Water monitoring is important to environment control and ecosystem studies which not only scientifically relevant but also legally
binding in several countries. Suspended sediment concentration is one of the main parameters for the water monitoring and can be
roughly detected from satellite. In the present study, the Chao Phraya River mouth was used as a case study to assess the suspended
measuring using water quality index with Landsat TM imagery. A turbidity map was obtain by applying band math and convert to
turbidity backscattering. This solution can be used for water quality index and applying with all satellite data.