Point Source- Point here refers to the single and identifiable source that is responsible for causing pollution. In other words we can say that point sources represents those activities that release their waste directly into the nearby water body. Most common examples include discharge pipes emitting water from factories, sewage treatment plants.

2)

Although truly instantaneous sources do not exist, situation do arise in which contaminants are added to the stream over time intervals, which are short relative to the time-scales of interest. An example of this kind of source is an accidental spill, where contaminants enter a stream in a matter of minutes. This loading can be viewed as the instantaneous addition of mass at a discrete point in time.

TYPES OF WATER POLLUTION

Water pollution has been as serious threats to all life forms from the time immemorial. There are different types of water pollution that come from different sources as discussed earlier. Water pollution can be classified into following categories:

 Surface water pollution- Surface water are those natural water found on the exterior of the Earth’s crust including ocean, lakes and rivers. When these water bodies get polluted one find the pollutants usually afloat. They get polluted by the physical contaminants like plastic bottles, trash from human consumption, oil spills, gasoline wastes etc. that are found floating on the surface of the water bodies. Fig 3.: Surface water