Microsoft Word ID05 Nguyen Minh Ky 6 ������������ ��� �� �������������������������������� Trang 50 Using multivariate statistical techniques to assess water quality of Nhu Y river in Thua Thien Hue pr[.]
_ Using multivariate statistical techniques to assess water quality of Nhu Y river in Thua Thien Hue province Nguyen Minh Ky College of Sciences, Hue University Nguyen Hoang Lam Danang University of Technology (Bài nh n ngày 07 tháng 08 năm 2014, nh n ñăng ngày 08 tháng 10 năm 2014) ABSTRACT The aims of this research are to assess water quality by organic and nutrient matters and identifying the environmental pressures, examine the impact of the loads to Nhu Y River, Thua Thien-Hue Province Five stations were sampled at Nhu Y River, the research had monitoring of water quality parameters such as Temperature (Temp), Dissolved Oxygen (DO), Biological Oxygen Demand (BOD5), Chemical Oxygen Demand 3(COD), Nitrate (NO3 ) and Phosphate (PO4 ) The research used multivariate statistical techniques such as correlation analysis, principal component analysis (PCA) and cluster analysis (CA) to assess water quality The correlation analysis shown a strong positive correlation exists between water quality parameters such as Temp DO and BOD5 COD (p