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Physical scarcity definition
Not enough water to meet all demands
Consumption exceeds 60% of the useable supply
Economic water scarcity definition
Lack of investment in water or a lack of human capacity to satisfy the demand for water even in places where water is abundant
The country physically has enough water to meet its needs but requires additional storage and transportation facilities
Examples
Chennai
California
Water quantity
Depends on rate of rainfall evaporation transpiration and river and ground water flows
Less than _ of all freshwater available for people to use
One percent
What is El Niño
A climate ohonemenon triggered by periodic warming of central eastern Pacific Ocean, weakness trade winds and shifts rainfall eastward.
El Niño impact
Depriving regions of typical monsoon moisture, leading to prolonged droughts as reduced rainfall dries soils rivers and reservoirs. Leading to crop failure wild fires and water scarcity