page_title: Adyar River
section_title: Geography
hierarchical_section_title: Adyar River / Geography
caption_attribution_description: English: A panoramic view of en:Adyar River estuary during sunset. On the left is the en:Theosophical Society and on the right is en:MRC Nagar
context_page_description: The Adyar or Adayar, originating near the Chembarambakkam Lake in Kanchipuram district, is one of the three rivers which winds through Chennai, Tamil Nadu, India, and joins the Bay of Bengal at the Adyar estuary. The 42.5-kilometre long river contributes to the estuarine ecosystem of Chennai. Despite the high pollution levels, boating and fishing take place in this river. The river collects surplus water from about 200 tanks and lakes, small streams and the rainwater drains in the city, with a combined catchment area of 860 square kilometres. Most of the waste from the city is drained into this river and the Cooum.
context_section_description: The river has varying depth of approximately 0.75 metres (2.5 ft) in its upper reaches and 0.5 metres (1.6 ft) in its lower reaches. The catchment area of the river is 530 square kilometres (200 sq mi). Bed width ranges from 10.5 to 200 metres (34 to 656 ft). It flows for 24 kilometres (15 mi) in the Chennai Metropolitan Area including about 15 kilometres (9 mi) within the Chennai district before draining into the sea. It discharges about 190 to 940 million cubic metres (150,000 to 760,000 acre⋅ft) water annually to the Bay of Bengal. The discharge is seasonal with about 7 to 33 times more than the annual average during the Northeast monsoon season between September to December. The river is also supplied by surplus water from about 40 ponds.
  The present discharge of the river is 39000 cu.ft/s whereas the anticipated flood discharge capacity is about 60000 cubic feet per second. During the floods of 2005, the river had a discharge of 55000 cubic feet per second.
caption: Sunset over the river
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