Rain gauge - Wikipedia
A rain gauge (also known as udometer, pluviometer, ombrometer, and hyetometer) is an instrument used by meteorologists and hydrologists to gather and measure the amount of liquid precipitation in a predefined area, over a set period of time. [1]
How is rainfall measured? | What does 1 mm rainfall mean?
The rainfall is measured every 24 hours, generally at 8.30 in the morning. The gauge must be fastened and should be placed away from any structure. The top of the rain gauge must be at least 0.3 metres above the ground level.
Measuring rainfall – it’s easy and difficult at the same time
Find the average volume of rain = Depth x radius x radius x 3.14. Find the area at the top of the bucket (this is the area over which the rain is collected). Measure the diameter; Divide the diameter by 2 to get the radius; Area = radius x radius x 3.14; Divide the rainfall volume by this area to get the rainfall.
How Is Rainfall Measured? - Scientific American
2015年4月8日 · How is rainfall measured? What does it mean when it rains an inch? And how many gallons of water fall on your roof in a storm?
Reading a Rain Gauge | Precipitation Education
Rain gauges are the most common tool for measuring rain, but how do they actually work? What are some other ways we measure precipitation? Reading a rain gauge is simple. We can look at the measurement marks on the side of a rain-capturing device, and find the level of water collected from a passing storm.
How Do We Measure Rainfall? - Frontiers for Young Minds
2018年8月14日 · In this paper, you will learn the functioning of three rainfall measurement devices providing cumulative rainfall depth (tipping bucket rain gauges), size and velocity of falling drops (disdrometers), or rainfall maps (weather radars).
How we measure rainfall - Met Office
Since the earliest years of weather records, the de facto standard for the measurement of daily rainfall has been the 0900 UTC reading made by an observer from a 5 inch storage rain-gauge. The...
How Does a Rain Gauge Measure Rainfall | The Weather Station
2019年4月27日 · Rain gauge helps us to track the rainfall and through the readings of this instrument the humidity, rate of precipitation can be predicted. Many of us might know about a rain gauge but what we don’t know it’s working procedure. Without any delay, let’s give an overview of the measurement and working procedure of the rain gauge.
Weather: Measuring the Rain - Infoplease
It's that simple. Most standard rain gauges have a wide funnel leading into the cylinder and are calibrated so that one-tenth of an inch of rain measures one inch when it collects inside. The funnel is 10 times the cross-sectional area of the tube. Rainfall as low as .01 inches can be measured with this instrument.
7.8: Precipitation Measurement - Geosciences LibreTexts
The simplest precipitation instrument is a rain gauge, which is a cylindrical bucket into which the rain falls. By using a measuring stick to manually read the water depth in the bucket at successive times such as every hour, you can determine rainfall rate.