BWSSB presentation, Dec 6 2009

Dec 6 – 2009 Water Workshop

Presentation was made by BWSSB : http://www.slideshare.net/sanban14/bangalores-water-supply-situation-bwssb

Content Partner – Rainwater Club, the Media Partner – CitizenMatters and the Bangalore Water Supply and Sewerage Board (BWSSB).

Bangalore’s Water Supply situation - BWSSB - Presentation Transcript

1. Presentation by BWSSB
2. Bangalore Water Supply and Sewerage Board
   • A statutory organization set up in 1964 under the BWSSB Act whose core functions & responsibilities include :
   • Providing water supply & sewerage network and sewage disposal systems
   • Ensuring sufficient of domestic water supply to the required standards.
   • Levying & collecting water/sanitation charges on a no loss/no profit basis.
   • BWSSB’s jurisdiction covers the Bangalore Metropolitan Area (1306 Sq. Kms out of which 455 Sq.Km is Green Belt)
   • BMRDA area is 8005 Sq. Kms.
3. Population as per 2001 Censes : 53,79,000 Population as on 2005 (As per BDA) : 62,95,000 Population as on 2025 : 94,28,000 (Projected using Graphical Method) Area : Bangalore Area and Population Sl. No. Boundaries Sq. Km. 1 BMA 1275 2 CDP 594 3 Core Area Sewerage Catchments (BMP Area) 229 4
   • Peripheral Drainage Zones (8 Nos)
   • CMC ’ s, TMC Area - 248 Sq.Km
   • Village Panchayaths – 117 Sq.Km
   365
4. Source of Water Supply
5. PLAN SHOWING THREE SOURCES OF WATER SUPPLY TO BANGALORE CITY WATER RESOURCES TO BANGALORE CITY HESSARGHATA CHAMRAJA SAGAR CAUVERY WATER PLANT
6. About Bangalore water supply 1890-1900 1896- Hesargatta WSS – untreated water 1900-1930 Hesargatta – Combined jewel filters 1930-1940 T G Halli Arkavathi WSS-27 MLD 1950-1960 1952-T G Halli – 45 MLD added 1960-1970 1964 – T G Halli – 135 MLD 1970-1980 1974 – CWSS I Stage – 135 MLD 1980-1990 1882- CWSS Stage II – 135 MLD 1990-2000 1993- CWSS Stage III – 270 MLD 2000-2010 2010-2020 2002 – CWSS Stage IV phase I -270 MLD Proposed CWSS Stage IV Phase II – 500 MLD
7. Built in 1896 Hessarghatta Lake
8. Chamaraja Sagar Reservoir Built in 1933
9. Water Treatment Plant at T.G.Halli Built in 1933
10. Present Water Supply Projects Year of commissioning Installed Capacity (MLD) Present Supply (MLD) Arkavathy (TG Halli) 1933 149 60 Cauvery Stage I 1974 135 135 Cauvery Stage II 1983 135 135 Cauvery Stage III 1993 270 300 Cauvery Stage IV, Phase – I 2002 270 270 Total Supply 959 900
11. CAUVERY RIVER - SHIVA ANICUT WATER RESOURCES TO BANGALORE CITY
12. Intake Gate at NBR
13. Filter House at T.K.Halli
14. Pump House at T.K.Halli
15. CWSS - III Stage Pump House
16. Pipe Lines
17. Present Water Supply Scenario
    • Service Area : 800.29 SqKm
    • Population as on 2008 : 7.5Million
    • Present Demand : 1125 MLD
    • Present Supply : 900 MLD
    • The Per Capita Supply : 110 to 120 ltrs
    • Water allocation from Cauvery : 19 TMC
    • Already utilised : 12 TMC
    • Complete utilisation by : 2012-13
18. ALTERNATIVE SOURSES
    • Recycle and reuse of wastewater for non potable uses
    • Dual piping system in all new layouts
    • Rain water harvesting
    • Restoration of lakes to improve ground water table
19. • City Distribution System:
    • The city has about 5638 kms of distribution network ranging from 50 mm to 600 mm dia.
    • Rechlorination is done at city reservoirs to maintain residual chlorine of 0.2ppm at consumer end.
    • Chlorine plants installed in the city - 46 Nos
20. • City Distribution System:
    • The city has about 5638 kms of distribution network ranging from 50 mm to 600 mm dia.
    • Rechlorination is done at city reservoirs to maintain residual chlorine of 0.2ppm at consumer end.
    • Chlorine plants installed in the city - 46 Nos
21. WATER QUALITY MANAGEMENT
    • Testing physical, chemical and bacteriological parameters of raw water and treated water at treatment plants.
    • Testing samples from distribution system in the city.
    • More than 60 water samples are collected every day from the distribution system and tested.
    • Two mobile labs with portable testing kit collect samples from the city distribution system every day.
22. Customer friendly initiatives
    • Advanced Interactive Voice Response System for booking complaints is functional.(155313)
    • Electronic Clearance System is introduced.
    • Customer Charter launched.
    • e-Tendering
    • Informative Website in position.
