Ganges Basin (112,490 km²), West Bengal (71,485 km²), Haryana (34,341 km²), Himachal Pradesh (4,317 km²) , Delhi, Arunachal pradesh(1,484 km²), the whole of Bangladesh, Nepal and Bhutan. Several tributaries rise inside Tibet before flowing south through Nepal. The basin has a population of more than 500 million, making it the most populated river basin in the world. The basin comprises semi-arid valleys in the rain shadow north of the Himalaya, densely forested mountains south of the highest ranges, the scrubby Shiwalik foothills and the fertile Gangetic Plains. Central highlands south of the Gangetic Plain have plateaus, hills and mountains intersected by valleys
Interstate Commission on the Potomac River Basin use. In 1975, an ICPRB conference focuses on rising dollar and energy costs associated with Washington, D.C. metro area sewage treatment. 1980s - ICPRB initiates regional discussion of the problem posed by invasive aquatic weed, hydrilla (1983). After Maryland (1985) and the District of Columbia (1986) initiate a phosphate detergent bans, ICPRB recommends (1987) expanding such bans basin-wide. 1990s - Maryland, West Virginia and ICPRB sign (1993) cooperative agreement on program to restore water quality to the North Branch. Interstate Commission on the Potomac River Basin The Interstate Commission on the Potomac River Basin (ICPRB) is an agency composed of