Statistical Modelling of Water Quality of River Godavari at Rajahmundry and Dhawaleswaram, AP

An attempt has been made in this present work, to study the seasonal variations of water quality of River Godavari for the period of 2004-2012 at Rajahmundry and Dhawaleswaram located on the banks of River Godavari in Andhra Pradesh. This water quality modelling is done with the help of Water Quality Indices (WQI) computed using NSFWQI and WAIWQI methods. Multivariate statistical techniques namely Factor Analysis (FA), Cluster analysis (CA), and Principal Component Analysis (PCA) are used to conduct the statistical modelling of river water quality in the study area using SPSS 20.0 software. The study using the Water Quality Indices (WQI) indicated that the quality of water is found to be moderate w.r.t physico-chemical parameters and poor w.r.t biological parameters. The WQI values projected for the future period i.e. 2014, 2015, 2016 indicated no perceptible change in the quality of water. The Multivariate Analysis resulted in the study has shown the highest pollution loadings for the Monsoon and Post-monsoon seasons. The variation in DO_Sat% is found to vary the degree of pollution as per the variances obtained from the Multivariate Analysis. Therefore, it is concluded that the quality of River Godavari at Rajahmundry and Dhawaleswaram is moderate at present and its quality in the future might not have a perceptible change if the present conditions prevail and unchanged.