Hydroelectric Power — Prelims Strategy

Prelims Strategy

For Prelims, focus on factual accuracy and conceptual clarity regarding hydroelectric power. Key areas to master include: types of hydroelectric plants (run-of-river, reservoir, pumped storage) and their distinguishing features; major hydroelectric projects India (Tehri, Sardar Sarovar, Bhakra Nangal, Koyna, Subansiri Lower) – their locations (river, state), capacities, and any unique characteristics; constitutional provisions (Article 262, Seventh Schedule entries on water and electricity) and their implications for inter-state disputes; key statutes like the Electricity Act 2003, Forest Conservation Act 1980, and Water (Prevention & Control of Pollution) Act 1974; basic principles of generation (potential to kinetic to electrical energy); and key concepts such as capacity factor, black start capability, and environmental flow.

Pay attention to recent developments, especially new policies on small hydro and pumped storage, and any significant project clearances. Questions often test the differences between various types of hydro plants or their environmental impacts.

Memorize approximate installed capacities and potential figures (e.g., 12% electricity from hydro, 148,700 MW potential [CEA 2024]). Practice MCQs that involve matching projects to rivers/states or identifying correct statements about hydro technology and policy.

Understanding the difference between small hydro large hydro power is also a recurring theme.