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
Nutrient cycling in the Columbia River Basin and the rapid alteration of land in the past several centuries has shifted many aspects of nutrient dynamics within this environment. Human processes such as construction (such as for dams), logging, and mining can impact sediment transport, resulting in decreased accumulation and/or the enhancement or removal of nutrients. The cycling of nutrients within the Columbia River Basin is also affected by differences in land-use through variability in human development and vegetation. Land use of the basin within the United States is primarily forested (87 percent), with 11 percent of land used for agriculture, and 2 percent for urban areas. Human-related