31. mention any two problems caused by the construction of huge dams ?
Answers
Explanation:
Big dams flood people out of their homes and off their lands; wipe out endangered habitats and species; spread water-borne diseases; deprive flood plains of the water and sediments of life-giving floods (while increasing the damage floods cause to people); ruin beautiful landscapes and submerge places of great cultural or spiritual importance. And that’s just a partial charge sheet.
Big dams even cause earthquakes (because of the weight of water in reservoirs), release greenhouse gases (because of the rotting of flooded vegetation), destroy marine fisheries (because they disrupt river-borne flows of freshwater and nutrients into oceans) and lead to coastal erosion (because the sediments that eventually fill reservoirs would previously have flowed out through estuaries and then been washed back by waves to protect the shoreline). Occasionally, they collapse and drown people. In the world’s worst dam disaster – a mega-catastrophe that struck central China in 1975 when two large dams burst – as many as 230,000 people died.
Explanation:
Problems in construction of large dams are: They wipe out flora and fauna species. Flooding of huge area around it takes place, which causes destruction of wetlands, forests, farmland and displacement of whole settlement. There are also chances of increase in earthquake or natural disaster.
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