Brahamaputra Basin
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<strong>Brahamaputra</strong> <strong>Basin</strong><br />
5.2 Flood forecasting sites<br />
Flood forecasting is an important component of flood warning, where the distinction between the<br />
two is that the outcome of flood forecasting is a set of forecast time-profiles of channel flows or<br />
river levels at various locations, while "flood warning" is the task of making use of these forecast to<br />
make decisions about whether warnings of floods should be issued to the general public or whether<br />
previous warnings should be rescinded or retracted.<br />
Central Water Commission, Ministry of Water Resources has set up a network of flood forecasting<br />
stations covering all important flood prone rivers. Brahmaputra basin covers a part of the most flood<br />
prone areas of the country. Flood forecasting has been recognized as the most important, reliable<br />
and cost effective non-structural measures for flood mitigation. Two kinds of forecasts are issued<br />
based on the utility of the forecast. Inflow forecasts assist in reservoir regulation (full reservoir level<br />
& maximum water level) and the level forecast is used for predicting water level (warning level &<br />
danger level) well ahead of its occurrence.<br />
The Central Water Commission operates 27 flood forecasting stations for Level forecast as shown in<br />
the Table 12. Distributions of the Flood Forecasting Sites are shown in Map 17. The details of the<br />
attributes realted to these flood forecasting sites are listed in Annexure VI: B.<br />
5.3 Meteorological stations<br />
Table 12. Types of flood forecasting stations of CWC<br />
Sl. No. Station Type Number Of Stations<br />
1 Level forecast 27<br />
2 Inflow Forecast 0<br />
There are 114 CWC Observation Stations and 27 flood forecasting stations in the basin maintained<br />
by Central Water Commission. These stations are established to understand the relationship<br />
between meteorological parameter and river dynamics. Under the supervision of ISRO there are 89<br />
AWS are established in the basin as shown in Table 13. The integrated approach of measuring<br />
meteorological parameter using Automated Weather Stations (AWS) is helpful in the remote region<br />
where due to climatic conditions and difficult terrain manual observation of data is not possible. This<br />
AWS required a minimum maintenance and the data is generated on the temporal basis. These<br />
stations are maintained and data stored by the MOSDAC.<br />
Table 13. Meteorological stations<br />
Sl. No. Organisation Number of Stations<br />
1 CWC Observation Stations 114<br />
2 IMD Stations 109<br />
3 ISRO AWS Stations 89<br />
www.india-wris.nrsc.gov.in<br />
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