ASSIGNMENT
Geo
Date - 20-10-18
Need for conservation and management of
water resources.about 100 words)
Answers
Explanation:
Some quick Facts and Figures
The total volume of water on earth’s surface- 96.5%
The total volume of usable freshwater- 2.5%
The volume of freshwater in ice-sheets and glaciers- 70%
Stored groundwater- 30%
Precipitation (rainfall) in India- 4% of earth’s total
India’s rank in the world for water availability per person (per annum)- 133
Conservation & Management of Water Resources
‘Water water everywhere, not a drop to drink.’ It is a very old saying in a different reference to the situation. But, this is exactly what we fear will happen very soon, if we do not wisely use and conserve our water resources.
Research shows that by 2025, India, along with many other countries will face a serious scarcity of water. Many regions in our country are currently undergoing the process of ‘water stress’. According to a research by Falken Mark, a Swedish expert on water, ‘water stress’ happens when the water availability falls below 1000 cubic meters per person per day.
How did we reach here?
water resources(Source: Wikipedia)
Though blessed with large rivers like the Ganga, Yamuna, Godavari, Narmada, and others, India’s socio-economic development has a lot to contribute to decreasing water resources. Rising population, industrialization, urbanization and modernization of agriculture, are some of the main reasons for water shortages in many parts of the country. As a result, most of our prominent rivers, especially the smaller ones have become toxic with waste products and pollution.
Saving our Water Resources
Water is indeed an essential resource for life on earth and it must be conserved. In fact, historically, humans had learned to conserve the available water resource by building dams.
Dams
water resources
(Source: Wikipedia)
Dams are simply hydraulic structures that act as a barrier between the source and destination of flowing water. Earlier, these dams were small and hand-made. In our modern society, engineering techniques and methods are used to construct most of these dams.
Depending on its need, the water flow can be obstructed, redirected or slowed down using a dam. The barrier often creates a small reservoir or a lake, collecting the excess flow of water. People use most dams for irrigation. While some dams are used for generating electricity, which we know as ‘hydropower’ or ‘hydro energy’.
Dams can be of different types and of various sizes. While timber dams are made from wood, the masonry or embankment dams are made with stones and concrete. Dams can also be low, medium or high in height, depending on their location and usage. Though dams can be helpful in conserving water resources, too many of them can also cause over sedimentation of the river beds.
Also, over usage of dams can reduce the aquatic life of the river, on which they flow. That is why we also have more natural and long-lasting methods of saving our water resources.
Answer:
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Explanation:
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