In the olden days, people use to live on the banks of river as most of them used to do agriculture. In the present days, people preferring to stay (live) nearer to their place of work. As the technology increased, several industries have come up. People working in those industries are living nearby to their work place. Hence, the cities are growing. The density of population in the cities increased tremendously. Due to which we are facing Water Scarcity. Though the Earth has about 71% of water, many people are suffering with water scarcity.
The famous lines of poam "Rime of the Ancient Mariner" wriiter by S.T. Coleridge in 1798.
"Water water every where
Nor any drop to drink"
In the courtiers like America, and several major cities in some countries are facing the problem of water. But, if we go to remote villages, the lives are quite natural and they don’t have such problem. The difference is in the life style. A person in the Villages always saves nature. But people in city bothers about their duties, but forget the basic responsibility to save nature. Hence, the Scarcity occurred.
How it happened?
As the life style of human being changed, many were migrated to cities. Built Industries to overcome unemployment problem and to produce the products of their companies. Built pucca (permanent) houses with concrete roof and Cemented walls to save ourselves. Built wide several flyovers and wide roads with Cement and thaar, not leaving the place for plantation. Due to such huge constructions, an obstruction to suck the water, lead to deplete the water table. This is major cause of scarcity. Due to heavy work pressure in their industries (or workplaces), people have forgotten the basic responsibility to save nature.
In the cities facing problem of water, under the present situations, people have to save the existing water and utilize in a proper way without any wastage.
The amount of water recommended by the United Nations for drinking, washing cooking and maintaining proper hygiene is a minimum of 50 liters per person per day. This amount is about two and a half buckets of water per person per day.
You may afraid the continuous use of water will someday exhaust all the water available for use, but we need not have to bother about this as the nature have been maintained for millions of years by various processes which make water cycle. Hence, our responsibility is to manage water by cooperating with the different natural processes. Ground water management is most important to manage water.