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NOAA/AVHRR Monitoring of Snow Cover for Modelling Climate-Affected Runoff in Ganges and Brahmaputra Rivers

K. Seidel and J. Martinec
EARSeL eProceedings No. 2 '3rd workshop on Remote Sensing of Land Ice and Snow', March 2002
Vol. 2 , February 2003

Abstract

Based on snow cover mapping from NOAA/AVHRR 10-days composites, runoff was modelled in the basins of the rivers Ganges (917Õ444 km2, 0-8848 m a.s.l.) and Brahmaputra (547Õ346 km2, 0-8848 m a.s.l.). The temperature and precipitation data were available only as monthly averages and monthly totals, respectively. Another handicap was the relatively small participation of snowmelt in the runoff, evaluated as 9% for Ganges and 27% for Brahmaputra in 1995. Also, the SRM model was for the first time encountered with basins of this size. The combined computed annual runoff for both rivers is 1Õ009Õ732.106 m3 as compared with the measured volume of 983Õ808.106 m3. For a temperature increase of +1.5¡ and precipitation increase by 10% in the summer, an increase of runoff by nearly 25% was computed for the period from April to September. An increase of the already high flood risk and a reduction of permanent snowfields and glaciers will result should this climate scenario materialize.


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@Article{eth_biwi_00352,
  author = {K. Seidel and J. Martinec},
  title = {NOAA/AVHRR Monitoring of Snow Cover for Modelling Climate-Affected Runoff in Ganges and Brahmaputra Rivers},
  journal = {EARSeL eProceedings No. 2 '3rd workshop on Remote Sensing of Land Ice and Snow', March 2002},
  year = {2003},
  month = {February},
  pages = {},
  volume = {2 },
  number = {},
  keywords = {remote sensing, snow cover mapping, hydrology, climate change}}
}