This presentation summarizes the master plan project report for remodeling storm water drains in Bengaluru. Some key points: - The project area covers all of BBMP (Bruhath Bengaluru Mahanagara Palike) which is 710 square kilometers divided into 8 zones. - The master plan proposes improvements to over 800 kilometers of storm water drains, including widening drains, constructing retaining walls, improving culverts and bridges, and developing water bodies to increase holding capacity. - The total estimated cost is Rs. 4,158 crores to be implemented over 7 years in 3 stages, with the majority of funds (62%) allocated to improving carrying capacity of drains.

1. Presentation
on
Master Plan Project Report
for
Remodeling of Storm Water Drains
in Entire BBMP Area, Bengaluru
STUP Consultants Pvt. Ltd.
Bruhath Bengaluru Mahanagara Palike

2. Salient Features
 Bruhath Bengaluru Mahanagara Palike (BBMP) Area - 710 Sq.Km.
(Core Area - 225 Sq.Km.,
Peripheral Area - 485 Sq. Km.)
 Total Water Shed / Catchment Area - 1016. 50 Sq.km.
 Total Length of SWD in BBMP Area – 840 Km.
(Core Area – 240 Km.,
Peripheral Area - 600 Km.)
(Primary Drain Length – 415 Km. &
Secondary Drain Length – 425 Km.)

3. Master Plan Project Study Area
 Core Area
 East Zone
 West Zone
 South Zone
 Bommanahalli
 Yelahanka
 Dasarahalli
 Mahadevapura
 Rajarajeshwarinagara
Study Area Map

4. Reasons for flooding
 Change in land use pattern
 Flow obstruction due to construction of RCC hume pipe culverts
 Inappropriate design approach, construction methodology for structures
and maintenance procedures adopted in newly formed layouts
 Development of land in tank bed areas and below drain HFL
 Modification of original drain alignment during formation of layouts
 Non existence of service roads on either side for laying service lines and
routine maintenance.
 Indiscriminate dumping of debris and solid wastes into drains
 Dense vegetation growth
 Encroachment / Modification of original drain alignment
 Lack of access for routine maintenance
 Services lines laid inside and across drains
 Blockage of inlet/outlet location of water bodies
 Water bodies not functioning as retention basins
 Sewer lines laid inside and across storm water drains
 Sewage flow in storm water drains
 Inadequate vent size railway culverts at 60 locations

5. Site Appreciation

6. Site Appreciation
Development of land in tank
bed areas & Below drain HFL
DH369, Near Hegganahalli -
Dasarahalli
DH233, Near Bagalagunte,
Dasarahalli

7. Utility Cables lines laid across SWD at culvert locations is obstruction flow of water
MD 264, Near Ramamurthynagara,
Mahadevapura
BH551, Near Arkere,
Bommnahalli
BH579, Near MICO Factory, Hosur Road

8. Site Appreciation
Garbage dumped inside SWD
MD 349, Near Marathalli, ORR -
Mahadevapura
Dasarahalli Zone
Near Hongasandra, Bommanahalli

9. DH332, Kalika Nagara, Dasarahalli
DH 211,211A & B, Near Lageere Main Road,
Dasarahalli
Inadequate Vent Size Culverts

10. Reasons for flooding
 Lakes
 Reduction in number of lakes
 Blockage due to vegetation growth, dumping of debris at
inlet/outlet location of water bodies
 Water bodies not functioning as retention basins
 Reduction in holding capacity due to reduction in lake areas,
severe siltation and entry of sewage etc
 Non existence of regulatory gate arrangement to regulate
flood discharge
 Non existence of interconnectivity between water bodies due
to encroachment / modification of original alignment.
 Drain diversion/bypass arrangement made to all water bodies

11. Condition of Water Bodies in BBMP Area
Chikka Beguru Kere, Bommanahalli Zone Dodda Kalsandra Kere, Bommanahalli Zone
Karihobanahalli Kere, Dasarahalli Zone
Nelakdhirenahalli Kere, Dasarahalli Zone

12. This has led to
 Reduction in open spaces
 Reduced time of concentration
 Reduction in holding capacity of lakes.
 Limited land availability for construction of detention
ponds
 Reduced space available for improving the drains
 More flooding
 Deterioration in public health & environmental
sanitation conditions.
 Increased cost expenditure etc.

