What is "xerias"

The Xerias, (, from ξερός, "dry") is an arroyo in the Argolid in Greece. Its ancient name was Charadros , which is still used, although its Demotic name is by far the most common and used on modern maps. It is not to be confused with the Charadros in Achaea, nor should its modern name be confused with the Xerias in Thessaly nor the Xerias River that flows through Corinth (also known as the Leukon). Under its ancient name, it is described in Pausanias's Description of Greece (2.25.2).