Israel rivers and climate
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Photographic Book Israel |
The principal drainage system comprises Lake Tiberias and the Jordan River. Other rivers in Israel are the Yarqon, which empties into the Mediterranean near Tel Aviv; the Qishon, which runs through the western part of the Plain of Esdraelon to drain into the Mediterranean at Haifa; and a small section of the Yarmūk, a tributary of the Jordan that flows west along the Syria-Jordan border. Most of the country’s remaining streams are ephemeral and flow seasonally as wadis. The rivers are supplemented by a spring-fed underground water table that is tapped by wells. Israel has a chronic water shortage, and its hydraulic resources are fully utilized: about three-fourths for irrigation and the remainder for industrial and household water use. |
Soils |
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The coastal plain is covered mainly by alluvial soils. Parts of the arid northern Negev, where soil development would not be expected, have windblown loess soils because of proximity to the coastal plain. The soils of Galilee change from calcareous rock in the coastal plain, to Cenomanian and Turonian limestone (deposited from 99 to 89 million years ago) in Upper Galilee, and to Eocene formations (those dating from 54.8 to 33.7 million years ago) in the lower part of the region. Rock salt and gypsum are abundant in the Great Rift Valley. The southern Negev is mainly sandstone rock with veins of granite. |
Lake Tiberias. Encarta |
Israel has a wide variety of climatic conditions, caused mainly by the country’s diverse topography. There are two distinct seasons: a cool, rainy winter (October–April) and a dry, hot summer (May–September). Along the coast, sea breezes have a moderating influence in summer, and the Mediterranean beaches are popular. Precipitation is light in the south, amounting to about 1 inch (25 mm) per year in the ʿArava Valley south of the Dead Sea, while in the north it is relatively heavy, up to 44 inches (1,120 mm) a year in the Upper Galilee region. In the large cities, along the coastal plain, annual rainfall averages about 20 inches (508 mm) per year. Precipitation occurs on about 60 days during the year, spread over the rainy season. Severe summer water shortages ensue in years when the rains come late or rainfall totals are less than normal. |
Average annual temperatures vary throughout Israel based on elevation and location, with the coastal areas adjacent to the Mediterranean Sea having milder temperatures—ranging from about 84 °F (29 °C) in August to about 61 °F (16 °C) in January—and higher rates of humidity than areas inland, especially during the winter. Likewise, higher elevations, such as Upper Galilee, have cool nights, even in summer, and occasional snows in the winter. However, the coastal city of Elat, in the south, despite its proximity to the Red Sea, is closer to the climate of the Jordan and ʿArava valleys and the Negev, which are hotter and drier than the northern coast; there, daytime temperatures reach about 70 °F (21 °C) in January and may rise as high as 114 °F (46 °C) in August, when the average high is 104 °F (40 °C). Britannica enciclopedia |
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