13. Master Plan for
Remodelling of Storm Water Drains
in Eight Zones of BBMP Area

14. Project Objectives
 To minimise flood runoff.
 To ensure free flow of storm water and to minimize flooding in
critical flood prone areas.
 To improve the health and environmental sanitation conditions in
the surrounding vicinity of SWDs and Water bodies.
 To protect the existing waterways and water bodies from
environmental degradation.
 To improve ground water level by holding rain water in water bodies.
 To provide alternate water source in case of emergencies by rain
water harvesting.

15. Salient Details of Major & Minor
Water Shed Catchment Areas
Sl.
No.
Zone
Total Water Shed
Catchment Area
(Ha.)
No. of Major
Water Shed
Catchment
Areas
No. of Minor
Water Shed
Catchment
Areas
Total Drain
Length
(Km.)
1 East Zone 10,937 8 134
2252 West Zone 6,366 4 87
3 South Zone 5,553 4 69
4 Rajarajeshwarinagara Zone 15,365 9 118 138.15
5 Dasarahalli Zone 9,505 7 94 92.81
6 Yelahanka Zone 14,235 9 129 104.91
7 Mahadevapura Zone 23,371 11 236 164.24
8 Bommanahalli Zone 16,317 16 300 115.15
Total 101,650 68 1167 840.26

16. Map showing Storm Water Drains in BBMP area

17. Summary of Project Findings
• Drain reach is in natural condition at many places
• Original alignment modified at certain reaches
• Drain walls & culverts constructed by earst while CMC authorities
are, inadequate vent way not as per standard designs and also in
dilapidated condition in many places
• Drain width drastically reduced at many places and buildings
constructed butting to the drain wall
• Due to change in land use the culverts constructed by earst while
CMC authorities are not matching to the present field requirement.
• Due to non existence of sewerage system, large quantity of raw
sewage flow is observed in open drains.
• The inlet/outlet weir of water bodies is in dilapidated condition and
completely chocked
• Inadequate maintenance is evident

18. Master Plan Proposals

20. Rain Gauging Station, Data Generation, Flood control & Monitoring Station

21. Development of Water Bodies as Holding Ponds

22. Typical Section of RCC Box Culvert in Place of Pipe Culvert

23. Typical Section of Bridge with Pile arrangement
Typical Section of slab culvert
Intl. Airport Road, Sahakaranagara

24. Typical drain cross section
with RCC Retaining wall and Service Corridor
Sewer Line Sewer Line
Property
Boundary Property
Boundary
Property
Boundary Property
Boundary
Typical drain cross section with Earthen embankment,
stone revetment with CC lining and Service Corridor over embankment
Sewer Line Sewer Line

25. Beautification along side Major Storm water Drains
in Core Area

26. Sl .No. Name of the Zone
Amount
(Rs. In Crores)
1 East
654.222 West
3 South
4 Bommanahalli 665.14
5 Yelahanka 655.26
6 Dasarahalli 508.99
7 Mahadevapura 914.91
8 Rajrarajeshwarinagara 759.73
Total Estimated Cost 4,158.25
Say 4,160.00
Estimated Cost of SWD Master Plan Project
(As per 2010-11 Price Level)

