differentiate between perennial and seasonal rivers
the rivers which flow or hold water throughout the year are called perennial rivers. eg-Indus, Ganga, Brahmaputra while the rivers whose depend on rainfall and they flow only during some months of the year are called seasonal rivers. eg--Godavari, Mahanadi,etc
perennial rivers generally have their source from the glaciers while the seasonal rivers are generally rain-fed.
perennial river have long courses while seasonal rivers have shorter courses.
the former have deep river-bed are swift flowing while the latter have shallow river-bed are not so swift flowing .