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GATE 2025 AG – Question 26

Soil and Water Conservation Engineering · Hydrology · 1 mark · Multiple select

Match P Isopleth, Q Isobath, R Isohyet, S Isochrone, T Isobar with 1 Rainfall,2 Pressure,3 Evapotranspiration,4 Groundwater,5 Surface runoff.

  1. P–4,Q–3,R–1,S–5,T–2
  2. P–5,Q–4,R–1,S–3,T–2
  3. P–3,Q–4,R–1,S–5,T–2
  4. P–3,Q–4,R–2,S–5,T–1

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Correct answer: (C) P–3,Q–4,R–1,S–5,T–2

Explanation

An isohyet joins equal rainfall; an isobar equal pressure; an isobath equal depth, used for groundwater depth; and an isochrone equal travel time, used in runoff analysis. The remaining isopleth is the equal-value contour used here for evapotranspiration. Thus **P–3,Q–4,R–1,S–5,T–2,C**. Isopleth is a general contour term rather than a name exclusive to evapotranspiration.

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