Correct option is A
The correct answer is (a).
While the overall topological relief is important for creating a water head, absolute altitude (height above mean sea level) is not a primary or necessary criteria for selecting a hydroelectric site.
Hydropower fundamentally depends on the volume of water flow and the relative hydraulic head (drop in elevation), which can be achieved effectively even at lower absolute altitudes.
Information Booster
- The kinetic energy harnessed in a hydropower plant is directly proportional to both the discharge rate (Q) and the hydraulic head (H).
- Hydraulic head refers strictly to the localized vertical drop between the intake reservoir surface and the turbine blades, completely irrespective of the site's elevation above sea level.
- Run-of-the-river hydropower plants heavily rely on continuous natural river flow dynamics rather than massive high-altitude dam constructions.
- Geological stability is absolutely critical; massive reservoirs exert immense hydrostatic pressure, requiring inherently strong, unyielding bedrock to prevent catastrophic dam failures.
- Environmental impact assessments must evaluate siltation rates, seismic fault lines, and the severe ecological disruptions caused by inundating large upstream tracts of land.
- Hydropower represents one of the most reliable and highly dispatchable forms of renewable baseload energy currently available globally.
- Even small variations in the hydrological cycle due to climate change drastically affect the long-term energy generation viability of these plants.
- Option B: Water availability is the absolute most indispensable factor; a reliable, year-round river discharge is required to continuously spin the turbines for baseline generation.
- Option C: Rocky land is a strict prerequisite because the underlying geology must securely bear the tremendous structural weight of the massive concrete dam and resist continuous water seepage.
- Option D: A huge catchment area ensures that massive volumes of precipitation are naturally funneled into the dam's reservoir, directly guaranteeing sufficient water volume during critical dry seasons.
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10 Questions
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