The standard height of a standard rain gauge is

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APSC JE Civil 14 Jul 2024 Official Paper
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  1. 10 cm
  2. 20 cm
  3. 30 cm
  4. 50 cm

Answer (Detailed Solution Below)

Option 3 : 30 cm
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Explanation:

The Standard Height of a Standard Rain Gauge

A rain gauge is a meteorological instrument used to measure the amount of precipitation in a specific area over a period of time. The height of a standard rain gauge is designed to ensure accurate and consistent measurements while minimizing interference from environmental factors such as wind and splashing.

  • Standard Design: The rain gauge is typically cylindrical in shape and mounted at a specific height above the ground to avoid obstructions and ensure accurate readings.

  • Height Requirement: The standard height for installing a rain gauge is 30 cm above the ground. This is determined to minimize the impact of wind and splashing rain while maintaining accessibility for measurement.

  • Calibration and Accuracy: The height is standardized internationally to ensure consistency in rainfall data collection across different regions.

Analyzing the Given Options

  1. Option 1: 10 cm (Incorrect)

    • A height of 10 cm is too low and may result in inaccurate measurements due to rain splashing or obstructions from nearby objects.

  2. Option 2: 20 cm (Incorrect)

    • A height of 20 cm is still lower than the standard requirement and may lead to inaccurate readings due to interference from environmental factors.

  3. Option 3: 30 cm (Correct)

    • The standard height of a rain gauge is 30 cm above the ground. This height ensures accurate and consistent measurements while minimizing the impact of environmental factors.

  4. Option 4: 50 cm (Incorrect)

    • A height of 50 cm is higher than the standard, which might affect the accessibility of the gauge and lead to inconsistencies in data collection.

Conclusion: The correct answer is Option 3: 30 cm.

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