AREA: 1618.7440000000001 Sq.mtrs    ZONE: 2    DIVISION: 17

This pond is located in Division 17 of Zone  2 and is on the Madhavaram - Redhills Road. It is located to the North of the road. The Vadaperumbakkam Community Hall is located by the side of the pond. Also a small temple  Selliamman temple - is located by the side of pond. The pond is located at North Latitude 1310'33.83" and East Longitude 8012'53.50".

The pond is roughly rectangular in shape. There is no water in the pond during the time of survey. The pond is provided with revetment all around, with a toe wall at its base and is also provided with steps for easy entry and exit. The revetment on the road side ie., on the southern side of the pond has sunk. At present, there is no specific catchment to the pond but for its own in-situ catchment. The area around the pond is urbanized. There is no inlet or outlet to the pond provided. Based on the interaction with the local community, it is inferred that the pond used to hold water for about 9-10 months in the past, whereas now it holds only for 3  4 months in a year. In the past, the pond water was used for washing and bathing by the local community and at present also it is used for washing purposes. One of the major advantages of this pond is that it is not polluted neither by solid waste dumping nor domestic liquid waste diversion but for the wash water from the nearby static tank that gets diverted into the pond which is minimal in quantity. The quality of stored water during monsoon is reported to be good and fit for domestic washing. There is no weed infestation found in the water spread area. There is a static tank provided on the bund used for CMWSSB water supply. The water is used for washing purpose by the local community. The wash water enters into the pond and gets percolated.

But for the sinking of the revetment in the northern side, the overall condition of the bund appears to be good. Based on the interaction with the local community, it is understood that no major water logging observed near the pond but for the northern side wherein the rainwater along with grey water gets stagnated for a couple of days during monsoon. There is no storm water drain available nearby.

There is one borewell drilled on the northern side of the bund by TWAD board for water supply. Encroachment has just started on the northern side of the bund as could be seen from the picture. Based on the Total Station Survey output, it is inferred that the total area of the pond is 1793.391 sq.m and the total length of the bund is 160.975m. The average depth of the pond is about 4.5m.

The actual volume stored in the tank during 1987 during a normal rainfall year - after losses due to evaporation and recharge is given in the following Graph.

Based on this estimate, there will be water available in the pond for 308 days. At no point of time, the pond overflows in a normal rainfall year. The total inflow to the tank in a normal rainfall year is estimated at 2882.14 cu.m; the total groundwater recharge will be 1847.19 cu.m. The same estimate was made in an excess rainfall year to see the inflow and outflow status. During 2005, the total rainy days was about 98; in about 48 days the rainfall is more than 10mm. The actual volume stored in the tank after losses due to evaporation and recharge is given in the following graph.

The pond in its present volume does not over flows even in an excess rainfall period for the assumed catchment. The total inflow to the tank in an excess normal rainfall year is estimated at 6048.50 cu.m; the total groundwater recharge is 2080.3 cu.m.

Based on the field observations and inferences, followed by the data analysis, following were the list of activities proposed for renovating the Pond.

• To start with, the pond can be desilted and cleaned in the water spread area. 
  
• The bund need to be trimmed, strengthened; 
  
• Revetment need to be reworked in the Southern side of the pond.
  
• Bush clearance all around the pond and provision of a pathway all around the pond to a width of  2m and properly fenced.
  
• The roof top down take pipes from the Community hall can be interconnected  and diverted to the pond.
  
• Also the surface run off from the road and the open space in front of the community hall can also be diverted into the pond through a filter chamber
• A recharge well of 1.2m in diameter to a depth of 3m can be provided in the pond to facilitate groundwater recharge.