How does human intervention change the avaulability of water in various regions ?

Dear Student.
The correct term is availability.

Human intervention change the availability of water in various regions by the following reasons:

1. By growing crops like sugarcane and rice which require more water, thus flow of water farther downstream gets disturbed.

2. As a result of pollution caused by various factors such as industrial effluents, discharge of sewage etc.

3. As a result of deforestation, pattern of rainfall gets affected and ultimately water bodies gets disturbed.

 
Hope this information will clear your doubts about the topic.
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