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

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.)

Master Plan Project Study Area

Core Area East Zone West Zone South Zone

Bommanahalli Yelahanka Dasarahalli Mahadevapura Rajarajeshwarinagara

Study Area Map

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

Site Appreciation

Site Appreciation

Development of land in tank bed areas & Below drain HFL

DH369, Near Hegganahalli - Dasarahalli

DH233, Near Bagalagunte, Dasarahalli

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

Site Appreciation

Garbage dumped inside SWD

MD 349, Near Marathalli, ORR - Mahadevapura

Dasarahalli Zone

Near Hongasandra, Bommanahalli

DH332, Kalika Nagara, Dasarahalli

DH 211,211A & B, Near Lageere Main Road, Dasarahalli

Inadequate Vent Size Culverts

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

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

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.

Master Plan for Remodelling of Storm Water Drains

in Eight Zones of BBMP Area

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.

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

Map showing Storm Water Drains in BBMP area

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

Master Plan Proposals

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

Development of Water Bodies as Holding Ponds

Typical Section of RCC Box Culvert in Place of Pipe Culvert

Typical Section of Bridge with Pile arrangement

Typical Section of slab culvert

Intl. Airport Road, Sahakaranagara

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

Beautification along side Major Storm water Drains

in Core Area

Sl .No.

Name of the Zone

Amount(Rs. In Crores)

1 East654.22 2 West

3 South4 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)

MASTER PLAN PROJECT COST ALLOCATION

604.359352516213; 16%

614.44720659562; 16%

605.31847305026; 16%

470.200520531151; 12% 845.185457824969; 22%

701.824931375563; 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

Rajarajeshwari-nagar Zone

49.8596465825874; 16%50.691894544138

8; 16%

49.9387740266464; 16%

38.7915429438201; 12%

69.7278002705598; 22%57.900556838484

; 18%

ESTIMATED COST FOR NON STRUCTURAL WORKS FOR DIFFERENT ZONES OF BBMP UNDER SWD

MASTER PLAN PROJECTTOTAL COST = 316.91 CRORES

Core Area (W + E+ S)

Bommanahalli Zone

Yelahanka Zone

Dasarahalli Zone

Mahadevpura Zone

Rajarajeshwarinagar Zone

654.2189990988; 16%

665.13910113976; 16%

655.257247076906; 16%

508.992063474971; 12%

914.913258095527; 22%759.72548821404

7; 18%

TOTAL ESTIMATED COST FOR STRUCTURAL & NON STRUCTURAL WORKS FOR DIFFERENT ZONES OF

BBMP UNDER SWD MASTER PLAN PROJECTTOTAL COST = 4,158.25 CRORES

Core Area (W + E+ S)

Bommanahalli Zone

Yelahanka Zone

Dasarahalli Zone

Mahadevpura Zone

Rajarajeshwarinagar Zone

2569.30181613535; 62%

14.4876158842814; 0%

266.082525873485; 6%

749.573226987842; 18%185; 4%

373.800077775829; 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

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 - 3No. Component Cost (1 Year) (3 Years) (3 Years) (3 Years) 1st Year 2nd Year 3rd Year 1st Year 2nd Year 3rd Year 1st Year 2nd Year 3rd Year

(Rs. Crores) % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount % Amount1.0 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% 3.641.2 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% 18.461.3 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

1.5910% 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 0.293.0 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% 5.503.3 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% 0.163.4 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% 0.004.2 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% 46.864.4 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% 22.354.5 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% 1.484.6 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% 0.424.7 Development  of  water 

bodies96.40 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% 0.354.9 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% 1.314.10 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% 0.534.11 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% 0.004.12 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% 2.084.13 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% 0.004.14 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 82.705.0 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% 0.006.2 Rehabilitation  and 

resettlement76.83 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

PROJECT PHASING AND INVESTMENT PLANPROJECT INVESTMENT PLAN FOR TOTAL MASTER PLAN

PROJECT FOR STRUCTURAL WORKSTOTAL COST Rs. 3784.45 CRORES

233.87

736.21

436.77

295.49

522.71376.52

244.36

419.84

297.33221.35

0.00

100.00

200.00

300.00

400.00

500.00

600.00

700.00

800.00

1stYear

2ndYear

3rdYear

4thYear

5thYear

6thYear

7thYear

8thYear

9thYear

10thYear

Project Year

Estim

ated

Cos

t (R

s. C

rore

s)

TOTAL PROJECT INVESTMENT PLAN FOR MASTER PLAN TOTAL COST Rs. 4158.25 CRORES

248.50

321.50439.47

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

1stYear

2ndYear

3rdYear

4thYear

5thYear

6thYear

7thYear

8thYear

9thYear

10thYear

Project Year

Estim

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Cos

t (R

s. C

rore

s)

PROJECT INVESTMENT PLAN FOR TOTAL MASTER PLAN PROJECT FOR NON STRUCTURAL WORKS

TOTAL COST Rs. 373.80 CRORES

91.20

59.51

35.6538.92

23.51 26.1527.90

19.63 24.1727.16

0.0010.0020.0030.0040.0050.00

60.0070.0080.0090.00

100.00

1stYear

2ndYear

3rdYear

4thYear

5thYear

6thYear

7thYear

8thYear

9thYear

10thYear

Project Year

Estim

ated

Cos

t (R

s. C

rore

s)

PROJECT INVESTMENT PLAN FOR DIFFERENT WORKS FOR MASTER PLAN PROJECT

TOTAL COST Rs. 4158.25 CRORES

2569.24

14.49266.08

749.64

185.00 373.80

0.00

500.00

1000.00

1500.00

2000.00

2500.00

3000.00

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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.

Thank you