Water colour
What is it? The overall colour of the water.
Why is it important? Clear water could indicate low productivity. Yellow or brown water can indicate organic matter and sediment accumulation in a water body. Some algae and dinoflagellates can also cause the water to turn a reddish or deep yellow colour.
What does it mean? Many things can influence water colour, making it anywhere from clear, dark blue, brown, yellow, green, or even red. The water’s colour can mean many different things.