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Rainfall Measurement Techniques
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Capacitance Rain Gauge
Operates by measuring the change in capacitance within a tube due to the increased water level from the accumulated rainfall.
Standard Rain Gauge
An open-ended canister collects rainfall, which is then measured using a ruler for the depth of the water.
Totalizer Rain Gauge
A rain gauge designed to accumulate precipitation over an extended period without needing to be emptied, often used in remote or unattended locations.
Pluviometer
General term used to describe any instrument that measures the quantity of precipitation over a period of time, usually equivalent to a standard rain gauge.
Weighing Rain Gauge
Measures precipitation by collecting it in a container that sits on a scale, recording the weight of the water to determine rainfall amount.
Tipping Bucket Rain Gauge
Rainfall is captured in a funnel leading to a teeter-totter-like container that tips and dumps water each time a set amount is collected, with each tip being recorded.
Disdrometer
Measures the number and size of raindrops by capturing and analyzing them, providing detailed information on rainfall intensity and drop size distribution.
Acoustic Rain Gauge
Detects sound waves made by raindrops hitting the water surface; these sound waves are analyzed to measure rainfall intensity and drop size distribution.
Optical Rain Gauge
Utilizes a beam of light that is interrupted by falling raindrops; the amount of light blocked correlates with rainfall rate.
Automated Rain Gauge
Equipped with electronic sensors that automatically record the amount of rainfall, often capable of remote data transmission for real-time monitoring.
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