Water politics in the Jordan River basin the salinity of the tributary Yarmouk River is also satisfactory, at 100 ppm, but the lower Jordan river becomes progressively more saline as it flows south. It reaches twenty-five percent salinity (250,000 ppm) where it flows in the Dead Sea, which is about seven times saltier than the ocean. As a resource for freshwater the Jordan River drainage system is vital for most of the population of Palestine, Israel and Jordan, and to a lesser extent in Lebanon and Syria who are able to use water from other national sources. (Although Syrian riparian rights to the Euphrates has been severely
Dead Sea in the northern part of the Dead Sea and barely in the southern part. The Dead Sea zone's aridity is due to the rainshadow effect of the Judaean Mountains. The highlands east of the Dead Sea receive more rainfall than the Dead Sea itself. To the west of the Dead Sea, the Judaean mountains rise less steeply and are much lower than the mountains to the east. Along the southwestern side of the lake is a tall halite formation called "Mount Sodom". There are two contending hypotheses about the origin of the low elevation of the Dead Sea. The older