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Delhi Ridge, sometimes simply called The Ridge, is a ridge in the National Capital Territory of Delhi in India. The ridge is a northern extension of the ancient Aravalli Range, some 1500 million years old (compared to just 50 million for the Himalaya). The ridge consists of quartzite rocks and extends from the Southeast at Tughlaqabad, near the Bhatti mines, branching out in places and tapering off in the north near Wazirabad on the west bank of the river Yamuna, covering a distance of about 35 kilometers. The Delhi Ridge is said to be the green lungs for the city and protects Delhi from the hot winds of the deserts of Rajasthan to the west. It is also responsible for earning Delhi the tag of the world's second most bird-rich capital city, after Kenya's Nairobi.〔http://www.asiarooms.com/en/travel-guide/india/delhi/delhi-parks-and-gardens/index.html〕 ==Geographical segments== The Ridge today, for administrative reasons, is divided into 4 separate zones,〔(【引用サイトリンク】 Trees of Dellhi )〕 namely: # The ''Old Delhi'' or ''Northern Ridge'' denotes the hilly area near Delhi University and is by far the smallest segment of the Ridge. Nearly 170 hectares were declared a Reserved Forest in 1915. Less than 87 hectares remain today, which is slated to develop as Biodiversity Park by the Delhi Development Authority. # The ''New Delhi'' or ''Central Ridge'' was made into a Reserved Forest in 1914 and stretches from just south of Sadar Bazaar to Dhaula Kuan. It extends over 864 hectares, but some bits have been nibbled away. # The ''Mehrauli'' or ''South-Central Ridge'' is centred on "Sanjay Vana", near JNU and Vasant Kunj, and encompasses 633 hectares. Large chunks have been encroached and built upon. # The ''Tughlaqabad'' or ''Southern Ridge'' sprawls across 6200 hectares and includes the Asola Bhatti Wildlife Sanctuary. This is the least urban of the 4 segments of the Ridge, but a lot of it is village-owned or privately owned farmland. 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「Delhi Ridge」の詳細全文を読む スポンサード リンク
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