Plains Like Helmand Basin

Dasht-e Margo

Plain

6.95 Fair

Indus Delta

Plain

7.85 Good

Amu Darya Delta

Plain

7.55 Good

Turan Plain

Plain

6.42 Fair

Bengal Delta

Plain

9.10 Excellent

Dasht-e Lut

Plain

8.85 Great

Rub' al Khali

Plain

8.80 Great

Thar Desert

Plain

8.45 Great

Manchurian Plain (Songhua-Liao Plain)

Plain

8.10 Great

Ob-Irtysh lowlands

Plain

8.05 Great

Eyre Basin (Lake Eyre Basin)

Plain

8.00 Great

An Nafud

Plain

7.85 Good

Qaidam Basin

Plain

7.70 Good

Dasht-e Kavir

Plain

7.70 Good

Caspian Depression

Plain

7.70 Good

Betpak-Dala Steppe

Steppe

7.52 Good

Helmand

River

7.33 Good

Makran Coastal Plain

Plain

6.95 Fair

Registan Desert

Desert

6.65 Fair

Kura-Araks Lowland

Plain

5.98 Mediocre

West Siberian Plain

Plain

5.20 Mediocre

Helmand River

River

5.01 Mediocre

Kolyma Lowland

Plain

4.12 Poor

Tigris-Euphrates Plain

Plain

9.25 Excellent