Fig. 1

a Land-to-deepsea sediment routing system of River Indus flowing from Himalayan region and depositing sediments to the Arabian Sea forming the Indus Fan is depicted here. Indian subcontinent; upper, middle and lower Indus Fan margins; and major fluvial rivers such as Indus, Ganga and Narmada are also shown in the map. Survey block, in which channels discussed in this study, is marked for reference. b Reconstruction of Indus channel system from global bathymetry data is marked. Channels identified in upper and middle fan from Kenyon et al. (1995) and Prins et al. (2000); channels from lower fan identified by Kodagali and Jauhari (1999) are marked. Channels identified by Mishra et al. (2015) which are explained in greater detail in this study are also shown. A reconstruction of the channel network from the Indus Canyon to the identified channels using global bathymetric data (Smith and Sandwell 1997) is portrayed for creating a generic pattern of channel network in the upper Indus Fan (Prerna et al. 2015)