• Mr. Bishnu Dev Das
• Dr. Braj Nandan Kumar
• Dr. Ranjan Kumar Mishra
• Dr. Sunil Kumar Choudhary

Abstract: The research is aimed to assess the water quality index (WQI) for the surface water of Betna wetland. This has been determined by collecting the surface water samples and subjecting the samples to a comprehensive physicochemical analysis. For calculating the WQI, the following 11 parameters have been considered: Temperature (ambient and water), pH, turbidity, TDS (Total Dissolved Solid), Cl- (chloride), EC (Electric Conductivity), DO (Dissolved Oxygen), TH (Total Hardness), PO4–P (Phosphate – phosphorus), NO3-N (Nitrate – nitrogen), COD (Chemical Oxygen Demand). The WQI for these samples has been found to be mainly from the higher values of turbidity, DO and PH of the wetland water. The result of WQI has indicated at the site-I, the calculated value (ΣSIi =87.63) showed the good quality, at the site-II the value of WQI (ΣSIi =124.51) showed the poor quality and at the site-III the value of WQI (ΣSIi =226.95) showed the water was unsuitable for drinking as per the classification given and needs some proper treatment before consumption, and it also needs to be protected from the risk of contamination. The mean value of fecal coli form recorded was 1900 MPN/l00 ml which was crossed the WHO guide line.

Water quality standards, Water quality index, Betna wetland, Nepal.

"Assessment of Water Quality Index for the Surface Water in Betna Wetland of Morang District, Nepal", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 2, page no.831-834, February-2018, Available :http://www.jetir.org/papers/JETIR1802138.pdf

"Assessment of Water Quality Index for the Surface Water in Betna Wetland of Morang District, Nepal", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 2, page no. pp831-834, February-2018, Available at : http://www.jetir.org/papers/JETIR1802138.pdf