For a flood control reservoirs, the effective storage is equal to ___________________?
Correct answer: D. Useful storage + surcharge storage -valley storage
- A. Useful storage - valley storage
- B. Useful storage + surcharge storage
- C. Useful storage + surcharge storage
- D. Useful storage + surcharge storage -valley storage
Explanation
For flood-control storage, effective storage is obtained by adding useful and surcharge storage and excluding the valley storage already present in the reservoir site. Thus the expression is useful storage plus surcharge storage minus valley storage.
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