The evaluation of physico-chemical and biological characteristics of water quality between wet and dry seasons of Nerus River, Kuala Terengganu, Malaysia
The objective of this study is to determine the physicochemical, biological condition and their water classification of the Nerus River, to identify the spatial-temporal reelationship between water quality and the pollution by using statistical techniques. The methodology of the study starting with analyze of 13 of water quality parameters such as temperature, pH, DO, conductivity, TDS, salinity, turbidity, TSS, COD, BOD, NH3-N and E.coli. Total of three sampling stations (station 6, 7 and 11) were selected and sampling was carried out during dry and wet seasons from 2005 to 2010. Results of the study based on WQI, the river at station 6 and 7 was classified as Class II and Class III, while Class III and Class IV for station 11.Under NWQS, the level most of the parameters remained at Class II and Class III.
Keywords: Nerus River; anthropogenic activities; water quality index; national water quality standard