Codification System Alphanumeric system has been
followed to codify the different hydrologic units.
Different stages of delineation have been codified in a systematic way alternating
with Arabic numerals, English capital and small alphabets as follows: v Water Resources
Regions: 1, 2, 3, 4, 5, 6 v Basins: A, B, C, D,
E, F
v Catchments: 1, 2, 3,
4
v Sub Catchments: A, B,
C, D, E, F, G
v Watersheds: 1, 2, 3,
4, 5, 6
9 For example, watershed code 5D5A6 connotes: v 5: Region
(Rivers flowing into Arabian Sea) v D: Basin
(Narmada) v
5: Catchment (Tawa
confluence of Marble rocks left bank of Narmada) v A:
Subcatchment (Tawa confluence to Denwa) v 6: Watershed
(Sonbhadra) This Watershed Atlas of India
(WAI) has been prepared on a 1: 1000K scale and contains a total of 76 map plates.
Positional reference of the 76 map plates (Key to Plates) is depicted in fig. 8. |