Allied & ICAR Exam Bank • ALLIED_0396 MCQ • 1 Mark

Section 4: Soil and Water Conservation Engineering

Hydrology and Runoff

Subtopic: Hydrology and Runoff

Question Statement:

The Thiessen polygon method for calculating average rainfall over a catchment area assigns weights to individual raingauges based on:

Options:

  • (A) The fraction of catchment area closer to that gauge than to any other gauge
  • (B) The elevation of the raingauge station
  • (C) The arithmetic average of nearest three stations
  • (D) The distance between the gauge and catchment outlet

Answer Key:

A

Step-by-Step Solution & Explanation

Thiessen polygons are formed by perpendicular bisectors between adjacent stations, defining areas closest to each station.
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