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How does the size of a river basin give a useful signal in water management?

Answer and explanation

Correct answer: It indicates possible water availability and flood risk

A river basin is the area from which rainwater drains into the same river and its tributaries. A larger basin can generally collect runoff from a wider area, so its size helps in estimating water availability, planning storage, and assessing possible flood risk. The chemical composition of river water depends mainly on rocks, soil, and pollution, not simply on basin size. Exam tip: relate basin size to catchment area and the amount of runoff.

Related tags

River BasinDrainage SystemsWater ManagementFlood RiskCatchment AreaRunoffDrainage Systems In IndiaDrainage

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