Eutrophication manure production

Another form of alteration of the aquatic basins is represented by the establishment of the pisciculture system, which besides the creation of dames and the pardoning of the lakes, has resulted in the so-called fattening of the basin. This process consists in throwing into the water substantial quantities of manure or nutrients. This is how man with a view to increasing the fish production deliberately accelerates the eutrophication process. Such a situation can be seen at the Tatlageac Lake. 

Animals excrete urine and dung directly to land or it may be collected as manure and recycled. These different forms of excreta need to be estimated since they can be significant contributors to GHG emissions and to nutrient losses to waterways that affect eutrophication potential. For feed production, data are required on land used and external inputs, such as fertiliser and resources, for example, irrigation water. Emissions generated in feed production need to be accounted for (e.g. LEAP, 2014b) in wool LCA studies. 

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