Brahamaputra Basin

Brahamaputra Basin
5. Hydro-met observations
5.1 Hydrological observation sites
Hydrological observations in the Brahmaputra basin are carried out by the Central and State
Governments. The Central Water Commission maintains 114 hydro observations sites in the
Brahmaputra basin. These H.O stations carry out observations about various hydrological
parameters as gauge (river water level), discharge (amount of water released from a cross section in
the river in a given time period), sediment (concentration of solid particles in water) and river water
quality pertaining to different quality parameters. Some of the H.O sites also measure various
climatic parameters. In addition to these sites some of the sites are directly engage for flood
forecasting activities. The spatial distribution of the Hydro-observation stations are shown in the
Map 17. The 76 HO sites are located in Brahmaputra Lower Sub basin and 38 lies in Brahmaputra
Upper Sub basin.
These stations are categorized as G, GD, GQ, GDQ, GDS, GDSQ, RF and Snow, where the abbreviation
stands as: G-Gauge, D-Discharge, S-Sediment and Q-Water Quality. RF -for rainfall measuring station
and Snow- snowfall measuring station in the basin. The Central Water Commission maintains 27
gauge sites, 5 gauge discharge sites, 40 gauge quality sites, 14 gauge discharge quality sites, 10
gauge discharge sediment sites, and 18 gauge discharge sediment quality sites are maintained by
CWC for the study of hydrological observations in basin as shown in table 10. There is no purely
Rainfall measuring and Snowfall measuring sites operated by CWC in Brahmaputra basin. The details
of the attributes realted to these sites are listed in Annexure VI: A.
Table 11. Hydrological observation sites of CWC
Sl. No. Station Type Number of Stations
1 G 27
2 GQ 40
3 GD 5
4 GDQ 14
5 GDS 10
6 GDSQ 18
7 RF 0
8 Snow 0
www.india-wris.nrsc.gov.in
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