27. MASTER PLAN PROJECT COST ALLOCATION
604.36, 16%614.45, 16%
605.32, 16%
470.20, 12% 845.19, 22%
701.82, 18%
ESTIMATED COST FOR STRUCTURAL WORKS FOR
DIFFERENT ZONES OF BBMP UNDER SWD MASTER
PLAN PROJECT TOTAL COST = 3,841.34 CRORES
Core Area (W +
E+ S)
Bommanahalli
Zone
Yelahanka Zone
Dasarahalli Zone
Mahadevpura
Zone
Rajarajeshwarina
gar Zone
49.86, 16%
50.69, 16%
49.94, 16%
38.79, 12%
69.73, 22% 57.90, 18%
ESTIMATED COST FOR NON STRUCTURAL WORKS
FOR DIFFERENT ZONES OF BBMP UNDER SWD
MASTER PLAN PROJECT
TOTAL COST = 316.91 CRORES
Core Area (W +
E+ S)
Bommanahalli
Zone
Yelahanka Zone
Dasarahalli Zone
Mahadevpura
Zone
Rajarajeshwarinag
ar Zone
654.22, 16%665.14, 16%
655.26, 16%
508.99, 12%
914.91, 22%
759.73, 18%
TOTAL ESTIMATED COST FOR STRUCTURAL & NON
STRUCTURAL WORKS FOR DIFFERENT ZONES OF
BBMP UNDER SWD MASTER PLAN PROJECT
TOTAL COST = 4,158.25 CRORES
Core Area (W +
E+ S)
Bommanahalli
Zone
Yelahanka Zone
Dasarahalli Zone
Mahadevpura
Zone
Rajarajeshwarinag
ar Zone
2,569.30,
62%
14.49, 0%
266.08, 6%
749.57, 18% 185.00, 5%
373.80, 9%
ESTIMATED COST FOR DIFFERENT WORKS UNDER
SWD MASTER PLAN PROJECT
TOTAL COST = 4,158.25 CRORES
Carrying Capacity
Improvement
Rehabilitation /
Strengthening
Culverts / Bridges
Allied Drain Works
Decentralized
STP's
Non Structural
Works

