Zarqa River
The Jordan River is short, but from its mountain headwaters (approximately 160 kilometers north of the river's mouth at the Dead Sea) the riverbed drops from an elevation of about 3,000 meters above sea level to more than 400 meters below sea level. Before reaching Jordanian territory the river forms the Sea of Galilee, the surface of which is 212 meters below sea level. The Jordan River's principal tributary is the Yarmouk River. Near the junction of the two rivers, the Yarmouk forms the boundary between Israel on the northwest, Syria on the northeast, and Jordan on the south. The Zarqa River, the second main tributary of the Jordan River, flows and empties entirely within the East Bank.