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How do Natural Disaster affect Water Quality?

13 October 2015


 October 13, 2015
Category Water Quality

Natural Disaster


Natural Disaster is the natural phenomenon which can occur naturally or due to unhandled human activities such as deforestation, unmanaged settlement etc. It can cause huge damage to habitat, wildlife, construction works and other various things that comes in it’s way. Earthquake, flood, drought etc are some of natural disasters. Natural disaster has adverse effect on watersheds, rivers and lakes as well as wildlife and habitat.

Natural water quality differs from place to place, with climate, with the seasons, and with the types of rocks and soils through which water flows and moves. When water from snow or rain moves over the land and through the ground, the water may dissolve or mix in minerals in soils and rocks, filter or seep through organic material such as leaves, roots, and react with seaweed, bacteria and other microscopic organisms. Water may also bring plant waste, rubbish and sand, silt or sediment and clay to rivers and streams making the water appear muddy or cloudy. When water dissolves from streams and lakes, dissolved minerals are more concentrated in the water that remains. Every these natural processes change the water quality and possibility of the water use.



Death of aquatic plants and animals are the prime result of polluted water

Causes of Natural Disaster

1) Deforestation

Deforestation is the prime cause of various natural disaster such as flood and landslide. With the human settlement resulting to the deforestation, it has direct impact on the human. Humans destroys forest for various personal reasons such as to collect woods, grazing of cattle and buffaloes etc. Deforestation leads to long  negative impact on the habitat and civilization of the birds and animals. Flood and landslide occur which destroys life of many people and also sweeps away all the fertile land and species down to river which result in loss of quality of soil and habitat.

2) Uncivilized Settlement

Population of world is increasing in the drastic manner. To occupy all of them requires spaces which results to unplanned and uncivilized urbanization. More people means more junk and waste which mix with water resources to pollute the water. To occupy huge increasing population many wildlife and resources are destroyed which results in Natural calamities.

3) Natural Event

Natural disasters are the natural event. It doesn’t occur at a fix or predicted time. Earthquake is the example of natural event. It can never be controlled. On April 25,2015 Earthquake hit Nepal which resulted in life of various thousands of people. For this kind of natural event we can only follow certain rules so that we can be safe from it.

Effects of Natural Disaster on Water Resources

1) Death of Aquatic Plants and Animals

The major consequences of water pollution is the death and extinction of aquatic plants and animals. Death fish, sharks etc are often seen on the beach of the oceans due to the polluted water. It has also resulted to extinction of various aquatic plants and animals.

2) Disruption of Food Chains

Water pollution disrupts the aquatic food chains and environment. Pollutants such as lead and cadmium are eaten by tiny animals. Later these animals are consumed by large fish which directly results to disruption of the food chain environment.


3) Water-borne Diseases

Humans are also the prime target of water pollution. They acquire the sea animals which has been poisoned which results to diseases like hepatitis in human. Various water borne diseases are also infected with the polluted water.


Various kinds of natural disaster and unmanaged human activities has polluted the water

Prevention of Natural Disaster

Natural Disaster are the natural event so it cannot be totally controlled but the consequences can be prevented. Like planting the trees in the stiff hills can prevent the flood and landslide, building standard houses and buildings etc can prevent the consequences of the natural disaster.  Some of the preventive measure of Natural Disaster are as follows:

1) Afforestation

Afforestation is the way of establishing the forest where previously there was on any. Planting the trees in stiff hills can drastically control the effects of flood and landslide. It is the most effective way of preventing the natural calamities. Public awareness about planting trees also motivates individual to plant the trees. Bhutanese King planted thousands of trees in the birth of the new prince in the country.


Plantation in steep hills drastically reduce the chance of flood and landslide during rainfall

2) Building Tactile Buildings and Monuments

Building well standard buildings and monuments helps to reduce the consequences when the natural disaster occur. Since these kinds of calamities are unpredictable so we should follow standard method to build the buildings so that it remain tactile during calamities. Nepal’s Earthquake on 2015 resulted in huge loss of humans due to the poor quality of buildings and monuments.

3) Public Awareness

Many uneducated people don’t know how to react when this kind of calamities occur. In of sudden they rush here and there which again results in more death toll than the consequences of calamities. So, Public awareness programmes should be conducted so that uneducated people can react to this situation. This kind of activities can bring positive response to the society.











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