28. Work Programme For Implementation of Storm Water Drain Proposals of Master Plan
Project
Sl. Project Estimated Gestation Stage - 1 Stage - 2 Stage - 3 Stage - 1 Stage - 2 Stage - 3
No. Component Cost (1 Year) (3 Years) (3 Years) (3 Years) 1
st
Year 2
nd
Year 3
rd
Year 1
st
Year 2
nd
Year 3
rd
Year 1
st
Year 2
nd
Year 3
rd
Year
(Rs. Crores) % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount
1.0 Improvement to Carrying
Capacity:
1.1 Desilting & deepening 121.34 5% 6.07 50% 60.67 30% 36.40 15% 18.20 60% 36.40 20% 12.13 20% 12.13 50% 18.20 30% 10.92 20% 7.28 50% 9.10 30% 5.46 20% 3.64
1.2 Widening
a. Earthen bund 238.59 0% 0.00 20% 47.72 40% 95.43 40% 95.43 50% 23.86 25% 11.93 25% 11.93 50% 47.72 30% 28.63 20% 19.09 50% 47.72 30% 28.63 20% 19.09
b. RCC independent walls 559.62 5% 27.98 40% 223.85 30% 167.89 25% 139.90 50% 111.92 30% 67.15 20% 44.77 50% 83.94 30% 50.37 20% 33.58 50% 69.95 30% 41.97 20% 27.98
c. RCC "U" shaped walls 971.62 5% 48.58 40% 388.65 30% 291.49 25% 242.90 50% 194.32 30% 116.59 20% 77.73 50% 145.74 30% 87.45 20% 58.30 50% 121.45 30% 72.87 20% 48.58
d. CRS / SSM masonry
walls
230.12 5% 11.51 40% 92.05 30% 69.04 25% 57.53 50% 46.02 30% 27.61 20% 18.41 50% 34.52 30% 20.71 20% 13.81 50% 28.77 30% 17.26 20% 11.51
e. RCC box drain 369.27 5% 18.46 40% 147.71 30% 110.78 25% 92.32 50% 73.85 30% 44.31 20% 29.54 50% 55.39 30% 33.23 20% 22.16 50% 46.16 30% 27.70 20% 18.46
1.3 Bed protection 78.75 5% 3.94 20% 15.75 50% 39.37 25% 19.69 30% 4.72 50% 7.87 20% 3.15 30% 11.81 50% 19.69 20% 7.87 30% 5.91 50% 9.84 20% 3.94
Sub Total 2569.30 116.54 976.39 810.40 665.98 491.11 287.61 197.66 397.32 250.99 162.08 329.05 203.73 133.20
2.0 Rehabilitation and
Strengthening:
CRS / SSM Wall
Reconstruction
12.90 10% 1.29 50% 6.45 30% 3.87 10% 1.29 50% 3.23 30% 1.94 20% 1.29 50% 1.94 30% 1.16 20% 0.77 50% 0.65 30% 0.39 20% 0.26
CRS / SSM Wall
Restoration
1.59
10% 0.16 50% 0.79 30% 0.48 10% 0.16 50% 0.40 30% 0.24 20% 0.16 50% 0.24 30% 0.14 20% 0.10 50% 0.08 30% 0.05 20% 0.03
Sub Total 14.49 1.45 7.24 4.35 1.45 3.62 2.17 1.45 2.17 1.30 0.87 0.72 0.43 0.29
3.0 Culverts and Bridges:
3.1 Utility supports & bridges 5.75 15% 0.86 50% 2.88 20% 1.15 15% 0.86 60% 1.73 25% 0.72 15% 0.43 60% 0.69 25% 0.29 15% 0.17 60% 0.52 25% 0.22 15% 0.13
3.2 Remodeling 244.45 15% 36.67 50% 122.22 20% 48.89 15% 36.67 60% 73.33 25% 30.56 15% 18.33 60% 29.33 25% 12.22 15% 7.33 60% 22.00 25% 9.17 15% 5.50
3.3 Rehabilitation 7.22 15% 1.08 50% 3.61 20% 1.44 15% 1.08 60% 2.16 25% 0.90 15% 0.54 60% 0.87 25% 0.36 15% 0.22 60% 0.65 25% 0.27 15% 0.16
3.4 Railway Culverts 8.67 15% 1.30 50% 4.33 20% 1.73 15% 1.30 60% 2.60 25% 1.08 15% 0.65 60% 1.04 25% 0.43 15% 0.26 60% 0.78 25% 0.32 15% 0.19
Sub Total 266.08 39.91 133.04 53.22 39.91 79.82 33.26 19.96 31.93 13.30 7.98 23.95 9.98 5.99
4.0 Allied Works:
4.1 Boundary stones 1.16 40% 0.47 60% 0.70 0% 0.00 0% 0.00 60% 0.42 20% 0.14 20% 0.14 50% 0.00 30% 0.00 20% 0.00 50% 0.00 30% 0.00 20% 0.00
4.2 Drains in low lying areas 224.69 15% 33.70 60% 134.81 15% 33.70 10% 22.47 60% 80.89 25% 33.70 15% 20.22 60% 20.22 25% 8.43 15% 5.06 60% 13.48 25% 5.62 15% 3.37
