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2009 Jeddah floods : ウィキペディア英語版 | 2009 Jeddah floods
The 2009 Saudi Arabian floods affected Jeddah, on the Red Sea (western) coast of Saudi Arabia, and other areas of Makkah Province. They have been described by civil defence officials as the worst in 27 years. As of 3 January 2010, some 122 people are reported to have been killed,〔 and more than 350 were missing.〔 Some roads were under a metre (three feet) of water on 26 November, and many of the victims were believed to have drowned in their cars. At least 3,000 vehicles were swept away or damaged.〔〔 The death toll was expected to rise as flood waters receded, allowing rescuers to reach stranded vehicles. More than 90 millimetres (3½ inches) of rain fell in Jeddah in just four hours on Wednesday 25 November.〔 This is nearly twice the average for an entire year and the heaviest rainfall in Saudi Arabia in a decade. The flooding came just two days before the expected date of the Eid al-Adha festival〔 and during the annual Hajj pilgrimage to nearby Mecca. Business losses were estimated at a billion riyals (US$270 million). The poorer neighbourhoods in the south of Jeddah were particularly hard hit, as was the area around King Abdulaziz University. The university was closed for vacation at the time of the floods, preventing even higher casualties. ==Geography and hydrology of Jeddah== The city of Jeddah is situated on the Red Sea coast, beneath the northern escarpment of the Red Sea Rift known as the ''Jabal al-Hejaz'', which reaches 600–1,000 metres (1,800–3,000 feet) in the region. The population of the city is about 3.4 million (2009 estimate) in an urban area of , giving a population density of 1,900 hab./km2 (5,000 hab./sq. mi.). The climate is arid, with most rainfall occurring between November and January, usually as thunderstorms. At least eleven ''wadis'' converge on the city,〔 and localised flooding is common after rain. The municipality is currently investing 1 billion riyals (US$270 million) in storm drains, but the cost of a full system is estimated at an additional 3 billion riyals (US$800 million). In November 2009, only some 30% of the city was protected against flash-flooding and then, often with only one-inch (25-millimetre) pipes.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「2009 Jeddah floods」の詳細全文を読む
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