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Question
Match List-I (Floods) with List-II (Parameters) and select the correct answer using the codes given below the lists:

List-I

List-II

A.  Standard project flood (SPF)

1. Includes catastrophic floods

B.  Maximum probable  flood (MPF)

2. Includes floods of severe conditions

C.  Design flood

3. Peak flow obtained from observed data

D.  Maximum flood

4. Flood of desired recurrence interval
A.
Codes:
A    B    C    D
2    1    4     3
B.
1    2    3    4
C.
2    1    3    4
D.
1    2    4    3
Answer ( Option A)

Codes:
A    B    C    D
2    1    4     3

Solution

(i) Standard project flood (SPF): This is the estimate of the flood likely to occur from the most severe combination of the meterological and hydrological conditions, which are reasonably characteristic of the drainage basin being considered, but excluding extremely rare combination.
(ii) Maximum probable flood (MPF): This differs from the SPF in that it includes the extremely rare and catastrophic floods and is usually confined to spillway design of very high dams. The SPF is usually around 80% of the MPF for the basin.
(iii) Design flood: It is the flood adopted for the design of hydraulic structure like spillways, the MPF or SPF or a flood of any desired recurrence interval depending upon the degree of flood protection to be offered and cost economics of construction of structures.
(iv) Maximum flood: Correspond to peak flow obtained from observed data.

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