Tuesday, November 19, 2013

Pune City :- Water Supply And Drainage System Study (Republish)

Standing on 11th floor balcony in Nanded City,  I was watching construction of Water Tower, It got my brain ticking about the why they do build Water towers and How do they work?

I did research on internet about it and got the Answers, then next question was how many water towers are there in Pune. Are they enough for satisfying the need of water supply of the City which is growing at fast pace?

While Searching for it on google, I came across this informative report published on ICRIER website. On further looking at ICRIER who was publisher of this report, I found that it stands for Indian Council for Research on International Economic Relations. 
I  guess this report was created as a part of assignment, somebody really did good work. 


Report is in PDF and may not be readable on all the devices, so I am just reproducing it as it. My fear is in overhaul of website this valuable piece of research may get lost. This reports seems to be done in 2006.
Original link to PDF is here. Download Full & Original Report



Projected Population of Pune City




Raw Water Sources for Pune City



 

Water Supply

WATER SOURCES 
The city of Pune draws water from the following surface sources :-
  • Khadkawasla Dam
  • Panshet Dam
  • Warasgaon Dam
  • Temghar Dam
The Total live storage of all the 4 Dams is around 30 TMC. The Todal water supplied to the city is around 14.5 TMC (1250 MLD). Around 70% of the total requirement of the city is fulfilled throught closed conduit of 3000mm Diameter, 30% of the total requirement of the city is fulfilled through open Canal

Water Allocation

As per the agreement between Pune Munciple Corporation and State Irrigation Department, The city has been allocated 11.50 TMC (900MLD) of water Annually against which the city consumes around 14.5 TMC(1250MLD) of water, considering the growth of the city, PMC has approached the State irrigation dept for increasing the water allocation for city's drinking purposes to 19 TMC (1500 MLD).

Water Supply in the City


PMC draws from Khadakwasla dam through
  • 3000 mm MS Gravity main
  • Mutha right bank canal
  • Population city is 3.8 million
  • Daily supply to city is 1222 MLD
  • Gross per capita supply 321 lpcd
  • As per PMC data, actual supply is 866 MLD or 228 lpcd
  • Overall sewage generation can be estimated to be 728 MLD
  • Per capita supply as per norms 150 lpcd



Warje WTP

City Water Distribution System

56 Storage Reservoirs with a total storage capacity of 400 ML i.e. 30% of the daily demand. A network of around 2500 kms. The pipe sizes in the water supply system vary from 80 mm to 3000mm.

Problems in water distribution
  1. Undulated topography of the city (Sauccer shape)
  2. Unplanned distribution network
  3. Old distribution network

Scope of work for Consultant

  • Collection of information regarding water supply from water supply department 
  • Carry out hydraulic analysis of the existing water supply distribution network
  • Preparation of DMA's lead detection studies and Quantification of leakage in the system
  • Preparation of remodelling  plan to bring leakage to less than 15%.
  • Preparation of estimates for equitable water supply across the city.
  • Submission of detailed project report to financing agency.





  • Preparation of Tender Documents.
  • Completing the tendering process and selection of contractors for execution of works. 
  • Supervision of works as project management consultants. 
  • Carryout public awareness camps. 
  • Supervise the works as consultants during the operation and maintenance period of the contractor.  
  • Train the engineers from PMC for network analysis, lead detection SCADA etc. 

     

Progress of work in Equitable Water Supply Project

  • Collection of Information regarding water supply from water supply dept

  • Carry out hydraulic analysis of all the water supply zones of the existing water supply distribution network
  • Preparation of DMA's for the city (Total 327 DMA's) 
  • Finalisation of report regarding 100% meterisation across the city
  • Finalisation of scope of work for 5 DMA's which are to be taken up for implementation as pilot study shortly.
  • Preparation of detailed project report as per guidelines of JNNURM is in progress


Ambitious Ongoing Projects for Future

  • Equitable water supply scheme for the city
  • Laying closed conduit of 2500 mm diameter from khadakwasla Dam to parvati water works to avoid uptake from open canal
  • Construction of 200 MLD water treatment plant at warje water works.
  • laying closed conduit of 1600 mm diameter from Khadakwasla  dam to Warje Water works. 
  • Construction of 5 service reservoires

Projects in Pipeline

  • Construction of 500 MLD capacity WTP at Parvati Water
  • Construction of 300 MLD capacity WTP at Cantonment
  • Construction of 250 MLD capacity WTP Vadgaon
  • Implementation of Equitable water supply scheme
  • Construction of Jackwell on the upstream of Khadakwasla dam
  • Construction of tunnel for conveying water from parvati water works to Cantonment water works.
  • Development of new source at bhama-askhed, water treatment plant of 200 MLD capacity, construction of new reservoirs, development of distribution system etc. 

Facts about Water Supply and Sewage Generation in Pune City

 




Objective of the assignment

    1. To design a project to collect and treat 100% sewage generated in the city of Pune  

    2. To present the project under NRCD to seek the funding.

       

       




    Key problems for ensuring 100% collection and treatment of sewage  

    • High rate of water supply resulting in higher sewage flows
    • Inadequate / old conveyance or transmission lines causing sewage to flow in Nallas
    • Problems with the collection system (unconnected areas, leaking main lines etc)
    • Treatment capacity some existing plants inefficient
    • Space availability at the right locations for sewage treatment
    • Sewage flow Insufficients from upstream outskirts of the city 

 Steps Involved

  • Prepare base map and define drainage districts
  • Collection of data for existing water supply, sewage network and treatment capacity
  • Carryout detailed ward-wise population projections
  • Estimation of drainage district-wise sewage flows
  • Analyse gaps in collection system (conveyance mains and transmission mains)
  • Analyse gaps in treatment capacity
  • Design for new infrastructure and improvements
  • Cost estimation 


COMPONENTS INCLUDED IN DPR

  • Collection system in Balewadi area ( 43Km)
  • Trunk mains & Conveyance mains (12Nos, 46.03Km)
  • STP’s for 100% treatment of sewage generated by city up to year 2044
  • (Financial provision for 2024) – 10 STP’s, 383MLD
  • Up-gradation of 2 Intermediate Pumping stations
  • Capacity Building
 

INITIATIVES TAKEN BY PMC

  1. PMC has made necessary modificatino in the building control rules and has made it mandatory for all housing schemes to have STPs & reuse the treated sewage for flushing, gardening etc.
  2. PMC had started implementing a scheme of recycling 500 MLD treated sewage for irrigation 
  3. PMC has made it mandatory to implement rain water harvesting in all new upcoming housing schemes.
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