1. Aquatic Phenomena

Learn more about observing things like water colour, foam and algae.

This is a page from the online Riverwatch handbook.

What does the colour of the water tell us? Find out here.

Find out more about what you might find on the surface of the water, like foam and excessive plant growth.

If you suspect a blue-green algae bloom, report it immediately and include photos and information on the size and location of the bloom.

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