Successfully reported this slideshow.
We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. You can change your ad preferences anytime.

Mahesvaran CN - UEI Day 2 - Kochi Jan18

95 views

Published on

Mahesvaran CN - UEI Day 2 - Kochi Jan18

Published in: Education
  • Be the first to comment

  • Be the first to like this

Mahesvaran CN - UEI Day 2 - Kochi Jan18

  1. 1. Water Supply & Management Presented By Dr.C.N.Mahesvaran IAS Managing Director, Tamil Nadu Water Supply and Drainage Board
  2. 2. Total Area Districts Unions Corporations Municipalities Town Panchayat Village Panchayat Rural Habitations Population – 2011 Rural 51.60 % Urban 48.40 % Total 130,059 sq.km 32 385 12 124 528 12,524 1,00,204 372.30 lakh 349.17 lakh 721.47 lakh Tamil Nadu - Profile
  3. 3. CWSS Maintained by TWAD Board Total CWSS - 553 Nos Designed quantity - 2073 MLD Supplied Quantity - 1919 MLD Sl No Name of Beneficiary No. of Beneficiary Designed Quantity (in MLD) Supplied Quantity (in MLD) 1 Corporations 8 265 211 2 Municipalities 66 264 213 3 Town Panchayats 324 334 327 4 Rural Habitations 47136 1066 1071 5 Industries/Commercial Organisations 532 144 98 TOTAL 48066 2073 1919 (93 %) 3
  4. 4. Surface Water Sources Intake Well Off-Take Well
  5. 5. Open Well Bore Well Infiltration well Collector well Ground water & Sub-Surface Water Sources
  6. 6. Types of Schemes Hand pump Mini power pump Individual Power pump Combined water supply scheme
  7. 7. What is to be managed ….. • Quantity daily water supply – monitored thro online (in_house maintenance portal ) • Daily pumping • Assets rectification details( breakdown listing) • Retrieval of weekly/monthly/seasonal/annual supply data • Water quality monitoring surveillance and mapping • System maintenance by TWAD manpower/outsourcing to manage • Head works • Water treatment plant • Sump or booster stations • Water conveyance(pumping/gravity/feeder mains)up to SRs • Distribution grid from SRs managed by local bodies • Billing and water tariff collection • TWAD Board ends up with an annual revenue deficit of about Rs.316 crore during 2015-16 and Rs.430 crore during 2016-17 • Deficit bridged by gap filling fund from Govt. of Tamil Nadu
  8. 8. Tamil Nadu River Basin Normal Annual Rainfall 977 mm Number of Basins 17 Surface Water Potential Storage in 79 Reservoir 243 TMC Storage in 39000 Tanks 347 TMC Other Storages 2 TMC Contribution from other State 261 TMC Total 853 TMC Average Run Off 177 TMC
  9. 9. Tamil Nadu State - Geology • Total area 130059 Sq.Km • Hill Area– 22000 Sq.Km • Tamil Nadu State has a long coastline of 1075 kilometers • 73 % hard rock - Groundwater occurrence restricted to fractures, fissures and joints • 27% unconsolidated sedimentary formation • Quantity is problem in hard rock environ • Quality is constraint in Sedimentary Utilizable Ground Water Potential - 734 TMC Net extraction(draft) - 622 TMC Balance available - 112 TMC
  10. 10. Description Demand/ Availability in TMC Total Assessed Water Resources 1587.00 TMC (853 Surface +734 Ground water) Drinking Water demand 72 TMC Irrigation demand 1766 TMC Industries, Power, Live stock 77.40 TMC Total Demand 1915.4 TMC Gap (Demand – Availability) 328.40 TMC Demand and Availability gap
  11. 11. Issues in water resource management ….. • Sources of water supply – Quantitative threats • Bore well sources failed due to depletion of ground aquifer • Reduced yield due to failure of monsoon • Sources of water supply – Qualitative threats • Surface water • Polluted by Industrial output , • Mixing of sewage either in raw form or in treated form • Sub surface and ground water – • Increased TDS due to over drawal, • Sea water intrusion, • Depletion of aquifer, • Contamination of salts in the local vicinity etc. • Sources of water supply – Water security threats • Supply demand gap • Increase in waste volume and water contamination • Infrastructure inadequacies
  12. 12. Management perspectives ….. • Social • Water sharing • Water conveyance across the local bodies • Unauthorised/ Illegal tapping • Infrastructure issues • Long distance pumping • Detecting contamination hot spots • Increase in energy cost and need for energy conservation • In adequate scientific infra for smart systems • Source sustainability issues • Over exploitation • Lack of perennial rivers • Insufficient recharge • Climate change related weather events • Adverse weather events (floods and drought) • High intensity storms(like Oekhi) • Short duration heavy intensity rainfall • Long duration drought
  13. 13. Management perspectives ….. • Water pricing issues • Subsidized water tariff • Lack of political will for fair pricing • Multiplicity of players implicate an umbrella organization • Water Resource management by PWD/agriculture/forests/local bodies • Drinking water supply does not gain the requisite priority in PWD • Storm water drains managed by local bodies/Highways without holistic planning could not end up in connecting with a water body.
  14. 14. How can our blue planet be running out of water? When will we run out of water? Can we recycle water? Issues in water resource management
  15. 15. Problems Identified SCARCITY UNEQUAL DISTRIBUTION
  16. 16. The way in which research outputs have been used to improve the fresh water monitoring frameworks & data ….. • Sources of water supply • Protecting the sources from contamination – periodically analyzing the raw water quality and predict the source of contamination if any – stringent legal action to stop pollution • Scientific source finding techniques • Constructed rain water harvesting structures • Diluted TDS of ground water , • Preventing sea water intrusion, • Recharging the aquifer, raising the water table • Reviving the deep and shallow wells • Towards sustainability • Formed mission SuWaSem • Dual water supply • Recycling and reuse • Water Treatment Units • Disinfection arrangements made at intermediate nodes
  17. 17. The way in which research outputs have been used to improve the fresh water monitoring frameworks & data ….. • Pumping units • Variable Frequency Drives installed in major water supply pumping stations as a result energy savings of @ 15% could be been achieved. • Conveyance networks • SCADA (Supervisory Control And Data Acquisition) systems . depicts the behavioral patterns of the network • The hydraulics throughout the network could be monitored in real time thereby minimizing the losses due to leaks and bursts. • Illegal tapping if any could be identified by the trends depicted by the SCADA systems • Remote operation of valves
  18. 18. The way in which research outputs have been used to improve the fresh water monitoring frameworks & data ….. • Conveyance networks • Surge vessels are provided to resist the water hammer • Regulated by flow control devices at feeder mains targeting controlled distribution to the beneficiaries • Pipe polices framed eliminating AC Pipes, any other pipes less than 90 mm in feeder mains • Developed in house online monitoring portal
  19. 19. • Water resource management to mitigate supply demand gap under an umbrella organization in view of multiplicity of players • Desalination practices with improved membrane technology • Recycle/reuse of sewage treated effluent in Industy/Agri/Recharge • Smart grids for CWSS to improve functional efficacy • Data collection and management from multiple channels • Water conservation by mission mode • Sea water ingress along coastline and water quality mapping • Climate vulnerabilities, risk mapping and design of resilience infras Current R & D Needs to facilitate Water Supply Monitoring the gaps
  20. 20. • Towards sustainability • Formed the mission SuWaSem • To ensure water security in Urban local bodies thro rain water harvesting • To make ground water based sources sustainable • To restore and rejuvenate water bodies • To promote recycle and reuse of waste water for non potable use • To impart training on desgin and maintenance • To create awareness among stakeholders • Formation of industrial water supply grids Current R & D Needs to facilitate Water Supply Monitoring the gaps
  21. 21. 21 Thank you
  22. 22. • Towards sustainability • Formed the mission SuWaSem • To ensure water security in Urban local bodies thro rain water harvesting • To make ground water based sources sustainable • To restore and rejuvenate water bodies • To promote recycle and reuse of waste water for non potable use • To impart training on design and maintenance • To create awareness among stakeholders The mission SuWaSem
  23. 23. Source Creation – Best Practices METTU SALAI HABITATION • Ground water Prospects maps were extensively used in the field to identify the sources. • The drilling results are encouraging to manage the drought situation in Tamil Nadu
  24. 24. HGM maps showing high yielding Bore wells
  25. 25. Success in Source Creation • TWAD Board has fixed bench mark of 50 LPM as successful bore well. • 92 % success has been achieved using Ground water prospects maps. • The Urban and Rural local bodies are effectively using the Ground water prospects maps for source creation during the regular and drought programmes Name of CWSS Location Dia in mm Depth in m Yield in lpm T. Sindalacheri CWSS Ayyam patty, 150 160 376 Ayyam patty, 150 165 376 Thadi cheri CWSS Koduvalar patty 150 180 370 150 180 370 Sankarapuram CWSS Head works 150 125 134 Kuchanur 150 180 197 Sangara puram 150 180 134 Veppam patti cwss Head works- Seeliam patty 150 124 276 150 121 321 150 65 276
  26. 26. Check dam location • The suitable type of Recharge Structures are marked on the HGM Maps • Most of the recharge structures are identified on or nearer to the fracture systems / DW Sources Source Sustainability– Best Practices
  27. 27. In Tamil Nadu 12558 Recharge Structures have been created to make the Drinking water sources sustainable. CheckDam Percolation Pond Recharge Pit Recharge Trench Ooranies Defunct Borewell Recharge Shaft Roofwater Harvesting Hydro fracturing Others Total 8400 390 275 648 757 177 872 885 53 101 12558 Recharge Structures Implemented From the Year 2001-2015
  28. 28. Over all Ground water improvement by Recharge Structures • Salem District is one of the hard rock areas where the ground water is usage is more and ground water availability is less. • 769 are Check Dams have been built in the District. • In Salem District most of the TWAD observation wells (41 OB wells) are located nearer to the recharge structures constructed.
  29. 29. • The Pre and Post monsoon Ground water level data collected since 1991 indicates the increasing trend. • Ground water level increase is from 2005 onwards. • The may be due recharge structures constructed in scientifically identified location
  30. 30. Case Study - 1 Identification of leak On 15.11.07, Reduction in water flow at MSR and BSR was felt. On analysis of SCADA screen a drop in pressure at 8.00 am at Veerapandi pirivu (LS17221) was noted. The field staff sent on reconnaissance reported a leak at LS 23620 of the CWTM. Pumping was stopped at 3.05 p.m. After attending the leak pumping commenced again 3.40 am on 16- 11-07.
  31. 31. Case Study – 2 - Identification of leak On19.11.07,Water level in BSR was depleting fast. On a review of SCADA screen a simultaneous pressure drop at BSR outlet and Singanallur at 11.30 AM was noticed. The field staff sent on reconnaissance reported a leak between BSR and Singanallur. Further investigations revealed an earthmover has damaged an air pipe at LS 40000 of CWTM at 11.30 am The leak has since been attended.
  32. 32. Case Study –3 - Monitoring of intermittent flow Supply to the Military Defence Establishment at Madukkarai is given for 2 hours daily in the morning. From the trend curve at Madukkarai, a pressure drop from 4.48 am to 6.48 am (Actual supply hours) could be seen.
  33. 33. Case Study - 4 - Monitoring of Power interruptions at pump houses In the adjoining screens sudden drop in pressure in the pump delivery side at 6.35 am and surge again at 7.09 am indicates stopping of pumping. Actual hours of pumping at each pumping station could be easily monitored.
  34. 34. Sl.No Name of District Name of CWSS Year of Installation 1 Coimbatore Pillur CWSS 2006 -07 2 CWSS to 249 Hab 2009-10 3 CWSS to 295 Hab 2010-11 4 CWSS to Tirupur corp. and 417 Hab 2012-13 5 Tiruppur CWSS to Muthur Kangeyam 2009-10 6 Salem Salem and 11 other TPs 2010-11 7 CWSS to Rasipuram and Edappadi 2010-11 8 CWSS to Kadayampatti 2011-12 9 CWSS to Irupali and 1066 habitations 2011-12 10 Trichy CWSS to 674 Hab 2008-09 11 Ariyalur CWSS to 227 Hab 2009-10 12 Nagapattinam CWSS to 893 Hab 2012-13 13 Thirunelveli CWSS to Manur 2009-10 14 CWSS to 4 RTP and 151 Hab 2010-11 15 CWSS to Kadayanallur and Puliyangudi 2008-09 16 CWSS to Nanguneri - Thisayanvilai 2013-14 17 Ramanthapuram CWSS to Ramnad, Sivagangai, Pudukkottai 2012-13 18 Dharmapuri Hogenekkal CWSS and Fluride Mitigation Programme 2013-14 SCADA PROVIDED IN CWSS MAINTAINED BY TWAD BOARD
  35. 35. 53 Surge vessels are provided with standby units for water hammer effect in the 1500 MS pumping main.
  36. 36. Content of this presentation 1. Background 2. About PFR prepared by TWAD Board 3. Recommendation of TNIDB 4. Details of Ponneri & Hosur Nodes 5. Present Stage of Investigation 6. Issues
  37. 37.  ‘Formation of WS Grid along CBIC’ Project was announced (No.14) during the Demand No.34 for the year 2014-15  Govt of Tamil Nadu have directed TWAD Board to take up detailed investigation  CMWSSB had informed that 724 MLD of treated sewage is available to spare, at the rate of 12.50/KL (5% hike every year)  Cost of Investigation estimated as Rs.8.50 Crore 1. Background
  38. 38.  As per the draft plan proposal of JICA, Industrial Corridor falls in seven Districts, in TN  PFR prepared for covering 10881 industries (Excluding 4852 CMWSSB beneficiaries) falling at 75 km on either side of the corridor, with a total demand of 997 mld  To make the Project implementable, the Project was split into four Phases  Tentative total cost is estimated as: Installation cost : Rs.13625 Crore Annual Maintenance Cost : Rs. 1339 2. About the PFR prepared by TWAD
  39. 39. Description Projection Intermediate (2033) Ultimate (2048) Present Obtained from TNPCB 368 368 Upcoming industries Obtained from line departments 264 427 Future industries Projected based on availability of land 124 202 Total 756 997 Fresh water 306 400 Treated water 450 597 2.a.Demand in MLD
  40. 40. 2.b. Details of Clusters Pha -ses Clus - ters No. of Indus -tries Water Demand in MLD Name of Clusters Fresh Treated Total I 7 2159 143 262 405 Ambattur, Gummidipoondi, Thervoy kandigai, Madhavaram, Ponneri, Poonnamallee & Thiruvallur II 17 3118 169 130 299 Kandigai, Mahendra world city, MM Nagar near Ford Chengalpattu, Cheyyur, Silk park, Irunkatukottai, Oragadam, Pillaipakkam, Sriperumpudur, Vallam- Vadakal, Nemmeli, Tambaram, Thirukalunkundram, Siruseri, Thiruporur & Maduranthagam III 7 2929 24 64 88 Thiruthani, Ambur, Arakkonam, Gudiyatham, Vellore, Vaniyambadi & Walajah IV 15 2675 64 141 205 Arani, Cheyyar, Polur, Thiruvannamalai, Dharmapuri, Palacode Pappiredipatti, Hosur SIPCOT Ph-I, Hosur SIPCOT Ph-II, Hosur SIPCOT Ph-III & IV, GMR Unit-I at Shoolagiri, SIPCOT Denkanikottai, GMR Denkanikottai, Krishnagiri & Pochampalli Tota 46 10881 400 597 997
  41. 41. Phase I* Phase II* Phase III* Phase IV* Phase Wise Pumping Main Alignment DSP Plant TTRO Plant
  42. 42.  To carry out surveying & Levelling works in the entire Project area  To prepare DPR for Ponneri & Hosur Industrial Nodes.  SWRO Plant 1 No. & TTRO -1No for Ponneri Node  TTRO -1No for Hosur Node  Sanctioned Rs.3.20 Crore, under ‘PPF’, towards the cost of outsourcing works. 3. Recommendation of TNIDB
  43. 43. 4.Details of Ponneri & Hosur Nodes Node Ponneri Node Hosur Node No. of Clusters 7 6 Demand Fresh water - Intermediate 92 mld Ultimate 143 mld Treated water - Intermediate 185 mld 22.72 mld Ultimate 262 mld 22.72 mld Source SWRO Proposed 1 no @ Minjur Capacity 92 mld TTRO Proposed 2nos @ Kodungaiyur & Koyambedu Existing STPs of CMWSSB Kelavarapalli Dam Capacity in MLD(150 &72) 185 mld 22.72 mld Project Cost 4273 Rs. Crore 185 Rs. Crore AM Cost 447 Rs. Crore 28 Rs. Crore Cost per KL (on Capital & AM Cost ) Rs.81 Rs.51.32
  44. 44. Ponneri Node
  45. 45. Ponneri Node - Distribution Stations - Demand Sl No Name of distribution point Number of Industrie s Total Reqt in MLD (Intermediate 2033) Total Reqt in MLD (Ultimate 2048) Fresh water Treated water Total Fresh water Treated water Total 1 Ponneri 331 63.07 132.70 195.77 108.27 201.32 309.59 2 Ambattur 575 5.66 2.59 8.25 6.97 3.19 10.15 3 Gummidi poondi 305 2.75 17.13 19.87 3.38 21.08 24.46 4 Thervoy Kandigai 55 1.85 14.12 15.97 1.85 14.12 15.97 5 Madhavaram 64 0.18 0.54 0.72 0.22 0.66 0.88 6 Poonamallee 337 13.63 12.12 25.75 16.78 14.91 31.70 7 Tiruvallur 492 4.70 5.56 10.25 5.78 6.84 12.62 Grand Total 2159 91.84 184.76 276.58 143.25 262.12 405.37
  46. 46. Hosur Node
  47. 47. Hosur Node 1. Quantity of Raw water allotted to TWAD from Kelavarapalli dam : 27.27 MLD 2. Treatment losses at 20%: 4.55 MLD 3. Quantity available for Industries : 22.72 MLD Sl No. Beneficiary Raw water requirement in MLD Treated water requirement in MLD 1 SIPCOT-I 5.46 4.55 2 SIPCOT-II 5.46 4.55 3 M/S TVS Motor 1.20 1.00 4 GMR SEZ-I 3.00 2.50 5 GMR SEZ-II 9.00 7.50 6 SIPCOT Addakurukki 3.15 2.62 Total 27.27 22.72
  48. 48. Pre-Feasibility Study:  Industries in CBIC region, falling under the purview of TWAD Board had been identified  Demand Assessment completed  Sources Identified  Pre Feasibility Report prepared Detailed Investigation:  Surveying and Leveling works in entire CBIC region completed (1605 km).  Tenders are under scrutiny for the consultancy assignment, for preparation of DPR for 1 No of SWRO Plant & 2 Nos of TTRO plants.  Expenditure incurred as on date is Rs.2.00 Crore 5. Present Stage of Investigation
  49. 49. Present Stage of Tenders Details SWRO TTRO Tender I call 08.12.2015 08.12.2015 Tender Response 2 Responses No Response Tender II Call - 08.01.2016 Tender Opening 08.12.2015 08.01.2016 List of Tenderers 1.M/s Mecon Ltd. Bangalore 2. KG-DS Coimbatore 1. EIL Ltd, Delhi. Rate quoted Rs. 143.00 Lakhs Rs. 144 Lakhs Rate after negotiation Rs. 83.00 Lakhs Rs. 113.00 Lakhs Excess percentage +10.60% +25.55%
  50. 50.  Capacity of TTRO plant proposed at Kodungaiyur-150 mld  Land required at Kodungaiyur STP- 40 Acres  Capacity of TTRO plant proposed at Koyambedu-72 mld  Land required at Koyambedu STP- 25 Acres  Consent of CMWSSB is required for sparing of 65 Acres of land.  CMWSSB was addressed to spare land on 25.05.2015  CMWSSB stated on 23.06.2015 that, they would take care their demand  The Principle Secretary addressed in this regard on 6. Issues
  51. 51. Ponneri & Hosur Node PONNERI NODE* No. of Clusters -7 277/405 MLD HOSUR NODE* No. of Clusters -6 22.72 MLD
  52. 52. 1.2. Present Demand As per the data of TNPCB (12/2014), Present demand of Industries under the scope of TWAD & CMWSSB have been arrived follows: Details TWAD Board Present (2014) CMWSSB Present (2014) Total Total Number of industries (Nos) 10881 4852 15733 Fresh water demand in mld 174 121 295 Treated water demand in mld 194 224 418 Total demand in mld 368 345 713

×