4
Match List-I with List-II:
Choose the correct answer from the options given below:
|
List - I
सूची - I
Structure Type
List-I (Structure Type
|
List - II
सूची - II
Design Return Period in Years
List-II (Design Return Period in Years
|
||
|---|---|---|---|
| A | Earth dams having natural spillways Earth dams having natural spillways | I | 25 25 |
| B | Stock water dams Stock water dams | II | 25 - 50 25 - 50 |
| C | Terrace outlets and vegetated waterways Terrace outlets and vegetated waterways | III | 15 15 |
| D | Field diversions Field diversions | IV | 10 10 |
EXPLANATION
Data Logging & Virtual Instrumentation
- Design Frequencies for Soil Conservation Structures:
- Earth dams having natural spillways $\to$ (II) 25 - 50 years: Built for permanent gully control and flood prevention where failure could cause moderate damage.
- Stock water dams $\to$ (I) 25 years: Designed to retain runoff for livestock drinking water with emergency spillways rated for 25-year storms.
- Terrace outlets and vegetated waterways $\to$ (IV) 10 years: Standard grassed waterways and terrace channels are designed for a 10-year recurrence interval storm without scouring.
- Field diversions $\to$ (III) 15 years: Diversion ridges/ditches carrying runoff away from gullies or fields use a 15-year design frequency.
- Matching Result: (A) - (II), (B) - (I), (C) - (IV), (D) - (III) (Option 4).
Correct option: (4) (A) - (II), (B) - (1), (C) - (V), (D) - (tll)
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