Subject(s): River -- Ecology -- Ganga -- Brahmaputhra -- River : sediment load, nutrient transport and nutrient spiralling concept, river classification, river continuum concept, Indian river ecology -- Himalayan rivers and their environment, Indus and upper Ganga, middle Ganga plains, lower Ganga plain and Brahmaputra, Saline rivers of western India, Narmada and Tapi, medium and minor river basins, major rivers of Orissa, major Peninsular rivers, river water chemistry, Plankton ecology