Improving & Revamping the Existing / Proposed Water Supply Distribution System With
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Improving & Revamping the Existing / Proposed Water Supply Distribution System with Continuous Pressurized Supply to Coimbatore Corporation MMaaiinn RReeppoorrtt && AAnnnneexxuurree Volume – I (a) JUNE APRIL 2013 201 7 FICHTNER Consulting Engineers India Pvt. Ltd. Menon Eternity, 9th Floor, No, 165, St.Marys Road Alwarpet, Chennai - 600018 Tel : +91 – 044 – 45932600, Fax : + 91 – 044 - 45932809 Email : [email protected] Website : www.fichtner.co.in Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM List of Contents Chapters and Appendices LIST OF ANNEXURES LIST OF DRAWINGS v LIST OF TABLES xv LIST OF FIGURES xviii PROJECT SUMMARY 21 1 Sector Background, Context & Broad Project Rationale 25 1.1 Project Site Appreciation 25 1.1.1 Physical & Geographical Characteristics 25 1.1.2 Topography 26 1.1.3 Geology 26 1.1.4 Soil 26 1.1.5 Structure & Tectonics 26 1.1.6 Weathering 26 1.1.7 Alluvium & Kankar 26 1.1.8 Climate and Rainfall 26 1.1.9 Industrial Activities 27 1.1.10 Existing Status of Physical Infrastructure 27 (i) Status of Water Supply Infrastructure 27 (ii) Source - Pillur (Bhavani River) source 28 (iii) Source - Siruvani River Source 30 (iv) Present Water Distribution Zones 30 (v) Master Service Reservoirs 31 (vi) Service Reservoirs 31 (vii) Existing Water Distribution System 34 1.1.11 Seismicity 40 1.1.12 Groundwater Quality and Quantity 41 1.1.13 Financial Status of the Local Body 41 1.1.14 Sewerage Infrastructure 41 1.1.15 Sewage Farms 42 1.1.16 Storm Water Drains 42 1.1.17 Solid Waste Management 43 1.1.18 E-Governance 43 1.1.19 Web site 43 1.2 Existing Tariff and Cost Recovery 44 2 Project Definition, Concept and Scope 45 2.1 Project Area 45 i Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM 2.2 Scope of Work 45 2.3 Objectives 45 2.3.1 Objective: A 45 2.3.2 Objective: B 46 2.4 Selection of Design Basis 47 2.4.1 Flow Reliability Analysis on Pillur Source 47 2.5 Deficiencies of the Existing Water Supply System 51 2.6 Project Benchmarks 52 2.7 Need for the Project 52 2.8 Technical Solutions towards Project Benchmarks 55 2.8.1 Methodology for 24 X 7 WSS 55 (i) Back drop drawing 55 (ii) Operational Zones 55 (iii) District Metering Areas 56 (iv) Hydraulic Model 56 (v) Simulation of DMAS 56 (vi) Bulk Water Meters and Consumer Water Meters 57 2.8.2 Instrumentation for 24 X 7 WSS 57 2.8.3 Disinfection Process for 24 X 7 WSS 61 2.8.4 24 X 7 Customer Care Centre 61 2.8.5 Introduction of Volumetric Rational Tariff 61 2.9 Physical Infrastructure Components 61 2.9.1 Formulation of Design Basis 61 (i) Design Parameters 61 (ii) Population Projection 62 (iii) CDP Observations for Demand Projection 63 (iv) Topographical Survey 81 (v) Soil Investigation 81 (vi) Zoning of Distribution System 84 (vii) Distribution System Network 84 (viii) Consumption Peak Factor 84 (ix) Minimum Residual Head 85 (x) Utility of Existing Pipes 85 (xi) Network Analysis for Looped Distribution System 85 (xii) Elimination of Public Fountains 86 (xiii) Pipe Material 86 (xiv) Trench Size for Pipe Laying 87 (xv) Service Reservoirs 87 (xvi) House Service Connections 87 2.9.2 Field Investigations Done 88 2.9.3 Detailed Engineering Design - Feeder Main System 92 (i) Existing Feeder Main System 93 (ii) Existing Problems in Feeder Main Systems 95 ii Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM (iii) Proposed Feeder Main System 96 (iv) Proposed Feeder Main Alignment 97 (v) Appurtenances Proposed 113 1. Sluice Valve 113 2. Scour Valve 113 3. Air Valve 113 4. Flow Regulating Valves 114 5. Bulk Water Meters and Data Loggers 114 (vi) Observations on Hydraulic Design of Feeder Mains 115 2.9.4 Interlinking of Pillur MSR and Siruvani MSR 117 (i) Appurtenances Proposed 118 1. Sluice Valve 118 1. Scour Valve 118 2. Air Valve 118 2.9.5 Detailed Engineerign Design – Distribution System 119 (i) Zoning of the Project Area 119 1. North Zone 119 2. West Zone 120 3. South Zone 120 4. East Zone or Demo Zone I & II 120 (ii) Rezoned Boundaries 121 (iii) Propsoed Pipe Materials & Sizes 121 (iv) Service Reservoirs 140 (v) Abandoned Sumps & SRs 157 (vi) Appurtenances Proposed 157 1. Sluice Valve 157 2. Scour Valve 158 3. Air Valve 158 4. Pressure Control Valves