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A hydrometric curve is a plot of?

  • A.Time of concentration and elevation curve of catchment
  • B.Area elevation curve
  • C.Spot rainfall values and isohyets on a basin app
  • D.Depth of rainfall & elevation of a catchment

Answer: B

The plot described is the area elevation curve.

The curve that shows how the area of a catchment is distributed with elevation, the area lying above (or below) each elevation plotted against that elevation, is the hypsometric curve, also called the area-elevation curve. The paper prints the name as 'hydrometric', in both its English and Hindi text, but the plot it describes is this one. It is used to describe the relief of a watershed and its stage of geomorphic development.

Rainfall values and isohyets on a basin map make an isohyetal map. Time of concentration and depth of rainfall against elevation are not what this curve plots.

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