Question

Show with relevant examples that multipurpose river valley projects are developed all over the world to utilise the

water. "Although large dams are useful yet they cause ecological problems". Explain.



(plz help me plz) ​

Answer 1

★ Answer ★

Examples of multipurpose river valley projects developed around the world include the Aswan High Dam in Egypt, the Grand Coulee Dam in Washington State, USA, the Three Gorges Dam in China, and the Itaipu Dam on the border of Brazil and Paraguay. These dams provide benefits such as irrigation, flood prevention, and hydroelectric power generation.

However, large dams can cause ecological problems due to the disruption of the natural flow of rivers and streams. For example, the Grand Coulee Dam has caused a decline in the salmon population due to the disruption of spawning areas. The Three Gorges Dam has caused an increase in water pollution due to the disruption of the natural flow of the river and the resulting accumulation of pollutants in the reservoir. Furthermore, large dams can cause sediment buildup upstream, resulting in difficulty for fish and other aquatic species to migrate. The disruption of the natural flow of the river can also impact the habitats of aquatic species and cause a decline in biodiversity.

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CreativeAB