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Why can river health not be measured only by water quantity?

Answer and explanation

Correct answer: Because water quality, natural flow, biodiversity, and sediment transport also affect river health.

River health is a multi-dimensional concept. Along with sufficient water, it requires good water quality, a natural flow regime, aquatic biodiversity, and balanced sediment transport. A river may have plenty of water but still be polluted or have its natural flow disrupted by dams; therefore, option C is incorrect. Exam tip: mention water quality and ecosystem conditions along with water quantity when describing river health.

Related tags

River HealthWater QualityFlow RegimeAquatic BiodiversitySediment TransportDrainageRole Of RiversGeography

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