| Popis: |
Three major river basins of India which include the Indus , the Ganges and the Brahmaputra contribute more than 50 % of the river discharge of the country. Widely varying average annual precipitations have been reported for these basins. The average annual precipitation is a basic input data for any developmental planning. Low density of rain gauge stations especially in mountainous area, extreme variation in altitudes and large size of these basins forces adaption of remote sensed data for estimation of average annual precipitation. In the present study, 11-years (2000–2010) Tropical Rain Measurement Mission (TRMM) generated radar precipitation raw data has been used for estimating the annual precipitation. The results indicate 434, 1,094 and 2,143 mm annual precipitation for the Indus, the Ganges and the Brahmaputra basins respectively. The contoured distribution of precipitation indicates the orographic control as the primary factor on the summer monsoon precipitation in the Ganges and the Brahmaputra basins. Indus basin behaves independent of the Indian summer monsoon. |
