5.1. The Master Plan updated in 1991 was revised in August 1997 based on the updated water requirement and water allocation for each beneficiary as per the actual census figure of 1991. The updated (1996-97) water requirement and water allocation for each beneficiary were assessed as follows:
Area | Water requirement (in MLD) | Water allocation (in MLD) | ||
2001 | 2021 | Krishna Stage I | Krishna Stage II | |
1. Chennai City | 710 | 942 | 525 | 760 |
2. Spl. Industries in Manali | 170 | 330 | 140 | 300 |
3. Adjacent Urbanised Areas | 333 | 511 | 130 | 228 |
4. Distant Urbanised Areas | 114 | 197 | 32* | 69 |
Total | 1327 | 1980 | 827 | 1357 |
* From Local Sources
5.2. As per the Revised Master Plan proposals, Chennai City water distribution system has been divided into 16 Zones. For this, 12 Water distribution stations were newly constructed and improvements to the 11 water distribution systems were completed. Leak detection and rectification works were carried out as water conservation measures by replacing the old and choked up water mains for a length of about 585 km. and 1.95 lakh house service connections were renewed. Transmission mains for a length of 36 km. were laid to convey water to various water distribution stations. The Kilpauk water treatment plant has been refurbished for treating 270 million litres of water daily. Also, bulk meters were fixed in the water treatment plants and water distribution stations.
Geographical Information System (GIS) was developed in a pilot area. Information System Technology Planning (ISTP) was implemented as a pilot project. A detailed study on the potential of Araniar-Kosathalaiyar River Basin for the extraction of ground water has been carried out during 2002-2004 and assessed that 100 mcm per year during normal years and 70 mcm per year during drought years can be extracted from these aquifers. These 16 Water Distribution Zones are provided with a separate water distribution station which is fed by a dedicated transmission main from the treatment plant.