River

Average annually inflow

Average annual water reduction

Annual percentage reduction %

m³∙sec⁻¹

km³

m³∙sec⁻¹

km³

Tigris

Turkey

572

18.04

1.448

0.04566

0.253

Tributaries from Iraq and Iran

867.46

27.36

2.787

0.0879

0.3213

Total

1439.82

45.4

4.235

0.1335

0.294

Euphrates

802

25.52

7.777

0.245

0.960

Total

2241.81

70.92

12.012

0.3785

1.254