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Water resources are natural resources of water that are potentially useful for humans, for example as a source of drinking water supply or irrigation water. These resources can be either freshwater from natural sources, or water produced artificially from other sources, such as from reclaimed water or desalinated water (). 97% of the water on Earth is salt water and only three percent is fresh ...
In public water supply systems water should, at a minimum, be disinfected—most commonly through the use of chlorination or the use of ultraviolet light—or it may need to undergo treatment, especially in the case of surface water. Water quality is also dependent of the quality and level of pollution of the water source. [citation needed]
India experiences an average precipitation of 1,170 millimetres (46 in) per year, or about 4,000 cubic kilometres (960 cu mi) of rains annually or about 1,720 cubic metres (61,000 cu ft) of fresh water per person every year. [1] India accounts for 18% of the world's population and about 4% of the world's water resources.
Water conservation makes it possible to avoid water scarcity. It covers all the policies, strategies and activities to reach these aims. Population, household size and growth and affluence all affect how much water is used. Climate change and other factors have increased pressure on natural water resources.
NIOS had a cumulative enrollment of about 15 lakh (1.5 million) students from 2004 to 2009 at secondary and senior secondary levels and enrolls about 3.5 lakh (350k) students annually which makes it the largest open schooling system in the world. NIOS is a governing body just like any other Indian government official department [3]
For example, in Delhi water trucks get water from illegal wells on the banks of the Yamuna River for 0.75 rupees per gallon (about US$2.70/m 3). [11] In India, Delhi has the highest usage of household water purifiers/filters. [12] Basic gravity water filter, electric reverse osmosis and ultraviolet filters visible. [13] Standard 20l bottled ...
The Department of Water Resources is one of the departments of Government of Tamil Nadu. The department was split from the Public works department in June 2021 and is responsible for the management and conservation of water bodies in the state.
Key objectives are general protection of the aquatic ecosystem, protection of drinking water resources, and protection of swimmable waters. [23] These objectives are realized through river management measures at basin scale. [4] The WFD requires the delineation of water bodies that will be targeted for specific diagnosis and management measures.