DESCRIPTION OF THE TAJPUR PAHADI LAKE
Common Name: “Tajpur Pahari Khaan”
Co-ordinates: 28º29’56”N 77º18’29”E
Location: Tajpur Pahadi, Jaitpur Road, Badarpur. New Delhi
Landmark: CISF, Badarpur Thermal Power Station, Delhi.
Pin: 110 044
The area is under “Municipal Corporation of Delhi”. The place was actually a stone quarry from which it derived its name ‘Khaan’. The area situated just beside the “Badarpur Thermal Power Station” was used extensively for extracting stones until the underground water came out. The area was then left as it was since 70’s. Gradually the place turned into a very deep lake with accumulation of more rain water, underground and some local sewage. The total area of the place is approximately 30 acres (actually 45 acres, but encroachment has occurred). With time the lake became a habitat of many aquatic animals like waterfowls, damselflies, fishes etc. Till now no-one had studied the waterbody and there is not single written information about its biodiversity. The lake is now at verge of vanishing because of developmental projects undertaken by as the Municipal corporation. The water is being extracted land filling is being done for the last 2 years. The lake is now surviving through several small shallow ponds and puddles which are the only niche to the aquatic animals which once used to occur in the lake. It is suspected that the lake will be permanently extinct within few months.
Another disadvantage that may rise will be sinking of the water table. The lake served as groundwater recharging site. Till now, a lots of working hand-pumps are seen in the adjoining areas. Its been feared by the ecologists that the water table in the area will be greatly affected. Delhi's ground-water level has gone down by about eight meters in the last 20 years at the rate of about a foot a year.
The groundwater table in Delhi has depleted to 20 –30 metres in various areas across the city. Compared to a level of 30 – 40 feet at the time of Independence, the water table has dropped to 350 feet at certain places. It is said to be falling at 10 feet per year on an average.
Water color- straw color, but clear in appearance, since last few months due to loering of water depth macrophytes has turned its surface green.
Trophic staus-
The lake is divided into 2 parts. The 2 parts (right and left, see the picture below) of the lake was much different in perspective of its trophic staus
While the left side in the following picture is heavily polluted because of the adjoing slum dischargibg its all sewage into it, the right side of the lake at the December month of 2007 is far better than that with signs of good healthy water ecosystem as the main source of its water is rain and underground water..
Water depth- at present its around 2 feet. But earlier it was very deep (several vehicles were also reported to drown in the lake earlier from the adjoining road)
Biodiversity-
As on December, 2007 at the time we get there we saw many migratory birds , cranes, as many as 90-100 water fowls swimming. We were able to see atleast 6 different types of damselfly and many aquatic insects were easily recognized.
Some local boys were catching fishes using a thread and some bet. This fact indicates that a healthy fish population exists. On asking them about the bird population, they said that earlier the lake was full of birds as there was no human disturbance, but now they seldom come since past few months.
Dr. Ram Kumar and his student from Acharya Narendra Dev College of Delhi University are doing a regular study of this lake since last 9 months and they have a good data about the zooplankton diversity in the lake which they achieved by doing a rigorous research on the soil sediments in the laboratory.
