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

5.999

0.865

3.792

0.848

1.020

2

3, 11

IDW

7.470

0.808

4.006

0.731

0.961

3

3, 5, 11

UK

9.084

0.619

6.591

0.599

0.984

4

3, 5, 7, 11

UK

10.766

0.439

12.184

0.430

1.025

5

3, 5, 7, 11, 14

IDW

11.521

0.461

15.621

0.459

1.022

6

3 , 5, 7, 11, 14, 16

UK

12.119

0.438

19.839

0.438

1.019

7

3 , 5, 6, 7, 11, 14, 16

IDW

14.834

0.395

23.148

0.341

0.966

8

1, 3 , 5, 6, 7, 11, 14, 16

IDW

14.684

0.312

27.468

0.287

0.977