Perennial rivers are those rivers which are full of water throughout the year because they receive their water from the mountainous snowy regions or glaciers. There are 10 perennial rivers in India, and most of them are in the northern region. They are Ganga, Yamuna, Indus, Brahmaputra, Narmada, Mahanadi, Tapti, Garghara (Saraswati), Sutlej and the sole perennial river in the south is Thamirabarani.
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