Application of Grey Clustering Method to assess eutrophication in six freshwater Colombian wetlands
DOI:
https://doi.org/10.5377/ryr.v0i47.6282Keywords:
Eutrophication, total phosphorus, total nitrogen, nutrients, Grey Clustering Method, Grey TheoryAbstract
Wetlands are invaluable natural resources, threatened by the surplus of nutrients which trigger a process known as eutrophication. Assessment of eutrophication is a first step in wetland restoration. A methodology to classify by level of eutrophication is needed as current systems use nutrient-specific indexes without consideration of nutrient interactions. The Grey Clustering Method (GCM) allows use of different standards and takes into account interaction. We used GCM and two standards (international and Chinese) and two parameters (total phosphorus and total nitrogen) to assess the eutrophication level of six freshwater Colombian wetlands: Tibanica, Capellanía, De Techo, La Vaca, La Conejera and Laguna Fúquene. Using either standard, Laguna Fúquene was classified as an eutrophic wetland, while the others were classified as eutrophic using the international standard and hypertrophic using the Chinese standard. Analysis of order showed that Tibanica, Capellanía, De Techo, La Vaca, and La Conejera wetlands are more eutrophic than Laguna Fúquene using the international standard.
Reality and Reflection Year 18, No 47, January-June 2018; pp.147-162
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