Ithis study, by means of the multivariate analysis, a set of data with large volumes of water quality variables was investigated. Information included23 quality parameters of Karkheh Riverin ten monitoringtatioof water quality for duration of 5years.Data matrix (13800 Views) using the multivariate analysiuch a Hierarchical cluster analysias well as factor analysis /principal component analysis was investigated. Usinghierarchical clusteranalysis,the statiowere kashida; TEXT-ALIGN: justify; TEXT-KASHIDA: 0%; MARGIN: 0in 0in 0pt; unicode-bidi: embed; DIRECTION: ltr" Keywords: Karkhe River, Water quality, Multivariate statistical methods, Factor nalysis, Principal component analysis,.Gamma Test