Acid Waters in Wales

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The book explores the alarming issue of stream acidification in Welsh surface waters, revealing how this phenomenon was largely overlooked until the 1980s. It highlights the misconception that Wales' precipitation was largely unpolluted, despite its proximity to industrial emissions. Key research focused on the Llyn Brianne reservoir area, linking stream chemistry—particularly pH, aluminum, and calcium levels—to the decline of migratory salmonid populations. The findings underscore the critical relationship between land use, water quality, and fisheries health in Wales.