The theme for the International Day for Biological Diversity in 2013 chosen by the Convention for Biological Diversity (CBD) is “Water and Biodiversity”. This theme was chosen to coincide with the United Nations designation of 2013 as the International Year of Water Cooperation. The International day for Biological Diversity is celebrated annually on the 22nd of May.
The Lempa River is shared by Guatemala, El Salvador and Honduras, making its management a good example of transboundary cooperation. To reach consensus, action was taken to develop a treaty as part of a regional process. However, since the treaty was not accompanied by strategies designed by local actors, it is somewhat weak. Nonetheless, this case illustrates that political willingness is crucial for advancing towards IWRM in transboundary watersheds.