4.3 Service roads 187.44 0% 0.00 20% 37.49 30% 56.23 50% 93.72 20% 7.50 30% 11.25 50% 18.74 20% 11.25 30% 16.87 50% 28.12 20% 18.74 30% 28.12 50% 46.86
4.4 Fencing 89.39 0% 0.00 20% 17.88 30% 26.82 50% 44.69 20% 3.58 30% 5.36 50% 8.94 20% 5.36 30% 8.04 50% 13.41 20% 8.94 30% 13.41 50% 22.35
4.5 Detention ponds 16.43 0% 0.00 20% 3.29 50% 8.22 30% 4.93 40% 1.31 30% 0.99 30% 0.99 40% 3.29 30% 2.46 30% 2.46 40% 1.97 30% 1.48 30% 1.48
4.6 Retarding basins 8.46 5% 0.42 40% 3.38 30% 2.54 25% 2.12 50% 1.69 30% 1.02 20% 0.68 50% 1.27 30% 0.76 20% 0.51 50% 1.06 30% 0.63 20% 0.42
4.7 Development of water
bodies
96.40 10% 9.64 30% 28.92 40% 38.56 20% 19.28 30% 8.68 50% 14.46 20% 5.78 30% 11.57 50% 19.28 20% 7.71 30% 5.78 50% 9.64 20% 3.86
4.8 Silt traps 11.68 5% 0.58 50% 5.84 30% 3.50 15% 1.75 60% 3.50 20% 1.17 20% 1.17 50% 1.75 30% 1.05 20% 0.70 50% 0.88 30% 0.53 20% 0.35
4.9 Desilting ramps 5.24 0% 0.00 20% 1.05 30% 1.57 50% 2.62 20% 0.21 30% 0.31 50% 0.52 20% 0.31 30% 0.47 50% 0.79 20% 0.52 30% 0.79 50% 1.31
4.10 Inlet / out weirs 17.57 5% 0.88 50% 8.78 30% 5.27 15% 2.64 60% 5.27 20% 1.76 20% 1.76 50% 2.64 30% 1.58 20% 1.05 50% 1.32 30% 0.79 20% 0.53
4.11 Rain gauge stations 0.45 40% 0.18 60% 0.27 0% 0.00 0% 0.00 60% 0.16 20% 0.05 20% 0.05 50% 0.00 30% 0.00 20% 0.00 50% 0.00 30% 0.00 20% 0.00
4.12 Shifting of sewers 69.47 5% 3.47 50% 34.73 30% 20.84 15% 10.42 60% 20.84 20% 6.95 20% 6.95 50% 10.42 30% 6.25 20% 4.17 50% 5.21 30% 3.13 20% 2.08
4.13 Desilting equipments 18.00 25% 4.50 50% 9.00 25% 4.50 0% 0.00 60% 5.40 20% 1.80 20% 1.80 50% 2.25 30% 1.35 20% 0.90 50% 0.00 30% 0.00 20% 0.00
4.14 Vehicles for vigilance
squad
3.20 10% 0.32 50% 1.60 25% 0.80 15% 0.48 60% 0.96 20% 0.32 20% 0.32 50% 0.40 30% 0.24 20% 0.16 50% 0.24 30% 0.14 20% 0.10
Sub Total 749.57 54.17 287.74 202.55 205.11 140.41 79.27 68.06 70.73 66.79 65.03 58.14 64.27 82.70
5.0 Sewage Treatment
Plants:
Decentralized STP's 185.00 10% 18.50 30% 55.50 40% 74.00 20% 37.00 25% 13.88 60% 33.30 15% 8.33 25% 18.50 60% 44.40 15% 11.10 25% 9.25 60% 22.20 15% 5.55
Sub Total 185.00 18.50 55.50 74.00 37.00 13.88 33.30 8.33 18.50 44.40 11.10 9.25 22.20 5.55
Total Structural = 3784.45 230.56 1459.92 1144.51 949.45 728.84 435.62 295.45 520.65 376.79 247.06 421.12 300.61 227.72
6.0 Non Structural Works:
6.1 DPR and PMC 38.41 100% 38.41 0% 0.00 0% 0.00 0% 0.00 0% 0.00 0% 0.00 0% 0.00 0% 0.00 0% 0.00 0% 0.00 0% 0.00 0% 0.00 0% 0.00
6.2 Rehabilitation and
resettlement
76.83 40% 30.73 60% 46.10 0% 0.00 0% 0.00 60% 27.66 20% 9.22 20% 9.22 50% 0.00 30% 0.00 20% 0.00 50% 0.00 30% 0.00 20% 0.00
6.3 Shifting of other services 56.89 5% 2.84 50% 28.44 30% 17.07 15% 8.53 60% 17.07 20% 5.69 20% 5.69 50% 8.53 30% 5.12 20% 3.41 50% 4.27 30% 2.56 20% 1.71
6.4 Development of green belt 9.60 0% 0.00 20% 1.92 30% 2.88 50% 4.80 20% 0.38 30% 0.58 50% 0.96 20% 0.58 30% 0.86 50% 1.44 20% 0.96 30% 1.44 50% 2.40
6.5 WCE + Admin. 192.07 10% 19.21 30% 57.62 30% 57.62 30% 57.62 25% 14.41 35% 20.17 40% 23.05 25% 14.41 35% 20.17 40% 23.05 25% 14.41 35% 20.17 40% 23.05
Total Non Structural = 373.80 91.20 134.08 77.57 70.96 59.51 35.65 38.92 23.51 26.15 27.90 19.63 24.17 27.16
Total of SWD = 4158.25 321.76 1594.00 1222.08 1020.41 788.35 471.27 334.37 544.17 402.95 274.97 440.75 324.78 254.88

