MP Board · Class 10 · Social Science · Geography: Water ResourcesExplain the multi-purpose river projects and their advantages and disadvantages. Why are they called the 'temples of modern India'? Discuss in detail.

Introduction to Multi-purpose River Projects\nMulti-purpose river projects are large-scale dams and reservoirs constructed across rivers to serve various objectives simultaneously, such as irrigation, electricity generation, flood control, water supply for domestic and industrial uses, inland navigation, and recreation. Jawaharlal Nehru proudly proclaimed dams as the 'temples of modern India' because they would integrate development in agriculture and the village economy with rapid industrialization and urban economy.

Advantages of Multi-purpose Projects

• Irrigation: These projects provide perennial water supply to large tracts of agricultural land, helping in boosting food grain production and ensuring food security.
• Hydroelectric Power Generation: Dams generate clean and renewable hydroelectricity, which is crucial for powering domestic households, agricultural pump sets, and expanding industrial sectors.
• Flood Control: Reservoirs store excess rainwater during heavy monsoons, regulating downstream river flows and significantly reducing catastrophic floods that destroy life and property.
• Water Supply: They ensure a reliable and regulated supply of drinking water to rapidly growing urban centers and raw water to various industries.
• Inland Navigation and Tourism: Large reservoirs often develop into navigable waterways and popular recreational spots, promoting local tourism, fisheries, and economic growth.

Disadvantages and Criticisms of Multi-purpose Projects

• Displacement of Local Communities: Construction of massive dams forces the displacement of thousands of tribal people, farmers, and local villagers from their ancestral lands and habitats without adequate rehabilitation in many cases.
• Environmental Degradation: Impounding rivers alters natural flow patterns, causing severe fragmentation of aquatic habitats, blocking fish migration routes, and submerging vast areas of forests and fertile soil.
• Seismicity and Induced Earthquakes: Large reservoirs exert immense water pressure on the earth's crust, which has been known to trigger localized earthquakes and seismic activity.
• Water-borne Diseases and Salinization: Poor water management often leads to waterlogging, soil salinization, and the spread of vector-borne diseases like malaria and schistosomiasis around irrigation canals.
• Interstate Water Disputes: Sharing river water among neighboring states frequently triggers political tensions, legal battles, and interstate disputes over equitable distribution.