Simple Mean Method

Q. The normal annual rainfall at stations A, B and C are 170.6, 180.3 and 165.3 cm respectively. In 1987; station B was inoperative and stations A and C recorded annual precipitation of 153.0 and 145.1 cm respectively. The annual rainfall at B in that year could be estimated as

1. 160 cm
2. 149.05 cm
3. 140.58 cm
4. 156.8 cm

Q. For estimating the missing annual rainfall value at a raingauge station using simple mean method, its normal annual precipitation should not be having a variation of more than ___ from the normal annual precipitation of other raingauges

1. 5%
2. 8%
3. 10%
4. 14%

Q. Normal annual rainfall at three stations A, B and C are 168.3, 180.7 and 165.1 cm respectively. It is found that in the year 2000 stations B was inoperative. If the observed precipitations at stations A and C were 160.0 cm and 155.0 cm, the rainfall at station B in that year could be

1. 157.5 cm
2. 160.5 cm
3. 172.0 cm
4. 181.5 cm