As 'natural' icons, Scotland's rivers and lochs represent how the nation imagines itself. However as Dr Iain Stewart discovers, the only thing that happens naturally is rain.
As soon as it hits the ground it's ours and we do with it what we will. Today there are scarcely any rivers or natural large bodies of water left untouched by human activity.
This is the story of how Scotland's waters became some of the most managed on earth.
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Ready to Watch Making Scotlands Landscape, Season 1, Episode 4?