Civil Engineering > GATE 2025 SET-1 > Rainfall Measurement
The mean rainfall over a catchment has to be estimated. The data for four rain gauges located in and around the catchment is listed in the table. Which one of the following statements is correct:
Rain gauge stationPQRS
Whether located inside the catchmentYesNoYesYes
Thiessen weightage factor0.100.500.250.15
Rainfall (mm)110100100125
A
The estimate obtained from the Thiessen-mean method is greater than that obtained using the arithmetic-mean method
B
The estimate obtained from the Thiessen-mean method is equal to that obtained using the arithmetic-mean method
C
The estimate obtained from the Thiessen-mean method is less than that obtained using the arithmetic-mean method
D
The Thiessen-mean method cannot be applied in this case

Correct : a

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