Sea level the warmer water expands. For at least the last 100 years, sea level has been rising at an average rate of about per year. Most of this rise can be attributed to the increase in temperature of the sea and the resulting slight thermal expansion of the upper of sea water. Additional contributions, as much as one-quarter of the total, come from water sources on land, such as melting snow and glaciers and extraction of groundwater for irrigation and other agricultural and human uses. Pilots can estimate height above sea level with an altimeter set to a defined barometric pressure.
Red Sea–Dead Sea Water Conveyance planners was the Zionist leader Theodor Herzl. The Red Sea Dead Sea conduit was proposed at the end of the 1960s and was analyzed as part of the peace process between Israel and Jordan. In the late 1990s a team headed by Refael (Rafi) Benvenisti working with Minister Shimon Peres as the Minister of Regional Cooperation suggested to establish the stabilization of the Dead Sea water level ('Saving the Dead Sea') as a major objective of the project. It suggested building the project in stages in order to test the mixing of the two seas water phasing the big investment