What is weighing rain gauge?
A recording rain gauge in which the weight of water collected is measured as a function of time and converted to rainfall depth. Weighing gauges with continuous output can be used for determining rainfall rate and depth. See Fisher & Porter rain gauge, universal rain gauge.
How is rain gauge calculated?
Here’s what you’ll need to do:
- Measure the diameter of the bucket at the level of the rain.
- Measure the diameter of the bucket at the bottom in the same way.
- Calculate the average of the two diameters.
- Divide by two to find the average radius.
- Find the average volume of rain = Depth x radius x radius x 3.14.
How does a weighing rain gauge work?
A rain gauge is really just a cylinder that catches rain. If an inch collects in the cylinder, it means an inch of rain has fallen. 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.
What are the types of rain gauges?
There are mainly 5 types of rain gauges:
- Graduated Cylinder Rain Gauge (Standard Rain Gauge)
- Tipping Bucket Rain Gauge.
- Weighing Precipitation Gauge.
- Optical Rain Gauge.
- Acoustic Rain Gauge.
Why rainfall is measured in cm?
But more importantly, why does a unit of length measure something like rainfall? The short answer is rain gauge. So when you see a rainfall reading in millimetres or centimetres, it is simply the height to which the collected water rose in the funnel of the rain gauge.
Which type of rain gauge is used in India?
The Symons rain gauge (also adopted by the Indian Meteorological Department) is a common non- recording type of rain gauge. ADVERTISEMENTS: This consists of a cylindrical vessel of 12.7 cm (5 inches) in diameter with a suitable base. On the top, a funnel of exactly 12.7 cm internal diameter is inserted.
What size is a rain gauge?
The standard United States National Weather Service rain gauge, developed at the start of the 20th century, consists of an 8-inch diameter (203 mm) funnel emptying into a graduated cylinder, 2.525 inches (64.1 mm) in diameter, which fits inside a larger container that is 8 inches in diameter and 20 inches (508 mm) tall …
How wide should a rain gauge be?
A wider diameter usually leads to more accurate readings. A 4-inch rain gauge is appropriate for most uses, while 8 inches is what the National Oceanic and Atmospheric Administration employs for its data. To avoid evaporation before the water level can be measured, UV protection is another factor to consider.
What is the accuracy of a rain gauge?
Accurate measurement: precipitation accuracy within 0.004 inches with accumulation and intensity readings and filter algorithms to compensate for wind, temperature, and evaporation Virtually maintenance-free operation: lifetime factory calibration, drift-free measurements, and robust protective housing eliminate field visits for instrument service
How are siphon rain gauges used to measure precipitation?
6.2.2 Siphon Rain Gauges A siphon rain gauge enables automatic, continuous measurement and recording of precipitation. (1) Structure and Operation This type of rain gauge consists of a receptacle (Figure 6.5) to collect precipitation and a measuring part (Figure 6.6) to measure and record its amount.
How does the Ott pluvio² rain gauge work?
The OTT Pluvio² is an all-weather precipitation gauge that uses superior weight-based technology to measure the amount and intensity of rain, snow, and hail.
Can a rain gauge be used to measure snow?
As this type of rain gauge can also be used to measure snow, it is alternatively known as a cylindrical rain/snow gauge. It consists of a cylindrical vessel with a uniform diameter from top to bottom and an orifice at the top.