Water Quality of Marshyangdi River, Nepal: An Assessment Using Water Quaity Index (WQI)

Water quality index (WQI) is a valuable arithmetic tool that depicts the overall status of water in single number to prioritize for management interventions. This study aims assess based on WQI provide insights into aquatic ecosystems Marshyangdi River basin, tributary Narayani River, originating from Himalaya. samples were collected twenty-one sampling locations covering four districts upstream (Kangsar) downstream region (Mugling) during pre-monsoon season (May) 2019. Eight selected physico-chemical parameters (TDS, pH, EC, DO, Cl-, NH3, PO43-, NO3-) analyzed and aggregated form WQI. Results showed ranges 32.5 46.9, indicating excellent suitable sustenance ecosystem at all locations. These results are expected baseline information present along longitudinal section which could be helpful concerned authorities manage ecosystem.