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Rainfall Measurement Techniques

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Capacitance Rain Gauge

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Operates by measuring the change in capacitance within a tube due to the increased water level from the accumulated rainfall.

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Standard Rain Gauge

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An open-ended canister collects rainfall, which is then measured using a ruler for the depth of the water.

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Totalizer Rain Gauge

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A rain gauge designed to accumulate precipitation over an extended period without needing to be emptied, often used in remote or unattended locations.

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Pluviometer

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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.

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Weighing Rain Gauge

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Measures precipitation by collecting it in a container that sits on a scale, recording the weight of the water to determine rainfall amount.

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Tipping Bucket Rain Gauge

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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.

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Disdrometer

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Measures the number and size of raindrops by capturing and analyzing them, providing detailed information on rainfall intensity and drop size distribution.

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Acoustic Rain Gauge

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Detects sound waves made by raindrops hitting the water surface; these sound waves are analyzed to measure rainfall intensity and drop size distribution.

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Optical Rain Gauge

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Utilizes a beam of light that is interrupted by falling raindrops; the amount of light blocked correlates with rainfall rate.

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Automated Rain Gauge

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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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