3.6. RIVER POLLUTION

The growing domestic, municipal, industrial and agricultural demand for water from rivers naturally affects the quality of water.

As the demand for water increases due to households, industries, and farming, more water is taken from rivers. This increased extraction leads to a reduction in the volume of water in rivers, which can contribute to a decline in their health. When there is less water flow, it can concentrate pollutants, making the water unsafe.

Imagine a communal well in a neighborhood. If everyone starts drawing more water than usual, the well's water level drops. As the water level decreases, the remaining water may contain more impurities since there is less water to dilute them.

On the other hand, a heavy load of untreated sewage and industrial effluents are emptied into the rivers.

Untreated sewage refers to waste from homes that hasn't been properly processed, while industrial effluents are waste products from factories. When these substances are discharged into rivers without treatment, they contaminate the water, leading to pollution that can harm aquatic life and make the water unsafe for human use.

Think of a river as a giant cafeteria where everyone can eat (or in this case, drink). If we keep throwing trash and leftover food into this cafeteria without cleaning it up, soon it will be unfit for anyone to use, much like how rivers become polluted with waste.

This affects not only the quality of water but also the self-cleansing capacity of the river.

Rivers have a natural ability to clean themselves, which means they can break down some pollutants if the flow is strong enough. However, when pollution levels rise due to heavy waste discharge, this self-cleaning process can be overwhelmed, resulting in continuously poor water quality.

It's similar to a clogged kitchen sink. If you regularly wash dishes and keep pouring small amounts of detergent down the sink, it can handle it. But if you dump a whole bucket of grease in there, it might become clogged and start to overflow, preventing any cleaning at all.

For example, given the adequate streamflow, the Ganga water is able to dilute and assimilate pollution loads within 20 km of large cities.

This means that if the river has enough flow, it can mix with pollutants that come from cities and reduce their harmful effects. However, with increasing urbanization and industrial activity, the pollution load often exceeds what the river can handle, leading to high pollution levels.

Imagine pouring a few drops of food coloring into a glass of water. It can easily mix in and you barely notice it. But if you dump an entire bottle in the same glass, the water will become overloaded with color, making it impossible to drink. Rivers are similar in how they handle pollution.

Concern over rising pollution in our rivers led to the launching of various action plans to clean the rivers.

Due to increasing awareness about the poor quality of river water and its effects on health and the environment, governments and organizations have started action plans designed to tackle river pollution and restore cleaner water for communities and ecosystems.

Think of this as a neighborhood organizing a cleanup day after seeing garbage piling up in the park. By coming together to pick up trash and make rules about littering, they aim to restore the park to a cleaner, more usable state.

How does our health get affected by polluted river water? Think about 'life of human beings without fresh water'.

When rivers are polluted, the water that we could use for drinking, cooking, and washing becomes unsafe, which can lead to health problems. Contaminated water can cause diseases, digestive issues, and can even be life-threatening.

If you imagine relying solely on a single water fountain at school that’s been contaminated, anyone who drinks from it would risk falling ill. Similarly, entire communities depend on clean river water for survival, making water pollution a critical issue.

The river cleaning programme in the country was initiated with the launching of the Ganga Action Plan (GAP) in 1985.

In response to the growing alarm about river pollution, the Ganga Action Plan was introduced to focus on cleaning the Ganga River. This initiative was later formalized into the National River Conservation Plan, which aims to improve water quality across other rivers in the country as well.

Similar to how a school launches a recycling program to improve the overall cleanliness of the campus, the NRCP aims at revamping river health to ensure they can reliably provide clean water for everyone.

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