Where should rain gauges be placed to avoid evaporation and splash?

Where should rain gauges be placed to avoid evaporation and splash?

• A. On Grass
• B. On Concrete
• C. In the Open Field
• D. Under a Roof

Answer: (A)

The idea is to minimize water loss from the collected rainfall and stop extra water from splashing into the gauge. Placing the gauge on grass provides a cooler, more natural surface that reduces evaporation of the water inside the gauge compared with a hot, hard surface like concrete. Grass also helps dampen splashes from nearby surfaces and ground, reducing extra water entering the funnel. A roof would block rainfall and bias the measurement, while concrete can heat up and promote evaporation or splash. Open field setups can work, but grass is the best option among these choices for keeping the reading accurate.

The idea is to minimize water loss from the collected rainfall and stop extra water from splashing into the gauge. Placing the gauge on grass provides a cooler, more natural surface that reduces evaporation of the water inside the gauge compared with a hot, hard surface like concrete. Grass also helps dampen splashes from nearby surfaces and ground, reducing extra water entering the funnel. A roof would block rainfall and bias the measurement, while concrete can heat up and promote evaporation or splash. Open field setups can work, but grass is the best option among these choices for keeping the reading accurate.