Question

The following is the non-recording type rain gauge:
• Float type rain gauge
• Symons rain gauge
• Weighing type rain gauge
• Tipping bucket rain gauge

• A. Float type rain gauge
• B. Symons rain gauge
• C. Weighing type rain gauge
• D. Tipping bucket rain gauge

Hint:

Remember the classification:
• Non-recording rain gauge: Symons rain gauge
• Recording rain gauges: Float type, Weighing type, Tipping bucket type A quick memory trick: \[ \text{“Symons Simply Stores Rainfall”} \] which reminds that it only stores total rainfall and does not record rainfall variation with time.

Answer 1

The Correct Option is B

Concept: Rain gauges are instruments used in hydrology and meteorology to measure the amount of rainfall occurring at a particular place over a given period of time. These instruments are broadly classified into two major categories:
• Non-recording rain gauges
• Recording rain gauges A non-recording rain gauge simply collects rainfall and indicates the total amount of rain received during a specific duration. It does not provide information regarding the intensity of rainfall or variation of rainfall with time. A recording rain gauge continuously records rainfall data automatically and provides information such as rainfall intensity, duration, and distribution with respect to time. The most commonly used non-recording rain gauge in India is the Symons rain gauge. The commonly used recording rain gauges are:
• Float type rain gauge
• Weighing bucket rain gauge
• Tipping bucket rain gauge Therefore, identification between recording and non-recording rain gauges is extremely important in hydrology and water resources engineering.

Step 1: Understanding non-recording rain gauges. A non-recording rain gauge measures only the total accumulated rainfall during a particular observation period. It does not create a continuous rainfall record automatically. The observer manually measures the collected rainfall using a graduated measuring cylinder. The most standard and widely accepted non-recording rain gauge is: \[ \boxed{\text{Symons rain gauge}} \]

Step 2: Analyzing each option carefully. Option (A): Float type rain gauge A float type rain gauge is a recording rain gauge. In this instrument, rainfall enters a chamber containing a float. As the water level rises, the float moves upward and records rainfall continuously on a chart. Hence, this is not a non-recording rain gauge. Therefore: \[ \boxed{\text{Option (A) is incorrect}} \] Option (B): Symons rain gauge Symons rain gauge is the standard non-recording rain gauge used extensively for ordinary rainfall measurements. It simply collects rainwater without automatically recording rainfall intensity versus time. Hence: \[ \boxed{\text{Option (B) is correct}} \] Option (C): Weighing type rain gauge A weighing bucket rain gauge continuously records the accumulated rainfall by measuring the increasing weight of collected rainwater. Since it automatically records rainfall data, it is classified as a recording rain gauge. Therefore: \[ \boxed{\text{Option (C) is incorrect}} \] Option (D): Tipping bucket rain gauge A tipping bucket rain gauge is also a recording type rain gauge. It records rainfall intensity automatically by counting bucket tips caused by collected rainfall. Hence: \[ \boxed{\text{Option (D) is incorrect}} \] Final Conclusion: Among all the given options, only the Symons rain gauge belongs to the category of non-recording rain gauges. Therefore: \[ \boxed{\text{Symons rain gauge}} \] Hence, the correct answer is: \[ \boxed{(B)\ \text{Symons rain gauge}} \]