Plains Like Chindwin Plain

Sittang Plain

Plain

4.60 Poor

Salween Plain

Plain

4.60 Poor

Chao Phraya Plain

Plain

6.92 Fair

Brahmaputra Plain

Plain

6.88 Fair

Central Plain of Thailand

Plain

6.72 Fair

Irrawaddy Delta

Plain

6.70 Fair

Orinoco Plains

Plain

6.67 Fair

Mekong Plain (Cambodia)

Plain

6.42 Fair

Kura-Araks Lowland

Plain

5.98 Mediocre

Amu Darya Plain

Plain

5.96 Mediocre

Syr Darya Plain

Plain

5.78 Mediocre

Tone Plain

Plain

5.35 Mediocre

Savé Valley

Plain

5.34 Mediocre

Volta Basin

Plain

5.29 Mediocre

Lena River Plain

Plain

5.29 Mediocre

Ussuri Plain

Plain

5.08 Mediocre

Benue Trough

Plain

4.88 Poor

Irtysh Plain

Plain

4.42 Poor

Tobol River Plain

Plain

4.14 Poor

Amazon Basin

Plain

8.79 Great

Ganges Plain

Plain

8.60 Great

North China Plain

Plain

8.39 Great

Ganga-Yamuna Doab

Plain

8.10 Great

Mekong Delta

Plain

7.87 Good