29. PROJECT PHASING AND INVESTMENT PLAN
PROJECT INVESTMENT PLAN FOR TOTAL MASTER PLAN
PROJECT FOR STRUCTURAL WORKS
TOTAL COST Rs. 3784.45 CRORES
233.87
736.21
436.77
295.49
522.71
376.52
244.36
419.84
297.33
221.35
0.00
100.00
200.00
300.00
400.00
500.00
600.00
700.00
800.00
1st
Year
2nd
Year
3rd
Year
4th
Year
5th
Year
6th
Year
7th
Year
8th
Year
9th
Year
10th
Year
Project Year
EstimatedCost(Rs.Crores)
TOTAL PROJECT INVESTMENT PLAN FOR MASTER PLAN
TOTAL COST Rs. 4158.25 CRORES
248.50
321.50
439.47
272.27
402.67
546.22
334.41
472.42
795.72
325.07
0.00
100.00
200.00
300.00
400.00
500.00
600.00
700.00
800.00
900.00
1st
Year
2nd
Year
3rd
Year
4th
Year
5th
Year
6th
Year
7th
Year
8th
Year
9th
Year
10th
Year
Project Year
EstimatedCost(Rs.Crores)
PROJECT INVESTMENT PLAN FOR TOTAL MASTER PLAN
PROJECT FOR NON STRUCTURAL WORKS
TOTAL COST Rs. 373.80 CRORES
91.20
59.51
35.65
38.92
23.51 26.15
27.90
19.63 24.17
27.16
0.00
10.00
20.00
30.00
40.00
50.00
60.00
70.00
80.00
90.00
100.00
1st
Year
2nd
Year
3rd
Year
4th
Year
5th
Year
6th
Year
7th
Year
8th
Year
9th
Year
10th
Year
Project Year
EstimatedCost(Rs.Crores)
PROJECT INVESTMENT PLAN FOR DIFFERENT WORKS
FOR MASTER PLAN PROJECT
TOTAL COST Rs. 4158.25 CRORES
2569.24
14.49
266.08
749.64
185.00 373.80
0.00
500.00
1000.00
1500.00
2000.00
2500.00
3000.00
Carrying
Capacity
Improvement
Rehabilitation/
Strengthening
Culverts/
Bridges
AlliedDrain
Works
Decentralized
STP's
NonStructural
Works
Type of Work
EstimatedCost(Rs.Crores)

30. Benefits from Implementation
 Provision of a properly designed drainage system for a
reasonably acceptable return period would ensure reduction in
flood incidences which in turn reduces flood damages and traffic
hold ups.
 Provision and properly maintained drainage system with controls
on sewage connections and solid waste dumping will enhance
the Environmental quality in the form of reduced pollution of
water bodies and ground water.
 Provision and proper maintenance of facilities like detention
ponds and retention basins will not only attenuate the peak run-
offs but also provide recharge of ground water which will improve
ground water table.
 Provision and proper maintenance of localized sewage treatment
plants and using the treated sewage will reduce the stress on
fresh water sources.
 Availability of treated sewage will enable more greenery and fresh
water lake developed assists reduction in climate change.

31. Thank you