Dirty and Rough sea

The sea near this big river is nothing to cherish about. 
When you have plenty of erosion at the upper stream of the big river through various large scale man-made activities, such as logging, plantation,construction, etc. plus the dark brown peat water at the lowland swamps, the whole river is full of eroded materials and brown in colour.When this brown water discharges into the sea, the sea becomes this colour.

You would not want to dip into, would you ?