Najafgarh drain

The Najafgarh drain or Najafgarh nalah (nalah in Hindi means rivulet or storm water drain), which also acts as Najafgarh drain bird sanctuary, is another name for the northernmost end of River Sahibi, which continues its flow through Delhi, where it is channelized, and then flows into the Yamuna. Within Delhi, due to its channelization for flood control purposes, it is now erroneously called "Najafgarh drain" or "Najafgarh nullah." It gets this name from the once famous and huge Najafgarh Jheel (lake) near the town of Najafgarh in southwest Delhi and within urbanized Delhi. It is the Indian capital’s most polluted water body due to direct inflow of untreated sewage from surrounding populated areas. A January 2005 report by the Central Pollution Control Board classifies this drain, with 13 other highly polluted wetlands, under category ‘‘D’’ for assessing the water quality of wetlands in wildlife habitats.[1][2][3][4][5]

This article is about the drain. For bird sanctuary and wetland ecosystem, see Najafgarh drain bird sanctuary. For lake or jheel, see Najafgarh lake.

Aerial view
Najafgarh Drain flowing through Kakrola Bridge near Dwarka Sector 16

This drain was widened as a flood control drain linking the Najafgarh lake to the river Yamuna, thus completely draining the once huge and ecologically rich Najafgarh Lake, famous for its wetland ecosystem, waterbirds and wildlife.

Classification and naming

Within the National Capital Territory of Delhi (NCT), this channelized waterway—misclassified, misnamed as a mere drain (Najafgarh drain or nullah)--is, in fact, the continuation of the Sahibi River and an elongation of the Najafgarh jheel Lake. During the 1960s and before, the rain-fed Sahibi River, which originates in the Jaipur District of Rajasthan, passing through Alwar District in Rajasthan and Gurgaon District in Haryana, entered Delhi near Dhansa and spilled its overflow in the Najafgarh Lake basin. This overflow created a seasonal lake; an area of more than 300 square kilometres (120 sq mi) was submerged in some seasons. This water then continued to flow on the other side, forming a tributary of the River Yamuna. In the following decades, this Sahibi River flow reaching the Dhansa regulators was channelized by digging out a wide drain and connecting it directly to the River Yamuna. This channelization also completely drained off the seasonal Najafgarh Jheel that had formed there previously. The channelized drain from Dhansa regulators to Keshopur Bus Depot on Outer Ring Road is wide with thick and high embankments. A vast amount of water is retained in this widened drain by closing the Kakrola regulators under Najafgarh Road to recharge the local ground watertable; hence it acts like an elongated lake as well.[6]

Bird sanctuary and wetland
Main article: Najafgarh drain bird sanctuary

Wetland ecosystem and wildlife habitat important to migratory waterbirds and local wildlife

The drain has been much widened over the years to drain all the water which in earlier decades used to collect in the Nagafgarh Jheel basin; this was supposedly done to remove the threat of flooding in Delhi[7][8] and now the drain itself acts as an elongated water body or lake with trees planted on both its embankments with an inspection road running on one embankment. During the winter months it attracts vast numbers of migratory birds and also supports local wildlife year-round. Due to the rich wildlife observed in and around the less polluted stretch of the drain outside of congested populated areas, it has been proposed as a bird sanctuary for Delhi.[9][10][11]

The wetland ecosystem and wildlife habitat on several kilometers of less polluted Najafgarh drain in rural Delhi before entering the main city including the former Najafgarh lake or Najafgarh jheel area is very important habitat to migratory waterbirds as well as local wildlife and has been earmarked to be declared a bird sanctuary for Delhi. The area came to be recognized as an important wildlife habitat after a local naturalist studying the area during 1986–88 called attention to it recommending it to be conserved as a bird sanctuary after which the Delhi wildlife department posted 16 guards in the area to control illegal bird hunters including diplomats from various international embassies located in Delhi, India's capital. Delhi Administration officials were tasked with declaring about 25-kilometre (16 mi) stretch of the drain in rural Delhi, including where it passes through the core area of the now drained Najafgarh Lake, "protected" under the "Wildlife Act" after Lt.-Governor of Delhi Mr. H.L. Kapur was invited to the area for touring the site where he also heard accounts of local villagers about the rampant illegal hunting of waterbirds that went on here every year. The existing staff of the Flood Control and Irrigation Department numbering about 40 were also given the additional responsibility of protecting the wildlife on and around the drain.[12][13][14]

Forested embankments

The Najafgarh drain has been much widened over the past decades and now has thick mud embankments on both its sides to channel the waters and protect Delhi from floods, these embankments have been planted with thick forest cover which serve as a much needed habitat for remnant local wildlife occurring in nearby and surrounding farmlands including common foxes, jackals, hares, wild cats, nilgai, porcupines and various reptiles and snakes including the dreaded cobras. Many local birds including waterbirds roost and nest in these trees.

