Compare the advantages and disadvantages of multi-purpose river projects.
Answers
Answer:
Regulating and damming of rivers affect their natural flow causing poor sediment flow and excessive sedimentation at the bottom of the reservoir, resulting in rockier streambeds and poorer habitats for the rivers’ aquatic life. Dams also fragment rivers making it difficult for aquatic fauna to migrate, especially for spawning. It has great ecological consequences like salinisation of the soil. At the same time, it has transformed the social landscape i.e. increasing the social gap between the richer landowners and the landless poor. The dams that were constructed to control floods have triggered floods due to sedimentation in the reservoir. Moreover, the big dams have mostly been unsuccessful in controlling floods at the time of excessive rainfall. It was also observed that the multi-purpose projects induced earthquakes, caused waterborne diseases and pests and pollution resulting from excessive use of water.
Answer:
The various technological and institutional reforms consist of various measures taken by the Central and State governments from time to time. Flooding of fields with water is now being replaced by drip irrigation and the use of sprinklers. Chemical fertilizers are being used on a large scale, to increase the farm yields. Bio- fertilisers are now supplementing them. High yielding and early maturing quality seeds have been developed. Most of these technology inputs gave birth to Green Revolution in sixties and seventies of twentieth century. White Revolution followed the Green Revolution.
Explanation: