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 context with the PDO and ENSO, since 1858, total silicate export out of the Columbia river basin through the estuary has decreased over 50 percent with about 40 percent of that reduction liked directly to dam construction. Finally, as discussed above, these changed in nutrient ratios have largely contributed to the greening of the Columbia river estuary. Reservoirs often serve as a catchment basin for organic matter such as vegetation, and waste transferred into the river via rainwater runoff. Initially, this organic matter provides a nutrient source; however, as it continues to accumulate and begins to decompose, the respiration of