Question

Which of the following is a non-recording raingauge?

• A. Symon's raingauge
• B. Tipping bucket type raingauge
• C. Weighing type raingauge
• D. Floating type raingauge

Answer 1

The correct option is A Symon's raingauge

The various type of precipitation gauge used are classified as

(a) Non-recording gauge

(b) Recording gauge

(a) Non-recording gauge

$\Rightarrow \text{The non recording gauge extensively used in India is the symon's gauge.}$

$\Rightarrow \text{For uniformity, the rainfall is measured every day at 8:30 am (IST) and is recorded as the rainfall of that day.}$

(b) Recording gauge

The recording gauges produce a continuous plot of rainfall against time and provide valuable short duration data on intensity and duration of rainfall for hydrological analysis of storms. The commonly used recording gauge are :

(i) Tipping bucket type :

$\Rightarrow \text{The record from the tipping bucket gives data on the intensity of rainfall.}$

$\Rightarrow \text{The main advantage of this type of instrument is that it gives an electronic pulse output that can be recorded at a distance from the raingauge.}$

(ii) Weighing-bucket type :

$\Rightarrow \text{The catch from the funnel empties into a bucket mounted on a weighing scale. The weight of the bucket and its contents are recorded on a clockwise- driven chart.}$

$\Rightarrow \text{This instrument gives a plot of the accumulated rainfall against the elapsed time, i.e. mass curve of rainfall (accumulated precipitation against time).}$

Note: The weighing type is suitable for measuring all kinds of precipitation (rain, sleet etc.)

(iii) Natural syphon type:

$\Rightarrow \text{This type of recording rain-gauge is also known as float type gauge.}$

$\Rightarrow \text{Here the rainfall collected by a funnel shaped collector is led into a float chamber causing a float to rise.}$

$\Rightarrow \text{As the float rises, a pen attached to the float through a lover system records the elevation of the float on a rotating drum driven by a clockwork mechanism.}$

Note: This type of rain gauge is adopted as standard recording type rain gauge in India.