Question

Given below are two statements:
Statement (I): Record from the tipping bucket gives data on the rainfall intensity.
Statement (II): Natural siphon-type recording raingauge gives a plot of the mass curve of rainfall.
In light of the above statements, choose the most appropriate answer from the options given below.

• A. Both Statement (I) and Statement (II) are correct.
• B. Both Statement (I) and Statement (II) are incorrect.
• C. Statement (I) is correct but Statement (II) is incorrect.
• D. Statement (I) is incorrect but Statement (II) is correct.

Hint:

- Tipping Bucket = Best for digital rainfall intensity.
- Natural Siphon / Float Type = Traces the cumulative mass curve of rainfall.
Both statements are standard facts in hydrology.

Answer 1

The Correct Option is A

Step 1: Understanding the Concept:
Recording (automatic) rain gauges continuously record precipitation data over time, unlike non-recording manual gauges.

Step 3: Detailed Explanation:
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Statement I evaluation: A tipping bucket rain gauge uses two balanced buckets. When one bucket fills with a calibrated depth (e.g., \(0.25 \text{ mm}\)), it tips, closing an electrical circuit. By recording the frequency of these tips, we directly obtain high-resolution rainfall intensity data. Thus, Statement I is correct.
-

Statement II evaluation: A natural siphon-type (float-type) rain gauge collects water in a chamber containing a float. A pen attached to the float draws a continuous line on a moving chart drum. This line represents the cumulative rainfall depth over time, which is the definition of a rainfall mass curve. Thus, Statement II is correct.

Step 4: Final Answer:
Both Statement (I) and Statement (II) are correct.