Penentuan Kualitas Perairan Sungai Indragiri Berdasarkan Koefisien Saprobik D…

Indragiri river is one of the largest rivers in the Riau Province. A study on the water quality of the Indragiri River based on Saphrobic Plankton Coefficient was conducted on July 2018. Samples was taken from three sampling points, far from human settlement, in the delta and close to human settlement. There were 3 sampling points in each station. Samples were taken 3 times, once a week. Parame…