<Main headwaters in Israel>
Israel depends three main headwaters; (1) Galilee Lake and Jordan River Valley (2) Mountain aquifer (3) Costal aquifer. Mountain aquifer stretches out from spine of range of West Bank mountains to Israel. Costal aquifer stretches out along the costal plain crossing from Israel to Gaza. Fluctuations in the amount of rainfall are difficult to predict. Supply of renewable fresh water becomes irregular, especially in drought years. Supply of annual water in Israel is 2100MCM altogether. Surface water of Jordan River shares 30% of them. Groundwater from aquifers share 45% of them. 25% of the rest comes from other sources; main source is recycle water.
Jordan River covers 18,300km2 area. It stretches from as far north as Mount. Helmon, which is the juncture of borders of Israel, Lebanon and Syria, to as far south as Dead Sea. Jordan River Valley has main three headwaters; (1) Dan River whose headwater is in Israeli territory. Annual water supply is 250MCM. Discharge to Galilee Lake is approximately 540MCM. (2) Banias River (including Helmon Spring) whose headwater is from Golan Heights provides annual water supply is 120MCM. It is affected by the seasonal fluctuation. (3) Hasbani River whose headwater is from Lebanon provides annual water supply is approximately 130MCM.
<Galilee Lake>
Galilee Lake is flowed from precipitation, discharge and springs near the lake. They include salt. Salt accumulation is deteriorating year by year. Storage capacity of Galilee Lake is approximately 4300MCM. Israel started to utilize water from Yarmuk River for 70MCM a year since early 1990. According to Jordan-Israel Peace Treaty, diversion from Yarmuk River as amount of 25MCM was reduced. Israel is separately allowed to pump water 20MCM from Yarmuk River into Galilee Lake in winter. On the one hand, Israel has to release the same amount of water to Jordan. Loss by evaporation is 300MCM annually. 500MCM water from Galilee Lake is available to provide the local people. The National Water Carrier conveys water to densely populated costal area North Negev for irrigation. The National Water Carrier takes in most headwaters in the country to dissolve the utilization of water divide that exists in the regions.