Determination of eutrophication status in coastal waters by using a multivariate index with principal component analysis (PCA) in Hormozgan province

The present study ,Principal component analysis and multivariate index were used for Classification and determine of trophy by according to the European water framework directive in coastal water hormozgan province. In the proposed approach, the first principal component is used and evaluated as a eutrophication index on independent dataset and four variables nitrate, nitrite, ammonia and phosphate as abiotic factors for biomass and chlorophyll a was used as an indicator of phytoplankton production. Water samples were collected at 10 stations during the 12 months in 2012. During the investigation, Lower Trophy (0.1) were at stations 9 & 10 and the Highest value(1.5) observed at the station 3(goorsoozan area). Based on the criteria by according to the European water framework directive ,level trophy in near coastal water and far from coast of Bandar Abbas have been In the situation of mezotroph condition, and the area Jask and Lengeh in oligotrophic condition respectively.Temporal analysis of Trophic conditions showed that the trophic status can be divided into first(oligo- mezotroph) and second(Mezo-Eutroph) periods. Also in many times, the level of water quality in coastal water of Bandar Abbas is the rank good or fairly good and the other area(Jask and Lengeh ) the good rating respectively.The low quality of coastal water in Bandar Abbas due to the potential impacts of the entry of nutrients from domestic and urban sewage into coastal waters.