we hear in T.V and Radio that the rain fall in particular is so many c.metres / m.ms, ? is it measured? Pl.?

Question

we hear in Television and Radio that the rainfall in a prticular area is so many centimetres / millimetres . How is this measured.

Answer 1

Weather stations are set up all over the globe. These may be as simple as a rain gauge that a qualified person checks each day and then phones or emails the results into a central data network (the weather bearue). On the other end of the spectrum is a fully automated rain gauge. This system has a funnel that collects the rain water and channels it into a central tube at a controlled rate. this then fills a small cup on a pivot bar to the point where it tips pouring the water into a collection drum and diverting the rain water to the cup on the other side. Since the volume of the cups are known (about 2 millilitres for low rainfall areas) the number of times the pivot bar tips from side to the other can be used to figure out the volume of rainfall. The information is then stored on a type of computer and downloaded into the central data network. Hope this helps.

Answer 2

mr. ramachandrula , rainfall is certainly measured .... it is measured in a few selected open places where no trees , buildings , etc., obstruct the downpour. these places r called catchments. a device (im afraid i dont know its name) that consists of a funnel and a container is placed in these catchments. this container is calibrated in mm in height.it is around 150-200mm deep & some ____mm wide it. hope u got the required reply......

Answer 3

To measure the rain fall you should have a vessel. it should be such that the shape,area,and measurements of the base should be exately equal with that of its openning,& its sides parallel to each other at right angles with the base ,such as a perfect cylender/cuboid/cube...etc with a openning at one side.While raining place such a vessel such that rain water will fall into that.and place its base exatlly parallel to the surface of the earth.After it rained you measure the hight of the water level in that vessal it will give you reading of the rain fall at that place.