Sections of the forested embankments of Najafgarh drain are currently classified as and are featured in Protected Forests and Recorded Forests (Notified Forest Areas in Delhi) as "M. P. Green area Najafgarh Drain (Tagore garden)", "Afforestation M.P.Green Area Najafgarh Drain (DDA)" and "Chhawla or Najafgarh drain city forest (29.64 Acre)".[15][16][17][18][19]

Embankment road

There is a well kept drivable inspection road maintained by Irrigation and Flood Control Department of Delhi on one of the drains embankment throughout its entire length of several kilometers running through rural Delhi from Dhansa regulators at the southwest border of Delhi with the state of Haryana to where the drain crosses under the outer ring road at Keshopur bus depot near the Najafgarh road between the housing colonies of Vikaspuri and Tilak Nagar in New Delhi.

Bird-watchers and nature-lovers can view the wildlife and waterbirds occurring on the drain from vehicles by driving on this road and stopping intermittently and going down to the waters edge. As the width of the drain is limited the flocks of waterfowl and other waterbirds in the drain can be easily observed from the drain's edges and this same fact makes the birds much more vulnerable to hunting as they remain in easy reach of the poacher's shotguns and the nets and traps set for them by local villagers and professional trappers.

Recharging, irrigation

The continuous widening of the Najafgarh drain since the 1960s led to the complete draining of the once vast and rich Najafgarh lake, jheel or marsh which directly affected the ground water table in the entire surrounding region as all the rain water after yearly monsoons that used to collect in the vast lake basin in previous years now ran off swiftly through the widened drain into river Yamuna in which it outfalls, this has been affecting the entire climate of the region as well making the region more arid and creating water shortages for the purpose of irrigation or human consumption for the people of Delhi and surrounding regions.

Currently the drain is so wide and deep that it acts as an elongated lake in its own right and can hold and store a lot of rain water which can be regulated through regulators built into it at intervals. Maintaining of proper water-level in the drain and storage of rainwater in it during the summer months leads to recharging of ground water table[20] which the surrounding farmers find much helpful as they access the high water table though tube wells dug on their farmlands though which they pump water to irrigate their crops. Farmers owning farmlands bordering the drain in rural Delhi directly use pipes and hoses to pump water from the drain for irrigation.[21]

Fishing

The relatively cleaner portion of the drain in rural southwest Delhi before it enters densely populated and badly polluted area at Vikaspuri also attracts some small scale local village fishermen, occasionally one can be seen casting his line or net in the waters or floating on a black inflated truck tire tube spreading his fishing net across the breadth of the drain. A fishing license is needed to catch fish legally in Delhi waters.

Water hyacinth overgrowth

The water hyacinth, an introduced invasive species of fast growing floating plants completely clogs the open water surface of the drain in many areas annually and lot of funds and labour is employed by the flood control department to clear it somewhat to keep the water flow uninterrupted. The removing of the water hyacinth by laborers also opens up the water surface for birds and migratory waterfowl that take refuge here every winter.

Covering for development

There is a development scheme in the works where Najafgarh drain will be covered by the Flood Department from Vijay Nagar, Delhi to Hakikat Nagar and on the covered area shops will be built.[22]

Najafgarh lake, marsh or jheel
Main article: Najafgarh lake

Najafgarh lake, Najafgarh marsh or Najafgarh jheel (Jheel in Hindi means a lake) used to be a vast lake in the south west of Delhi in India near the town of Najafgarh from which it takes its name, it was connected to the river Yamuna by a natural shallow nullah or drain called the Najafgarh nullah. However, after the 1960s the Flood Control Department of Delhi kept widening the Najafgarh drain in the pretext of saving Delhi from floods and eventually quickly drained the once huge and ecologically rich Najafgarh lake completely. Rainwater accumulating in the Najafgarh lake or jheel basin had been recorded to have occupied more than 300 square kilometers in many years before its unfortunate draining.

However, with recent advances in ecological understanding it has become clear that draining of this vast lake affected the entire climate of this important region that is India's capital territory and its neighborhood. The draining of the lake completely also caused the watertable in the entire area to go down and the area becoming arid. There have been some plans since to at least resurrect a much smaller lake in the area. Most of the Najafgarh jheel basin lands have increased many folds in their value owing to them coming within Delhi, India's capital territory and are under ownership of farmers who may want to make a fast buck selling them to developers who want to convert the former lake basin into housing complexes as has already been happening with major housing colonies coming up in the region. If Najafgarh drain, which was built to drain the original Najafgarh lake or jheel, ever breaches its wide embankments it will flood these developed lands owing to them spread all over the former low lying jheel or lake basin.

