Dead Sea 342 parts per thousand (in 2002), and a temperature that swung between and . Underneath a zone of transition, the lowest level of the Dead Sea had waters of a consistent temperature and complete saturation of sodium chloride (NaCl). Since the water near the bottom is saturated, the salt precipitates out of solution onto the sea floor. Beginning in the 1960s, water inflow to the Dead Sea from the Jordan River was reduced as a result of large-scale irrigation and generally low rainfall. By 1975, the upper water layer was saltier than the lower layer. Nevertheless, the upper layer remained
Alapaha River the Alapahoochee River and the short Little Alapaha River, which rises in Echols County, Georgia, and flows southwestward. The Alapaha River is an intermittent river for part of its course. During periods of low volume, the river disappears underground and becomes a subterranean river. At approximately downstream from Jennings, Florida the Dead River enters the Alapaha River. It is a usually dry river bed with a number of sinkholes, including the Dead River Sink. During periods of low water flow, the Alapaha River downstream from the confluence of the Dead River and the Alapaha River flows upstream into the Dead