2. Bangalore Valley System
Well defined valleys
– 4 Major valleys
Koramangala
Challaghatta
Hebbal
Vrishabhavathi
– Minor valleys
Arkavathi, Kathriguppe and Kethamaranahalli
(Vrishabhavathi Valley)
Taverekere (Koramangala valley)
4. Un planned growth of city
Un sewered pockets such as slums and erstwhile CMC areas
Damage of main sewers
Blockages and overflows in the sewer system
Direct letting out of raw wastewater into storm water
drainage system from un-sewered as well as sewered pockets
Lack of adequate infrastructure facilities
Dumping of solid waste within the drainage zones
Reasons for pollution of Lakes
5. Sewerage management in Bangalore
Facts
Total sewage generated in Bangalore – 1000 MLD
Sewerage connections – 8 Lakh
Sewerage network
Laterals (< 300 mm dia) – 3367 Kms
Trunk Sewers (>300 mm dia) – 302 Kms
Number of plants – 14
Sewage treatment capacity – 721 MLD
Average Present treatment – 453 MLD
6. Measures for abating Lake Pollution
1) Replacement/ Rehabilitation/ Up gradation of
old sewerage net work – Laterals and Trunk
sewers in core city
2) Creation of New Sewerage Net Work
Erstwhile CMC area – 2300 Kms
110 Villages – 2000 Kms
Total – 4300 Kms
3) Creation of Additional Treatment capacity to
treat wastewater produced in the new areas
7. Environmental Action Plan – A
Replacement and Rehabilitation of existing
sewers
Total length – 33 Kms
Cost – Rs. 47 Crores under NRCP
Work is completed
On going projects
8. On going projects
Environmental Action Plan – B
Replacement and Rehabilitation of existing
sewers
Total length – 70 Kms
Taken up under 8 packages
Cost – Rs. 176 Crores under JnNURM & JICA
Project period 2010-2013
9. On going projects
Zero Flow in Hebbal drainage zone
Length – 19 Kms
Taken up under 3 packages
Cost – Rs. 35 Crores under BWSSB funds
& Mega city funds
Project period 2010-2013
10. On going projects
Providing UGD Facilities to 8 ULBs in BBMP area
• Estimated Cost : Rs. 1098.15 Crore
• Amount put to bid : Rs. 966.21 Crore
• Awarded Cost : Rs. 1191.79 Crore
• Funding : JnNURM - World Bank
• Project Period : 4 Years
• Length of pipeline to be laid : 2300 Kms
• Number of packages : 24
12. Construction of new treatment plants
11 Numbers under JICA assistance
339 MLD Capacity with nutrient removal treatment process
300 MLD plant at V Valley at a cost of Rs. 396 Crore
Environmental Action Plan – C
Cost – Rs. 360 Crores
Length – 109 Kms
Water supply and Sanitation to 110 Villages
Awaiting clearance from Central Government
Future projects
13. Treatment plants proposed under CWSS Stage IV Phase II
Name Capacity in MLD Process (Including BNR)
Raja Canal 40 Extended Aeration (EA)
Horamavu Agara 20 Sequential Batch Reactor (SBR)
Nagasandra 20 SBR
Chikkabanavara 5 SBR
Kadugodi 6 SBR
Kachohalli 3 Membrane Bio – Reactor
Kengeri 60 Activated Sludge Process (ASP)
K & C Valley 60 ASP
Bellandur Amanikere 90 ASP
Doddabele 20 SBR
Yellemallappa Chetty Kere 15 SBR
Total 339
14. Month
Average daily inflow in ML
2006 2007 2008 2009 2010 2011 2012
January 198.89 246.07 210.01 307.00 303.28 271.98 259.98
February 233.55 247.32 216.15 316.33 318.15 251.02 277.56
March 236.92 234.59 264.28 313.87 330.55 261.97 275.28
April 269.88 264.22 305.91 277.75 276.15 274.92 270.90
May 310.17 276.99 294.20 251.55 323.67 251.50 249.71
June 224.34 299.24 304.44 244.93 307.66 279.12 285.55
July 245.12 289.05 278.76 236.87 308.70 304.51 356.58
August 253.33 327.73 301.85 275.66 306.78 285.22 354.27
September 295.74 268.33 257.06 292.62 285.64 252.68 356.13
October 301.31 247.88 261.78 271.95 297.04 304.74 383.27
November 288.76 238.10 264.39 265.12 301.92 309.28 379.74
December 245.59 217.67 303.05 269.91 275.20 249.00 384.29
Average 258.72 263.18 272.75 276.72 302.88 274.81 320.50
Quantity of used water treated in
the existing treatment plants
15. Monthly Average inflow to treatment plants in MLD
Treatment Plant and capacity January-13 February-13 March-13
V Valley 180 MLD 68.17 67.18 74.45
Mailasandra 75 MLD 47.14 48.99 52.58
Nagasandra 20 MLD 7.24 5.68 7.34
Hebbal 60 MLD STP 18.25 34.16 34.16
Yelahanka 10 MLD STP 4.28 5.21 5.51
Jakkur 10 MLD STP 4.44 4.70 4.91
Raja Canal 40 MLD STP 19.00 28.04 39.35
K R Purum 20 MLD STP 9.89 12.38 12.18
Kadabeesanahalli 50 MLD 27.44 36.43 36.12
K & C Valley 218 MLD 144.85 148.09 149.64
K & C Valley 30 MLD 28.89 28.81 30.27
Lal Bagh 1.50 MLD 1.20 1.08 1.08
Cubbon Park 1.50 MLD 1.06 1.25 0.85
Madivala 4 MLD 3.79 3.79 3.79
Kempambudhi 1 MLD 1.00 1.00 1.00
Total - 721 MLD 386.64 426.76 453.22
16. Benefits after the completion of UGD works under KMRP
Erstwhile ULB Name of the Lake No. of
lakes
Yelahanka Attur, Puttenahalli, Yelahanka,
Allalasandra, Jakkur, Shivanahalli
6
Bytarayanpura Chikkabanavara, Singapura,
Abbegeri, Vidrayanapura,
Doddabommasandra, Tindlu,
Hebbal, Nagavara, Jakkur,
Rachenahalli, Amruthahalli,
Hennur, Byrathikhane, Kalkere,
Rampura
15
17. Erstwhile
ULB
Name of the Lake No. of
lakes
Mahadeva
pura & K R
Purum
Munekollal, Sadaramangala,
Bhattrahalli, Vengeankere,
Ramamurthy Nagar, Basavapura,
Yellemallappa Chetty, Kaggadasapura,
Vibhuthipura, Varthur,
Mahadevapura, Ganghadhar,
Doddakundenahalli, Kundenahalli,
Rajupallya, Benniganahalli, Sigehalli,
Siddapura
18
Benefits after the completion of UGD works under KMRP
18. Erstwhile
ULB
Name of the Lake No. of
lakes
Bommana
halli
Jaraganahalli, Chunchanaghatta,
Puttenahalli, Kothunur, Arekere,
Hulimavu, Madivala, Agaram, Varthur,
Begur, Chikkabegur, Singasandra,
Kadagi Singasandra, Somasundra
palya, Garvibhavpalya, Hosapalya
16
R R Nagar
& Kengeri
Mallathahalli, Hosakere, Kengeri,
Dubasapalya, Halgevadrahalli
5
Benefits after the completion of UGD works under KMRP
19. Erstwhile
ULB
Name of the Lake No. of
lakes
Dasarahalli Dasarahalli, Doddabidrakallu,
Herohalli, Laggere, Shivapura,
Pillappakatte, Bagalkunte,
Mallasandra, Chikkabanavara,
Nelegadaranahalli
10
Total 70
Benefits after the completion of UGD works under KMRP