Question

Which of the following is a non-automatic rain gauge ?

• A. Syphon type rain gauge
• B. Symon's rain gauge
• C. Weighing bucket rain gauge
• D. Tipping bucket rain gauge

Hint:

The key difference is continuous recording.
- Automatic/Recording Gauges (Tipping Bucket, Weighing, Syphon) produce a graph of rainfall vs. time (a hyetograph).
- Non-Automatic Gauges (Symon's) only give the total rainfall depth over a period.

Answer 1

The Correct Option is B

Step 1: Understanding the Question:
Which rain gauge is non-automatic (needs manual reading)?

Step 2: Key Classification (Alternate):
Symon's gauge: standard non-recording, manual measurement daily. Tipping bucket, weighing, syphon/float types: automatic recording.

Step 3: Detailed Explanation:
Symon's gauge collects rain in bottle, observer measures with graduated cylinder every 24 hours. Recording gauges give continuous intensity-duration data. India standard non-recording gauge = Symon's (127mm diameter).

Step 4: Final Answer:
Symon's rain gauge.