What does a simple rain gauge consist of?

What does a simple rain gauge consist of?

It consists of a 127 mm diameter copper cylinder with a chamfered rim made of brass. Precipitation that falls on the rain gauge orifice drains through a funnel into a removable container from which the rain may be poured into a graduated glass measuring cylinder.

How much does a rain gauge cost?

The gauge should be installed 2-5 feet above the ground mounted on the side of a single post. The top of the rain gauge should extend several inches above the top of the mounting post. The mounting post should have a rounded, pointed, or slanted top to avoid upward splash towards the rain gauge.

How do you make a rain gauge out of a 2 liter bottle?

Divide by two to find the average radius. 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). Divide the rainfall volume by this area to get the rainfall.

What is an inch of rain?

An inch of rain is exactly that, water that is one inch deep. One inch of rainfall equals 4.7 gallons of water per square yard or 22,650 gallons of water per acre!

How is rain gauge calculated?

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.

How do you record rainfall?

The standard instrument for the measurement of rainfall is the 203mm (8 inch) rain gauge. This is essentially a circular funnel with a diameter of 203mm which collects the rain into a graduated and calibrated cylinder. The measuring cylinder can record up to 25mm of precipitation.

What does 10mm rain mean?

10 mm rainfall means that if rainfall fell on a flat land surface , with no slope ,no evaporation, and no percolation of water I.e. water does not go underground, then the amount of rainfall would be 10 mm measured from the ground. Now this is practically not possible ,so ideally rain gauge is used to measure rainfall.

Is my rain gauge accurate?

Although the kind that are given away free at farm shows are not usually 4-inch-diameter gauges, they are still relatively accurate. Accuracy of the manual rain gauges is, of course, user-dependent – as accurate as the person checking the gauge, recording the data, emptying it, and resetting it.

What are the different types of rain gauges?

The three major types of rain gauges are the standard gauge, tipping bucket gauge and weighing gauge.

Why do rain gauges have funnels?

When one fills up with water, it tips and spills out, and the other comes into place to do the collecting. These little funnels tip each time rainfall amounts to . 01 inches. The tip triggers a signal that is transmitted and recorded.

What does 3 inches of rain mean?

Well, if all the rain that falls stays right where it lands—meaning it doesn't run off and accumulate in streams and rivers and eventually in lakes and oceans, and it isn't absorbed into the ground—then 1 inch of rain in an area is enough to evenly cover the ground in that area with a layer of water 1 inch deep.

What is rain gauge and its uses?

The rain gauge is a meteorological instrument for measuring the amount of precipitation (especially rainfall amounts) fallen during a given time interval at a certain location. In short – the rain gauge are used to measure rainfall.

How do you label a rain gauge?

Take a ruler and place it against the tape so that the 0 lines up with the bottom line you have marked off. Use a marker to mark off every half-centimeter or half-inch along the tape until you get to the top. Label the centimetres or inches from the top to the bottom.