Multipurpose river valley project, advantages and disadvantages - NCERT Solution
Multipurpose river valley project, advantages and disadvantages – NCERT Solution
Distinguish between the advantages and disadvantages of multi-purpose river projects
What is multi purpose river project
A multipurpose project (also known as a multipurpose river valley project) accomplishes multiple goals at the same time. A multipurpose project for dam construction across a river that serves more than one function at the same time can also be termed as a multipurpose project. It has a lot of benefits while still having some drawbacks.
Advantages of multi-purpose river projects- Advantages of multipurpose river valley project:
To produce irrigation facilities and to push navigation through canals
To conserve water and soil resources
Produce hydro-electric power
To store water which might be used when it is in greater demand
Disadvantages of multi-purpose river projects –Disadvantages of multipurpose river valley project:
The natural flow of water is harmed by the multipurpose project.
It causes heavy sedimentation at the river’s bottom, making streambeds harder.
It degrades marine life habitat because the dam floods off the vegetation and soil on both sides of the river, resulting in flood plains.
For a variety of reasons, multi-purpose projects and big dams have received lots of criticism and opposition in recent years. Construction of dams and regulation of rivers interrupt natural drainage, leading to poor sediment flow and excessive sedimentation at the reservoir’s bottom, leading to rockier stream beds and poorer conditions for river marine life.
How does water become a renewable resource?
Rain turns water into a sustainable resource and occurs as a result of transpiration. As a result, there will be more afforestation more transpiration, and more rain. When rain falls, it fills rivers, then evaporation occurs and the water heats up forming clouds which then rain down due to trees, and then all reservoirs are filled with water, and water is refreshed again.
What do you understand by water scarcity and what are its main reasons?
The shortage of adequate usable water supplies to meet the demands of water use within an area is known as water scarcity. Climate change can result in water shortages due to changes in weather patterns, such as droughts or floods, increased emissions, and increased human demand, and overuse of water.
Commercialization of agriculture: After the success of the revolution our farmers are producing commercial crops. The requirement of water and other sources is more for commercial crops.
In Rajasthan’s semi-arid regions, how is rainwater harvesting done?
Rainwater harvesting is done in Rajasthan’s semi-arid regions in the following ways: ‘Khadins’ was designed in Jaisalmer to store rainwater. Khadin is a form of an embankment that keeps water from flowing away. For water storage, people in Rajasthan built underground tanks known as tankas. They were linked to the houses’ sloping roofs through a conduit; the rainwater that fell on the rooftops flew through the pipe and was collected in underground tanks. Almost every house in Rajasthan’s semi-arid and arid regions, especially in Bikaner, Phalodi, and Barmer, had underground tanks or tankas for storing drinkable water.
How are modern modifications of traditional rainwater collection systems used to preserve and store water?
In India, traditional rainwater harvesting methods such as “the rooftop process” are gaining popularity. The rooftop rainwater harvesting system has been adopted by 200 households in Gendathur, Mysore, resulting in a village rich in rainwater. The state of Tamil Nadu has made rooftop rainwater harvesting systems mandatory for all homes. Defaulters face harsh penalties.
Rainfall harvesting is the collection and storage of rainwater rather than allowing it to run off the waste. Rainwater is collected from a roof-like surface and directed to a tank, cistern, deep pit, aquifer, or reservoir with percolation, where it seeps down and replenishes the groundwater supply.
Importance of rainwater harvesting:
• Rainwater harvesting is becoming increasingly important as the need for water rises..
• Rainwater collection relieves stress on limited water supplies.
• It is a reasonable source of the water system.
• It helps in recharging groundwater.
• The rainwater store is an extremely reliable source of drink when all other sources are dried up.
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