How is rainfall measured?

Rainfall is measured by calculating the amount of rain that falls over a specific period of time and area. This is typically done using a device called a rain gauge, which collects and quantifies the precipitation that falls into it. The collected amount is often expressed in millimeters or inches, indicating how much water has been deposited on a flat surface.

This method provides direct and accurate data regarding the total precipitation, making it essential for various applications, including agriculture, meteorology, and hydrology. Other methods, such as assessing soil moisture, temperature changes, or evaporation rates, do not directly measure rainfall but may provide indirect insights into moisture availability and climate patterns.