Question

Arrange the following components of hydrograph in sequence:
A. Base flow
B. Rainfall occurrence
C. Rising limb
D. Recession limb
E. Crest segment
Choose the correct answer from the options given below:

• A. A, B, D, C, E
• B. A, C, E, B, D
• C. B, A, D, C, E
• D. B, C, E, D, A

Hint:

Hydrograph components in order:
Rainfall $\rightarrow$ Rising limb $\rightarrow$ Crest $\rightarrow$ Recession limb $\rightarrow$ Base flow.
Use the mnemonic: "Rain Creates Big Rivers Daily" (Rainfall, Crest, Rising limb, Recession limb, Direct runoff/Baseflow).

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
This question tests knowledge of the sequence of components of a storm hydrograph.
A hydrograph is a graph showing the discharge of a river versus time.

Step 2: Detailed Explanation:
The correct chronological sequence of a hydrograph is:
Rainfall occurrence (B): The event that triggers the hydrograph.
Rising limb (C): The ascending portion of the hydrograph as runoff increases.
Crest segment (E): The peak flow portion of the hydrograph.
Recession limb (D): The descending portion of the hydrograph as runoff decreases.
Base flow (A): The sustained, low flow portion before and after the storm.
Thus, the correct sequence is B, C, E, D, A.

Step 3: Final Answer:
Thus, the correct sequence is B, C, E, D, A, which corresponds to option (D).
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