What is "kairatos"

The Kairatos is a natural watercourse on the island of Crete in Greece. In the Minoan era, aqueducts diverted water to Kephala hill from spring water sources at Archanes, which springs are the headwaters of the Kairatos River; in fact, the Bronze Age palace of Knossos lay upon the gently sloping banks of the Kairatos.