    • (www.bwssb.org)
23. • Customer friendly initiatives
    • Total No. of KIOSK installed – 74 Nos
    • 24x7 multi-utility fully automated Water bill payment KIOSK KaverEcom - with facilities for collecting cash, cheques and DDs is in operaton.
24. KaverEcom Customer friendly initiatives
25. GEOGRAPHICAL INFORMATION SYSTEM (GIS)
    • All the information of water and sewerage pipeline network, and all other assets of BWSSB has been incorporated in GIS.
    • It is going to become a major tool for the management of the entire water supply and sanitation system, including revenue billing.
26. SERVICE TO URBAN POOR
    • 10% of the urban population are living in slums
    • Water for these slums is supplied through public taps free of cost
    • Few slums are provided with individual connections which are exempted from access charges except for Rs. 550 towards meter cost
    • The lowest tariff adopted is Rs.6/KL
27. Initiatives
    • Unaccounted for water – Pilot project completed in central part of Bangalore.
    • Setting of Recycling and Reuse of Waste water for potable purpose.
    • Rain water harvesting to meet demand in domestic and industrial buildings.
    • Dual pipe supply of Potable and Non-Potable water in New layouts.
28. Improving Accountability
    • Installation of bulk flow meters on feeder mains in the city
    • Hand held terminals for spot meter reading
    • Installation of SCADA to all the main valves, controlling point at Cauvery Bhavan
29. Future Water Supply
    • Projected Population by 2011 : 7.34 MILLION
    • Future Demand : 1576 MLD
    • Present Supply : 900 MLD
    • Deficit : 676 MLD
    Proposals: Augmentation in Phase I : 100 MLD Phase – II Project : 500 MLD Total Supply After Phase-II Project : 1500 MLD
30. • Augmenting Water Supply to Bangalore City by 270 Million Liters Per Day
    • Project Started during January 1997
    • Water Components Commissioned during July 2002
    • Sewerage Components Completed Except 0.90 Kms Trunk Sewer Works out of 54 Km – completion by September 2006
    • Expenditure as on MAY 2006 – Rs. 1332.07 Crores
    Cauvery Stage – IV Phase - 1
31. Bangalore Water Supply & Sewerage Project Stage – IV, Phase – II
    • Objective of the Project is to Augment Water Supply by 500 MLD
    • To provide Sewerage System & Treatment Facility in the peripheral areas of Bangalore city
    • Distribution improvement (UFW)
    • Slum development, e-governance and HRD
32. • Cost Rs. 1759 Crores
    • Implementation period from 2005 – 06 to 2011 – 2012
    • Raw Water Transmission : 6.2 km – 2600 mm & 9.6 km – 2200 mm
    • Water Treatment Plant (WTP) of 500 Mld
    • Clear Water Pumping Stations : 3 Stages of 14 nos. each to pump 500 Mld of water
    • Clear water transmission system : WTP to City about 68 Kms - 2700 mm
    • Trunk mains to ground level service reservoirs in city 115 kms
    • Supervisory control and data acquisition system (SCADA)
    Water Supply Component Bangalore Water Supply & Sewerage Project Stage – IV, Phase – II
33. Total Estimated Cost of Project Items Amount (Rs. Crores) Water Supply Component 1415 Sewerage Component 667 Distribution Improvement Component 249 Management Improvement 25 Slum Development 49 Price Escalation 184 Physical Contingencies 123 Interest During Construction 119 Sub-Total – JBIC Financed Portion 2831 Land Acquisition 61 Administration 202 Taxes and Duties 290 Total Project Cost 3384
34. Funding For the Phase-2 Project The total estimated cost for the Project is shown below.
    • Total Estimated Cost of the Project – Rs.3384 Crores
    • JBIC Portion – Rs. 2831 Crores
    • BWSSB/GoK Portion – Rs. 553 Crores
35. Bangalore Sanitation
    • Bangalore is blessed with undulated terrain having natural gradient
    • Wastewater generated flows out of the city in all the four directions
    • Wastewater generated is collected and conveyed through the sewerage network to the treatment plants for treatment up to Secondary level and disposed to the natural course
    • BWSSB has setup 12 treatment plants of secondary level of various capacities all-round the city – 718 MLD Capacity
    • Two Tertiary treatment plants of total capacity 70 MLD has been established and treated water is reused for non potable purposes
