Major element chemistry of the Bagmati River, Nepal

  • Sadhana Pradhanang Kayastha Central Department of Environmental Science , Tribhuvan University, Kirtipur, Kathmandu , Nepal
  • Bidur Prasad Upadhayay Nepal Academy Science and Technology (NAST), Khumaltar, Lalitpur, Nepal


A study was conducted on June 2013 to evaluate the surface water quality from six representative water samples along the Bagmati River, Nepal. The study was undertaken to assess water chemistry (Ca2+, Na+, K+, HCO3-, NO3-, SO42-, Cl-, F- and H4SiO4)of Bagmati River and thereby influence of natural processes (chemical weathering and rain) and anthropogenic activities like  domestic, industrial and agricultural inputs. The results showed that the pollution is more severe near the urban stretches due to direct discharge of the domestic, industrial and agricultural inputs. The Bagmati River is the dumping ground for domestic and industrial effluents. In the Bagmati River, carbonate contribution is noted to be ~32.5 % from carbonate weathering and ~ 67.5 % from silicate weathering.