Before draining, a vast lake

Before the unfortunate complete draining of this lake in the 1960s by widening of the Najafgarh drain by the Flood control and irrigation department of Delhi the lake in many years filled up a depression more than 300 square kilometres (120 sq mi) in rural Delhi, It had an extremely rich wetland ecosystem forming a refuge for vast quantities of waterbirds and local wildlife. The lake was one of the last habitats of the famed and endangered Siberian Crane which has all but vanished from the Indian subcontinent now. Till before independence many British colonial Officers and dignitaries came in large parties for waterfowl hunting every season.[23][24][25]

See also

References
  1. Blot across the Capital: Najafgarh most polluted, Sunday, 10 July 2005, The Indian Express
  2. Environment minister raises a stink over Najafgarh jheel, 22 February 2005, The Indian Express
  3. Najafgarh basin Delhi’s most polluted area, 25 Dec 2009, The Indian Express
  4. Najafgarh drain 11th among highly polluted industrial clusters, 25 Dec 2009, The Times of India
  5. Najafgarh drain causes less pollution in Yamuna now Archived 11 July 2006 at the Wayback Machine, 4 July 2006, The Indian Express
  6. Flood Problem due to Sahibi River, Department of Irrigation and Flood Control, Government of NCT of Delhi, India. Website Last Updated : 3 May 2010, A sewage drain is now called the Yamuna, By Sonu Jain, 27 Mar 1999, Indian Express, CRUSADE: Killing Delhi’s Lifeline Archived 4 January 2013 at archive.today, Charu Soni, 19 Aug 2006, New Delhi. Tehelka, Riversutra gone all wrong, By Sunita Narain, 5 Jun 2012, Times of India, ‘Better management in Haryana may solve Delhi’s water problems’, New Delhi, 22 Mar 2012, DHNS, Deccan herald, Sunita Narain bats for sustainable development, Express News Service : Pune, Tue 28 Feb 2012, The Indian Express
  7. Flood Problem due to Sahibi River, Department of Irrigation and Flood Control, Government of NCT of Delhi, India.
  8. URBAN FLOODING AND ITS MANAGEMENT Archived 28 July 2011 at the Wayback Machine,
  9. DTTDC to develop bird sanctuary near Najafgarh Archived 15 April 2013 at the Wayback Machine, 12 January 2003, The Indian Express
  10. Migratory birds are giving Delhi the go-by, 17 January 2010, The Hindu
  11. Najafgarh jheel may chirp again, 20 August 2006, The Indian Express
  12. [A bird sanctuary for Delhi soon, By Nirupama Subramanian, Express News Service, City, New Delhi, 7 March 1988, Indian Express Newspaper]
  13. [Flamingos flock to Capital, By N. Suresh, New Delhi, 7 January 1988, The Times of India]
  14. [Down by the wetlands, on the wild side, Najafgarh drain, By Vivek Menon, 9 March 1991, Weekend, New Delhi, Indian Express Newspaper]
  15. Plantation/Greening of Delhi Archived 26 November 2011 at the Wayback Machine, Department of Environment, Government of NCT of Delhi, India website, "Archived copy" (PDF). Archived from the original (PDF) on 6 October 2011. Retrieved 8 December 2011.{{cite web}}: CS1 maint: archived copy as title (link)
  16. RECORDED FORESTS (NOTIFIED FOREST AREAS IN DELHI), Forest Department, Government of National Capital Territory of Delhi, India,
  17. "Search for Najafgarh drain on Forest Department, Government of NCT of Delhi, India website". Archived from the original on 17 March 2012. Retrieved 1 December 2011.
  18. "Bird sanctuary proposed in Najafgarh" - PROTECTED AREA UPDATE, No. 39 October 2002, Kalpavriksh Archived 5 August 2012 at archive.today
  19. Another city forest opened - Delhi will soon have 32 of them, says Sheila, New Delhi, 29 Jun 2008, The Hindu Newspaper
  20. Groundwater to be recharged at Najafgarh, Mungeshwar drains, by Teena Thacker, New Delhi, 9 March 2007. Archived copy Internet Archive accessed on 4 October 2012
  21. [Delhi tightens belt to cope with drought], PTI, 2 Aug 2002, The Times of India Newspaper
  22. [‘Part of Najafgarh drain to be covered’], by Special Correspondent, New Delhi, 12 September 2009, The Hindu Newspaper. Accessed on 4 October 2012
  23. Najafgarh marsh: "The (Najafgarh) marsh was a favored duck-shoot ground of the British, but was eventually drained out into the Najafgarh Nallah." Strategy Framework for Delhi beyond the Commonwealth Games 2010 Archived 29 October 2013 at the Wayback Machine, BY DANNY CHERIAN, 2004
  24. [A Guide to the Birds of the Delhi Area (1975) by Usha Ganguli, a member of the Delhi Birdwatching Society.]
  25. [Birdwatching Articles from 1961-70 from Najafgarh lake by Usha Ganguli in "Newsletter for Birdwatchers" edited by Zafar Futehally]

Further reading

28°31′N 76°36′E

This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.