Abstract
The length of the main trunk in a river basin is an important morphometric parameter and it depends on the size of the drainage basin. The Ganga River Basin is one of the largest basins in the world with the Ganga River considered to be the main stem. Variable lengths of this river in the literature motivated us to study its exact length and also to test whether geomorphically it is the longest river in the basin. The results show that the maximum river length of 2758 km is attained when source is considered at the headstream of the Tons River. This length is more than any of the traditional lengths of the Ganga River in the literature. We propose to call the longest segment of the river in Ganga Basin as the Himalayan Foreland River.
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