REHABILITATION AND REMODELLING OF WATER SUPPLY AND SEWERAGE SYSTEM IN BANGALORE CITY

Bangalore is located on the watershed of 2 River basins, Arkavathy to the West and
South Pennar River to the East.

The Water supply distribution system of the city is existing since 1896 and is
being remodelled from time to time depending upon the development of
Metropolitan areas. The distribution network in the central parts of the city is very old
due to which water supply to these areas is not satisfactory. The old inner city areas
of Bangalore consisting of 250 Sq. Kms have got the following problems of water
supply and Sewerage system


The present water supply and sewerage system is outdated and some of these
facilities are already overloaded
Almost 30% of water supply distribution pipes have been encrusted with scales.
Hence it was proposed to review and update for improvement of water supply
sewerage system in Bangalore City including formulation of its program and identification
of the priority projects.

The project will be taken up in 2 phases. Phase I includes a review and update of
the previous improvement plan of water supply and sewerage system and preparation of
a program and identification of priority projects. Phase II includes, feasibility study for
the projects identified in phase I, preparation of detailed project reports including
financial viability of the projects.

The rehabilitation Replacement of water supply system includes:

a) Study of roughness co-efficient of pipelines (C Value)

b) Rehabilitation of old pipes.

c) Replacement of old and corroded lines.

d) Replacement of old defective meters.

e) Insulation of flow meters.

f) Rehabilitation of old Ground level Reservoirs

g) Rehabilitation of CWSS I & II stage treatment plants.

h) Rehabilitation of pumps and motors and accessories.

The rehabilitation / replacement of sewerage system includes:

a) Conducting close circuit television (CCTV) survey of the old city area, lateral
sub-mains and outfall sewers to diagnose the condition of sewers.

b) Rehabilitation of existing sewers.

c) Rehabilitation of existing sewer plants.

d) Rehabilitation of outfall sewers.

After completion of detailed project report including Financial viability the work will be
taken up. The approximate cost of the proposed project will be around Rs.800 Crores.