There are also lakes with salt or brackish water, when the substratum contains many soluble salts or it receives an inflow of saltwater. Artificial lakes, which are created by the construction of dams in brooks, streams or rivers in order to store water for various objectives (irrigation, farming, drinking water, etc), is the most important category of artificial (man-made) wetlands in Greece. They cover a considerable area and have contributed to the creation of significant ecosystems in the Greek wetland chapter.
Greece has internationally significant protected wetlands that are included in the International Convention of Ramsar (1971), signed by Greece and ratified by virtue of Legislative Decree 191/74. There are 10 wetlands listed below: