No. of station(s) to be eliminated

Optimal station(s) combination that can be eliminated

Interpol. method

RMSE

r²

MAPE

NSE

ACFT

1

11

IDW

3.224

0.953

4.041

0.944

0.960

2

11, 15

IDW

3.811

0.925

5.153

0.919

0.973

3

4, 11, 15

UK

3.964

0.913

7.991

0.901

1.003

4

4, 11, 12, 15

UK

4.588

0.911

15.699

0.884

1.099

5

4, 5, 11, 15, 16

IDW

5.495

0.862

22.805

0.844

1.095

6

4, 8, 11, 12, 13, 15

UK

6.113

0.831

25.322

0.821

1.015

7

4, 5, 8, 11, 12, 15, 16

IDW

6.488

0.832

36.469

0.809

1.081

8

4, 5, 6, 8, 11, 12, 15, 16

IDW

7.018

0.817

49.610

0.775

1.138