is shylock a perennial river?
The perennial rivers include Ganga, Yamuna, Indus, Brahmaputra, Narmada, Mahanadi, Tapti, Ghagra(saraswati), Sutlej and Thamiraparani(only perennial river from the south). ... These are the perennial rivers so called because these have water all through the year as they stem out of the Himalayan glaciers and lakes.