“Watershed Atlas of India” has been devised based on the drainage map on 1:1 million scale following STREAM hierarchy where the whole country has been divided into six RIVER Resource Regions, 35 Basins, 112 Catchments, 550 Sub-catchments and 3257 Watersheds.

The codification has been made in a simplistic manner following alphanumeric system.

A watershed can be symbolized as 1A2B3 where:

• “1” STANDS for River Resource Region
• “A” designates the Basin in that river resource region
• “2” indicates the Catchment within the basin
• “B” indicates Sub catchment
• “3” stands for the watershed number in the sequence of stream hierarchy

“Watershed Atlas of India” has been devised based on the drainage map on 1:1 million scale following stream hierarchy where the whole country has been divided into six River Resource Regions, 35 Basins, 112 Catchments, 550 Sub-catchments and 3257 Watersheds.

The codification has been made in a simplistic manner following alphanumeric system.

A watershed can be symbolized as 1A2B3 where: