bwssbbwssb environment action plan (part -b) for bangalore presentation on by chief engineer (cp...

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ENVIRONMENT ACTION PLAN (PART -B)

FOR BANGALORE

Presentation on

By

Chief Engineer (CP & WWM)BWSSB

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MAJOR RIVERS IN AND AROUND MAJOR RIVERS IN AND AROUND BANGALOREBANGALORE

TO TAMILNADU AND BAY OF BENGAL

TO TAMILNADU AND BAY OF BENGAL

JOINS RIVER PONNAIYAR

KARNATAKA

BOUNDARY

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DRAINAGE PATTERN OF BANGALOREDRAINAGE PATTERN OF BANGALORE

PONNIAYAR BASINCAUVERY

BASIN RIDGE LINE

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WHAT IS ALL ABOUT –

ENVIRONMENTAL ACTION PLAN (EAP) ?

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WHAT IS EAP ?

AN ACTION PLAN INCLUDING COST AND TIME REQUIRED FOR REHABILITATION OF EXISTING SEWERAGE SYSTEM TO COLLECT, TREAT AND DISPOSE THE TREATED SEWAGE THERE BY ABATING THE RAW SEWAGE FLOW INTO DRAINS AND LAKES etc.

EAP-PART‘A’ : WORKS STARTED WITH NRCP FUNDS

EAP-PART ‘B’ : ADDITIONAL WORKS IDENTIFIED FOR KUIDFC FUNDING

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OBJECTIVE

– STOPPING FLOW OF RAW SEWAGE INTO STORM

WATER DRAINS

– ACHIEVING ZERO DISCHARGE OF RAW SEWAGE

INTO DRAINS

– CONVEYING SEWAGE TO TREATMENT PLANTS

– AND TREATING TO MEET STANDARDS

– IMPROVING ENVIRONMENT

– IMPROVING SOCIO-ECONOMIC STATUS

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EAP-PART ‘A’

• Under EAP-Part ‘A’, totally fourteen works for rehabilitation of major sewers were identified and prioritised based on their condition & urgency in all three major valleys as follows:

1. V-Valley : Ten works

2. Koramangala Valley : Three works

3. Challaghatta Valley : One work

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WORKS UNDER EAP –PART’A’

SANCTIONED FUNDS : Rs. 46.27 Crores

AWARDED COST OF WORKS : Rs. 56.6 Crores

DETAILS OF WORKS

VRISHABAVATHI VALLEY : 10 Works

KORAMANGALA VALLEY : 03 Works

CHALLAGHATTA VALLEY : 01 Works

TOTAL LENGTH OF SEWERS : 22.41 KM

DUE DATE FOR COMPLETION : AUGUST 2004

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SEWERS COVERED UNDER EAP-PART(A)

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• V-Valley

1. Sujatha Theatre – Laying of parallel 1200mm and 1600mm dia trunk sewers2. Guttahalli – Laying of 600mm dia submain 3. Hosakerehalli Bus stand – Laying of 450mm dia submain4. APMC – Laying of 450mm dia submain5. Cauvery nagar – Laying of 450 & 600mm dia submain6. Nandhini Theatre – Laying of 450mm dia submain7. Kamakshipalya – laying of 450mm dia submain8. Laggere – Laying of 450mm dia submain9. Magadi Road Bridge- Laying of parallel 1200mm dia trunk sewer10. SJR College – Laying of 1200mm dia trunk sewer

• Challaghatta 11. RBANMS Junction – Laying of 1200mm, 1600mm and 1800mm dia

trunk sewers- Enhancement of capacity

• Koramangala12. Koramangala Peripheral – Laying of 600mm dia trunk sewer-Enhancement of

Capacity13. Madivala –Laying of 1000 mm &1800 mm dia trunk sewers.14. J.P Nagar 6th Phase- Laying of 600 mm &800 mm dia trunk sewers-

Enhancement of Capacity.

LIST OF SEWERS COVERED UNDER EAP-PART(A)

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WHY SEWAGE IS FLOWING INTO

STORM WATER DRAINS ?

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BECAUSE OF

1. INADEQUATE CARRYING CAPACITY 2. CORRODED & DAMAGED SEWERS3. SEWERS WITH REVERSE / FLAT GRADIENT 4. SEWERS NOT LINKED TO SYSTEM5. SEWERS NOT PROVIDED IN CERTAIN AREAS6. SEWERS DISPLACED DURING FLOODS7. SEWERS CONNECTED TO DRAINS DIRECTLY8. MANHOLES DAMAGED FOR IRRIGATION9. MANHOLES OVERFLOWING DUE TO

BLOCKAGE BY THE SOLID WASTES DUMPED INTO MANHOLES

10. MANHOLES AND SEWERS ENCROACHED

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO

INADEQUATE CARRYING CAPACITY

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B Seshadripuram Main Road-Malleshwaram-V Valley

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BJakkarayana Kere – Seshadripuram: V-Valley

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BEast End Road – Jayanagar :

Koramangala Valley

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO CORRODED

AND DAMAGED SEWERS

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Magadi Road-Cholurplaya-V-Valley

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B Clear View in Magadi Road-Cholurplaya-V-Valley

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BCorroded Sewer Exposed in MV Garden-Ulsoor

Challaghatta Valley

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B Sathyanarayana Swamy Temple Street –Near Ulsoor Lake –Challaghatta Valley

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BUlsoor Lake Bund – Challghatta Valley

Nalla Road- Murphy Town

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BNear Nalla Road in M.V. Garden-Ulsoor

Challghatta Valley

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO SEWERS LAID IN REVERSE / FLAT

GRADIENT

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BNear the Park in Prasanthi Nagar-Pattegerpalya

K & A Valley

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BNear PESIT in Desouza Colony – Hosekerehalli

V-Valley

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BAt Ranganathapura in KamakshiPalya

K & A Valley

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BIn RPC Layout -Rajaji Nagar : V-Valley

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO ABSENCE OF SEWERAGE NETWORK

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BNear Pusphagiri Nagar-Hosekere halli

Kathriguppa Valley

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO SEWERS

DISPLACED DURING FLOOD

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Near Infant Jesues Church at Vivek NagarK-Valley

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO LATERALS DIRECTLY CONNECTED TO

DRAINS

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BMaruthi Nagar- Tavarakere

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BJ.P Nagar 6th Phase –Jaragenahalli

Tavarekere

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BNear Krishnappa Garden- Balaji Nagar

Koramangala Valley

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BAndhaman Nagar, J.C. Road

Koramanagala Valley

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BGazoor Layout -Vinayak Nagar

Tavarekere

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BDollars Layout - J.P Nagar

Tavarekere

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO SEWERS

AND MANHOLES DAMAGED TO IRRIGATE THE FIELDS

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BDefence land : KoramangalaValley

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Defence land : Koramangala Valley

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BCentral Excise Layout-Yeshwanthapur

Hebbal

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Defence Land - Koramangala Valley

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO SEWERSLAID INSIDE THE STORM

WATER DRAINS

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Srinivasanagar : Kathriguppa Valley

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BSt.Jhons Church Road-Ulsoor

Challaghatta Valley

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BArmstrong Road-Ulsoor

Challaghatta Valley

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SEWAGE FLOWS INTO OPEN DRAINS DUE TO SEWERS

AND MANHOLES ENCROACHED

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BDollars layout – J.P. NAGAR

Tavarekere

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BGiri Nagar : Kathriguppe Valley

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B NDRI Compound – Koramangala Valley

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BTimber Yard Layout - Sanjay Nagar

V-Valley

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BKrishanamma Garden –Munnireddy Palya

Challaghatta Valley

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IN ADDITION THE SYSTEM SUFFERS DUE TO

• LOW STRENGTH PIPES (NP2 / CI)

• PIPES USED BEYOND LIFE TIME

• NO PROPER BEDDING

• LACK OF CO-ORDINATION IN LINKING OF LOWER DIAMETER SEWERS

• UNEXPECTED DEVLOPMENTS &TRAFFIC LOAD

• ABSENCE OF VENT SHAFTS FOR LONG SEWERS

• DISCHARGE OF INDUSTRIAL WASTE

• ABSENCE OF INTERIOR DETAILS OF SEWERS

AND MANHOLES

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NECESSITY FOR EAP-PART B

TO ACHIEVE THE OVER ALL GOAL OF ZERO

DISCHARGE INTO DRAINS IT IS VERY MUCH

REQUIRED TO CARRY OUT THE WORKS

IDENTIFIED IN ALL MINOR VALLEYS AND FEW

ADDITIONAL WORKS IDENTIFIED THERAFTER

IN MAJOR VALLEYS. THEY ARE TO BE

INTERLINKED WITH THOSE WORKS UNDER

EAP-PART - A

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SCOPE OF WORK – EAP (PART B)

• REHABILITATION / REPLACEMENT OF IDENTIFIED SEWERS (450mm to 2000mm dia) & APPERTUNENCES

• RECTIFYING THE DEFECTS IN THE COLLECTION SYSTEM

• LAYING NEW SEWERS WHEREVER NEEDED

• CONDUCTING CC-TV SURVEY TO ASSESS THE CONDITIONS OF MAJOR SEWERS

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SUMMARY OF PROPOSAL – EAP (PART B)

• TOTAL LENGTH OF SEWERS : 95 KM

• LENGTH OF GRP SEWERS : 7.8 KM

• DIA OF SEWERS : 450 - 2000 mm

• TOTAL COST : Rs. 100 CRORES

• TIME REQUIRED : TWO YEARS

• NUMBER OF WORKS : 56

• BASIS OF ESTIMATES : BWSSB SR(02-03)

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OVERALL MAP SHOWING WORKS IDENTIFIED UNDER EAP (PART B)

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V - VALLEY

• NUMBER OF WORKS : 12

• LENGTH OF SEWERS : 19 KM

• COST OF WORKS : Rs. 9.16

Crores

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MAP SHOWING IDENTIFIED SEWERS

IN V-VALLEY

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KATHRIGUPPE VALLEY

• NUMBER OF WORKS : 6

• LENGTH OF SEWERS : 10.7 KM

• COST OF WORKS : Rs. 5.25 Crores

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MAP SHOWING IDENTIFIED SEWERS IN KATHRIGUPPE

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KETHMARANAHLLI & ARKAVATHYVALLEY

• NUMBER OF WORKS : 6

• LENGTH OF SEWERS : 13.9 KM

• COST OF WORKS : Rs. 5.7 Crores

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MAP SHOWING IDENTIFIED

SEWERS IN ARKAVATHY

VALLEY

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HEBBAL VALLEY

• NUMBER OF WORKS : 3

• LENGTH OF SEWERS : 6.0 KM

• LENGTH OF GRP SEWERS : 0.5 KM

• COST OF WORKS : Rs. 7.8 Crores

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MAP SHOWING IDENTIFIED SEWERS IN HEBBAL VALLEY

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CHALLAGATTA VALLEY

• NUMBER OF WORKS : 3

• LENGTH OF SEWERS : 6.7 KM

• LENGTH OF GRP SEWERS : 1 KM

• COST OF WORKS : Rs. 9.14 Crores

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KORAMANGALA VALLEY

• NUMBER OF WORKS : 13

• LENGTH OF SEWERS : 30.7 KM

• LENGTH OF GRP : 6.3 KM

• COST OF WORKS : Rs. 44.36Crores

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MAP SHOWING IDENTIFIED SEWERS IN KORAMANGALA AND CHALLAGHATTA

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TAVARAKERE VALLEY

NUMBER OF WORKS : 6

LENGTH OF SEWERS : 7.6 KM

COST OF WORKS : Rs.4.14 Crores

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MAP SHOWING IDENTIFIED SEWERS IN TAVARAKERE

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NECESSITY FOR CC-TV SURVEY

• TO ASSESS THE CONDITION OF MAJOR

SEWERS

• TO CREATE A DATA BASE ON SEWERS AND

MANHOLES FOR LINKING TO GIS

• TO SUPPORT THE REGULAR O&M

• TO ARRIVE AT A REALISTIC SCHEDULE OF

PREVENTIVE MAINTENANCE

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SUMMARY OF COSTS

• REHABILITATION OF SEWERS IN ALL THE VALLEYS : Rs.85.53 Crores

• PROVISIONAL SUMS TOWARDS - FOR CC-TV & CONDITION ASSESSMENT SURVEY : Rs. 10.00 Crores

• Consultancy fee : Rs. 0.87 Crores

• Contingencies : Rs. 3.60Crores

TOTAL : Rs. 100.00 Crores

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PLAN OF ACTION & TARGETS

Step-1: Preparation of DPR (In Progress)

Step-2: Invitation To Tenders, Evaluation and

Award of Contract– within 3 months

Step-3: Completion of Works in 24 Months

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MEASURABLE OUT COMES and SOCIAL BENEFITS

1. About 110 MLD of raw sewage from all the Seven Major and Minor valleys could be brought into the system after completion of this project.

2. About 40,000 population residing in the core area of the City and some portions of the core interfacing with peripheral areas will be directly benefited out of the proposed new sewerage facilities.

3. About 5 lakhs population in the core area of the City will be benefited from the risk of direct exposure to raw sewage flowing in the open drains.

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OTHER SOCIO ECONOMICAL BENEFITS

• Zero Discharge of Raw Sewage into Storm Water Drains

• Clean living Environment• Reduction in damaged Assets• Improved water quality in Lakes• Improved Ground Water Quality• Improvement in fish life and aquatic ecology• Improved Aesthetics• Improvement in Public Health & quality of life• Appreciation of property values• Socio-Economic Improvement

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