CBSE 2023 · Region 2 · Set 1 · Q35

Read the given source and answer the questions that follow : Most of the objections to the projects arose due to their failure to achieve the purposes for which they were built. Ironically, the dams that were constructed to control the 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. You may have seen or read how the release of water from the dams during heavy rains aggravated the flood situation in Maharashtra and Gujarat in 2006. The floods have not only devastated life and property but also caused extensive soil erosion. Sedimentation also meant that the flood plains were deprived of silt, a natural fertiliser, further adding on to the problem of land degradation. It was also observed that the multi-purpose projects induced earthquakes, caused water-borne diseases and pests and pollution resulting from excessive use of water. ($\displaystyle 35.1$) Name the movement against the river project in Gujarat. ($\displaystyle 35.2$) How have the big dams mostly been unsuccessful in controlling floods at the time of excessive rainfall ? ($\displaystyle 35.3$) Analyse any two merits of multi-purpose river projects.