Question

The normal annual rainfall of the stations A, B, C and D in a basin are 75, 80, 96 and 72 cm, respectively. In the year 2020, the station A was inoperative and th stations B, C and D recorded annual precipitations of 70, 72 and 63 cm, respectively. Estimate the rainfall at station A in that year.

• A. 50 cm
• B. 55 cm
• C. 60 cm
• D. 62.5 cm

Hint:

- If the difference in normal precipitation is \(< 10%\), use the simple Arithmetic Average Method.
- If the difference is \(> 10%\), always use the weighted Normal Ratio Method.

Answer 1

The Correct Option is D