Eutrophication Eutrophication is the natural process by which waters (lakes, rivers etc)become excessively enriched with nutrients, typically nitrogen and phosphorus. It is one of the ways in which a water body(lake, rivers, and seas) transforms from a state where nutrients are scarce (oligotrophic), through a slightly richer phase (mesotrophic) to an enriched state(eutrophic Human activities often enhance the rate of change due to activities such as farming, forestry road-building, industry and waste treatment that cause nutrients to enter watercourses. This nutrient enrichment often results in a population explosion of algae and other aquatic plantsEutrophication Eutrophication is the natural process by which waters (lakes, rivers etc) become excessively enriched with nutrients, typically nitrogen and phosphorus. It is one of the ways in which a water body (lake, rivers, and seas) transforms from a state where nutrients are scarce (oligotrophic), through a slightly richer phase (mesotrophic) to an enriched state (eutrophic). Human activities often enhance the rate of change due to activities such as farming, forestry, road-building, industry and waste treatment that cause nutrients to enter watercourses. This nutrient enrichment often results in a population explosion of algae and other aquatic plants