36. About Bangalore sanitary system 1920-1950 Sewerage system existed 1950-1960 Major sewerage system constructed 1970-1980 K & C Valley wastewater treatment plant ( Primary) & V- Valley STP (Primary) 1980-2000 K & C and V Valley and Hebbal upgraded to secondary 2000-2010 CWSS Stage IV Phase I – 7 treatment plants & sewerage system
37. Core Area Sewerage Net work Major Valleys 1 – K & C Valley 2 – V Valley 3 – Hebbal Valley # # # % % % % % H e b b a l V a l l e y A r k a v a t h i V a l l e y V r i s h b h a v a t h i V a l l e y C h a l l a g h a t t a V a l l e y K o r a m a n g a l a V a l l e y T a v a r a k e r e V a l l e y K a t r i g u p p e V a l l e y H e b b a l M i n o r V a l l e y - 1 H e b b a l M i n o r V a l l e y - 2 A g a r a m S P S V - V a l l e y S T P
    • M
    a d i v a l a M i n i - S T P K & C V a l l e y S T P K e m p a m b u d h i M i n i - S T P
    • H
    e b b a l V a l l e y S T P ( 3 8 ) ( 3 6 ) ( 3 5 ) A r e a i n S q . K m . ( 3 2 ) ( 3 1 ) ( 1 9 ) ( 1 6 ) ( 6 ) ( 1 1 ) ( 5 ) K - M i n o r V a l l e y T o M a i l a s a n d r a S T P T o R a j a C a n a l S T P B e l l a n d u r L a k e $ Major and Minor Valleys Area in Sq Kms Hebbal 48 Challaghatta 36 Koramangala 37 Taverekere 19 Kathariguppe 16 Vrishabhavathi 38 Arkavathi 35 Total 229
38. Abstract of sewer statistics >400mm Core Area Sewers less than 400 mm dia Length – 3367 KMs Number of Manholes – 1,21,364 Zones Total Length in Km Existing inside SWD in Km No of manholes in Nos Hebbal 45 9 1650 K&C 113 35 2857 V Valley 85 18 1746 Total 243 62 6253
39. Locations of existing STP`s Yelahanka TTP Jakkur STP Hebbal STP KR Puram STP Kadabeesanahalli STP K & C Valley STP Madiwala STP Kempambudhi STP Mylasandra STP V Valley STP & TTP Nagasandra STP Rajacanal STP
40. Wastewater Treatment Plants Sl. No. Location Capacity in MLD Treatment Facility Under CWSS I, II, III stages 1. Vrishabhavathi Valley 180 Secondary – Trickling filters 2. K & C Valley I 163 Secondary: Activated sludge process 3. Hebbal Valley 60 Secondary: Activated sludge process 4. Madivala 04 Secondary: UASB + oxidation ponds+ constructed wetlands 5. Kempambudhi 01 Secondary: extended Aeration 6. Yelahanka 10 Activated sludge process + filtration+ chlorination (Tertiary)
41. Wastewater Treatment Plants Note : V. Valley 60 MLD Tertiary treatment plant is fed by 180 MLD STP Under CWSS Stage IV Phase I Sl. No. Location Capacity in MLD Treatment Facility 1. Mylasandra 75 Secondary – Extended aeration 2. Nagasandra 20 Secondary -Extended aeration 3. Jakkur 10 Secondary – UASB +Extended aeration 4. K. R. Puram 20 Secondary – UASB +Extended aeration 5. Kadabeesanahalli 50 Secondary-Extended aeration 6. K & C Valley II 30 Secondary - Extended aeration 7. K & C Valley III 55 Secondary – CMAS 8. Rajacanal 40 Secondary- Extended aeration Grand Total 718
42. Wastewater Treatment Plants Raw sewage characteristics Raw sewage BOD : Average 350 mg/lit Raw sewage suspended solids: Average 400-500 mg/lit Treated effluent standards ( Secondary) Treated effluent BOD : < 20 mg/lit Treated effluent suspended solids : < 30 mg/lit Tertiary standards Treated effluent BOD : < 5 mg/lit Treated effluent suspended solids : < 5 mg/lit Coliforms : < 2.2/100ml
43. – Diffused Aeration System
44. – Diffused Aeration System
45. – Diffused Aeration System
46. – Effluent quality
47. – Effluent Quality
48. Effluent Quality
49. V. Valley Sewage treatment Plant - Recycling Plant
50. V. Valley Sewage treatment Plant - Recycling Plant
51. V. Valley Sewage treatment Plant - Recycling Plant
52. VIEW OF V. VALLEY TERTIARY TREATMENT PLANT
53. YELAHANKA Tertiary Treatment plant (Conventional ASP followed with filtration by Chlorination)
54. WATER SUPPLY TO APARTMENTS
    • Housing complexes having more than 50 apartment ,
    • _ Dual piping system is mandatory
    • _ STP is mandatory
    • _ RWH is mandatory
    • GBWAS Charges in CMC areas,
    • _ 0 to 600 Sft-----Rs.4000/-
    • _ 600 to 1200 -----Rs. 8000/-
    • _ 1200 to 2400 -----Rs.16000/-
    • _ 2400 and above ---- Rs.24000/-
    • Prorata charges ---- Rs.200/- Sft
55. Rain Water Harvesting
    • Mandatory for all existing buildings on
    • 40 X 60
    • Mandatory for all new buildings on
    • 30 X 40 and above
56. THANK YOU
57. Population in BBMP Area Year Population in Lakhs Water Demand in MLD Water supply in MLD Short fall in MLD 2001 53.79 870 540 330 2007 75.00 1219 870 349 2015 88.00 1720 1470 250 2021 100.00 2125 1470 655 2036 125.00 2550 1470 1080