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Encyclopedia > Silent Valley National Park
Silent Valley National Park
Location on map of India
Silent Valley NP
Silent Valley NP on the map of India
IUCN Category II (National Park)
Location: Palakkad, India
Nearest city: Palakkad, India
Coordinates: 11°7′41″N, 76°26′7″E
Area: 89 km²
Established: 26 December 1980
Visitation: 1,000 (in 1989)

Silent Valley National Park is a National Park in Palakkad district, Kerala, India. It is located in the Kundali Hills of the Western Ghats. It is locally known as 'Sairandhrivanam'. The park is called Silent Valley because of a perceived absence of noisy cicadas. It is a relatively small national park with an area of 89 km². Image File history File links India-locator-map-blank. ... Image File history File links Red_pog. ... The World Conservation Union or International Union for Conservation of Nature and Natural Resources (IUCN) is an international organization dedicated to natural resource conservation. ... Brecon Beacons National Park, Wales, UK A national park is a reserve of land, usually declared and owned by a national government, protected from most human development and pollution. ... For the district with the same name, see Palakkad District. ... For the district with the same name, see Palakkad District. ... December 26 is the 360th day of the year in the Gregorian Calendar, 361st in leap years. ... 1980 (MCMLXXX) was a leap year starting on Tuesday. ... Brecon Beacons National Park, Wales, UK A national park is a reserve of land, usually declared and owned by a national government, protected from most human development and pollution. ... For the district with the same name, see Palakkad District. ...   (IPA: ; ) is a state on the Malabar Coast of southwestern India. ... The Agasthiyamalai range of the Western Ghats The Western Ghats are a mountain range in India. ... Genera Many. ...


The park is one of the last representative tracts of tropical evergreen forest in India which has survived the influence of man. The park is very important to biologists and other researchers due to its rich biodiversity. New plant and animal species are being discovered here every year. Rare bird species found here include Ceylon Frogmouth, Great Indian Hornbill, and the Nilgiri Laughingthrush. The elusive and rare Lion-tailed Macaque is also found here. The mean annual rainfall is over 3000 mm. Binomial name Batrachostomus moniliger Blyth, 1849 The Sri Lanka Frogmouth, Batrachostomus moniliger, is a relatively small frogmouth. ... Binomial name Buceros bicornis Linnaeus, 1758 The Great Hornbill (Buceros bicornis) is a large hornbill. ... Binomial name Macaca silenus (Linnaeus, 1758) The Lion-tailed Macaque (Macaca silenus) is an Old World monkey that lives only in southwest India. ...


The park became the focal point of India's s fiercest environmental debate in the late 1970s and early 1980s, when the Kerala State Electricity Board decided to build a dam across the river Kunthi which runs through the valley. Since then a long-term conservation effort has been undertaken to preserve the Silent Valley ecosystem. Scrivener Dam, in Canberra, Australia, was engineered to withstand a once-in-5000-years flood A dam is a barrier across flowing water that obstructs, directs or retards the flow, often creating a reservoir, lake or impoundment. ...


Trekking in the park requires special permits from the Kerala State Forest department.The nearest town is Mannarkkad.


Geography

Dense vegetation in Silent Valley National Park
Enlarge
Dense vegetation in Silent Valley National Park

Silent Valley is rectangular in shape with a width of around 7 kilometers (in east-west direction) and a length of 12 kilometers. It is separated from the eastern and northern high altitude plateaus (the nilgiris plateau) by high continuous ridges. To the south the park gradually slopes downwards to the Palakkad plains and to west it is bounded by irregular ridges. The altitude of the park ranges from 658 m to 2383 m, but most of the park lies within the altitude range of 880 m to 1200 m. Throughout the 15 kilometere length of the park, the Kuntipuzha drains the area and flows in a North-South direction. Kuntipuzha divides the park into a narrow eastern sector of width 2 kilometers and a wide western sector of 5 kilometers. Most of its larger tributaries join Kunthipuzha from the east.[1] Image File history File linksMetadata Download high resolution version (1632x1232, 671 KB) Summary From [1], stock. ... Image File history File linksMetadata Download high resolution version (1632x1232, 671 KB) Summary From [1], stock. ... Monte Roraima In geology and earth science, a plateau, also called a high plateau or tableland, is an area of highland, usually consisting of relatively flat open country. ... Map of The Nilgiris district The Nilgiris or Blue Mountains are a range of mountains and a district in the south-Indian states of Tamil Nadu and Kerala. ... A drainage basin is the area within the drainage basin divide (yellow outline), and drains the surface runoff and river discharge (blue lines) of a contiguous area. ... A tributary (or affluent or confluent) is a contributory stream, a river that does not reach the sea, but joins another major river (a parent river), to which it contributes its waters, swelling its discharge. ...


Silent Valley gets copious amounts of rainfall during the monsoons, but the actual amount varies within the region due the varied topography. In general the rainfall is higher at higher altitude and decreases from the west to east due to the rain shadow effect. Eighty per cent of the rainfall occurs during the south-west monsoon between June and September. It also receives significant amount of rainfall during the north-east monsoon between October and November. The mean annual rainfall ranges from 4500 mm in the west to around 3200 mm in the eastern side of the park. The mean annual temperature is 20.2 C. The hottest months are April and May when the mean temperature is 23 C and the coolest months are January and February when the mean temperature is 18 C. Because of the high rainfall, the relative humidity is consistently high (above 95%) between June and December.[1] This article or section does not cite its references or sources. ... // A rain shadow (or more accurately, precipitation shadow) is a dry region on the surface of the Earth that is leeward or behind a mountain with respect to the prevailing wind direction. ... Monsoon in the Vindhya mountain range, central India A monsoon is a wind pattern that reverses direction with the seasons. ... This article does not cite its references or sources. ...


The park borders the scenic Mukurthi National Park in Tamil Nadu towards its north-east. A national park found in the state of Tamil Nadu in India. ...


Notes

  1. ^ a b The UNEP-WCMC report dated 1991

External links

  • more about the park
  • Birds of India
  • Aerial view of the park's dense rainforests
     
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