Question:
Inconsistency of rainfall data can be checked by
Inconsistency of rainfall data can be checked by
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Remember:
• Double-mass curve $\rightarrow$ Checks consistency of rainfall records.
• Normal ratio method $\rightarrow$ Estimates missing rainfall data.
• DDF curve $\rightarrow$ Relates rainfall depth, duration, and frequency.
• Double-mass curve $\rightarrow$ Checks consistency of rainfall records.
• Normal ratio method $\rightarrow$ Estimates missing rainfall data.
• DDF curve $\rightarrow$ Relates rainfall depth, duration, and frequency.
Updated On: Jul 23, 2026
- Normal ratio method
- Mass curve method
- Double-mass curve method
- Depth-duration-frequency curve
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The Correct Option is C
Solution and Explanation
Concept:
The Double-Mass Curve Method is used to check the consistency of rainfall records at a station.
It compares the cumulative rainfall at the station under consideration with the cumulative average rainfall of surrounding stations.
A change in the slope of the double-mass curve indicates inconsistency in the recorded rainfall data.
Step 1: Understand the double-mass curve method. The cumulative rainfall of the station is plotted against the cumulative average rainfall of neighbouring stations. If the graph is a straight line, \[ \boxed{\text{Rainfall data are consistent}.} \] If the slope changes, \[ \boxed{\text{Rainfall data are inconsistent}.} \]
Step 2: Identify the correct method. Hence, the consistency of rainfall data is checked by the \[ \boxed{\text{Double-mass curve method}.} \] Therefore, the correct option is \[ \boxed{(C)\;\text{Double-mass curve method}.} \]
Step 1: Understand the double-mass curve method. The cumulative rainfall of the station is plotted against the cumulative average rainfall of neighbouring stations. If the graph is a straight line, \[ \boxed{\text{Rainfall data are consistent}.} \] If the slope changes, \[ \boxed{\text{Rainfall data are inconsistent}.} \]
Step 2: Identify the correct method. Hence, the consistency of rainfall data is checked by the \[ \boxed{\text{Double-mass curve method}.} \] Therefore, the correct option is \[ \boxed{(C)\;\text{Double-mass curve method}.} \]
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