No. of station(s) to be eliminated

Optimal station(s) combination that can be eliminated

Interpol. method

RMSE

r²

MAPE

NSE

ACFT

1

1

UK

2.155

0.323

2.155

−1.507

0.983

2

1, 4

IDW

3.991

0.446

5.925

0.421

1.029

3

1, 4, 13

UK

4.599

0.375

10.792

0.355

1.042

4

1, 4, 6, 13

IDW

4.737

0.268

15.562

0.167

1.063

5

1, 4, 6, 13, 15

IDW

5.124

0.582

25.187

0.428

1.140

6

1, 4, 6, 11, 13, 15

IDW

6.258

0.642

43.558

0.284

1.248

7

1, 4, 6, 7, 11, 13, 15

UK

7.579

0.469

60.337

0.038

1.278

8

1, 4, 6, 7, 9, 11, 13, 15

UK

9.962

0.301

69.931

0.100

1.279