1 23 Spatial Information Research ISSN 2366-3286 Spat. Inf. Res. DOI 10.1007/s41324-016-0074-2 Bank erosion and accretion dynamics explored by GIS techniques in lower Ramganga river, Western Uttar Pradesh, India Rameswar Mukherjee, Ram Bilas, Sumantra Sarathi Biswas & Raghunath Pal