and Bulk Water Meter 158 2.9.6 Automation of Distribution System – SCADA 159 (i) Introduction 159 (ii) Scope of work 159 (iii) System Design 160 (iv) Proposed System 160 1. SRs / GLSRs in Distribution Network 160 2. Central SCADA Station at MSRs 161 2.9.7 Clearances Required From Other Agencies 162 2.10 Environmental Impact Assessment 162 2.10.1 Objective of EIA 162 2.10.2 Legal and Policy Framework 163 2.10.3 Environmental Assessment and Review Process 163 2.10.4 National Regulations 163 2.10.5 Necessity for this EIA Study 166 2.10.6 Broad Paradigms for Mitigation Plan 167 2.10.7 Resettlement and Rehabilitation Issues 168 iii Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM 2.10.8 Management of Noise Impacts 168 2.10.9 Managing Impacts due to Construction Machinery 168 2.10.10 Managing Impact of Air Pollution 169 2.10.11 Environmental Monitoring 176 2.10.12 Impact during Design Phase 178 2.10.13 Impact during Construction Phase 179 2.10.14 Impact during Operation Phase 181 2.10.15 Impact Identification Matrix 181 2.10.16 Environmental and Social Classification 183 2.10.17 Specialized Services for PMC and Quality Assurance 183 3 Project Cost 184 3.1 Basis of Costing 184 3.2 Land acquisition / Site Development 184 3.3 Physical Infrastructure Component Cost 184 3.4 Rehabilitation & Resettlement Cost 187 3.5 Project Costing 187 3.6 Annual Operation and Maintenance Costs 187 3.7 Institutional Strengthening 189 3.7.1 Training to be imparted 189 4 Project Institution Framework 191 4.1 Roles of Different Institutions 191 4.2 Roles and Responsibility Matrix 192 4.2.1 Role of the Government of Tamilnadu (GoTN) 192 4.2.2 Role of the Coimbatore Water Supply Sector 192 4.2.3 Role of the Coimbatore City Corporation (CCC) 193 4.3 Overall Financial Structuring of the Project 193 5 Project O&M Planning 195 5.1 Institution Framework (Organization & Operations) Strategy 195 5.2 Selection of O&M Operator 195 5.2.1 Preventive Maintenance 195 5.2.2 Quality of Materials 197 5.2.3 Maintenance of Service Reservoirs 197 5.2.4 Maintenance of Water Distribution System 197 5.2.5 Duration and quantity of supply 198 5.2.6 Quality of water received by household 198 iv Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM LIST OF DRAWINGS S.NO DESCRIPTION DWG NO 1 Index & Key Plan 10/1811150/WSS/WIN/001 2 Contour Plan 10/1811150/WSS/WIN/002 3 Ward Plan 10/1811150/WSS/WIN/003 4 Existing water supply system 10/1811150/WSS/WIN/004 5 Existing Feeder Main System 10/1811150/WSS/WIN/005 6 Existing Distribution System 10/1811150/WSS/WIN/006 Feeder Main Drawings Proposed Feeder Main System - Pillur, Siruvani & 7 10/1811150/WSS/WIN/007 MSR Interlinking Plan showing Pillur MSR Outlet Interconnections 8 & MSR SR interconnections at Bharathi Park & 10/1811150/WSS/WIN/008 Ramakrishnapuram Plan Showing the Alignment of Pillur Feeder Main 9 - I (From Proposed MSR at Ramakrishnapuram to 10/1811150/WSS/WIN/009 Proposed SR at Bharathi Nagar - By Gravity) 10/1811150/WSS/WIN/010 10 Flow Diagram for Pillur Feeder Main - I (sheet 1 to 2) Longitudinal Section for Pillur Feeder Main - I & 10/1811150/WSS/WIN/011 11 Branches (sheet 1 to 8) Plan Showing the Alignment of Pillur Feeder Main - II (From Existing MSR at Ramakrishnapuram to 12 10/1811150/WSS/WIN/012 Proposed SR at Lakshmi Nagar Mill Colony - By Gravity) 10/1811150/WSS/WIN/013 13 Flow Diagram for Pillur Feeder Main - II (sheet 1 to 2) Longitudinal Section for Pillur Feeder Main - II & 10/1811150/WSS/WIN/014 14 Branches (sheet 1 to 6) Plan Showing the Alignment of Pillur Feeder Main 15 - III (From Existing MSR at Ramakrishnapuram to 10/1811150/WSS/WIN/015 Proposed Sump at Rakatchi Garden - By Gravity) 16 Flow Diagram for Pillur Feeder Main - III 10/1811150/WSS/WIN/016 Longitudinal Section for Pillur Feeder Main - III & 17 10/1811150/WSS/WIN/017 Branches Plan Showing the Alignment of Pillur Feeder Main 18 - IV (From Proposed Sump at Rakatchi Garden to 10/1811150/WSS/WIN/018 Proposed SR at Jai Nagar - By Pumping ) 19 Flow Diagram for Pillur Feeder Main - IV 10/1811150/WSS/WIN/019 v Coimbatore Water Supply System Detailed Project Report - Revision I Improving & Revamping the Existing / Proposed WSS JNNURM S.NO DESCRIPTION DWG NO Longitudinal Section for Pillur Feeder Main - IV & 10/1811150/WSS/WIN/020 20 Branches (sheet 1 to 4) Plan Showing the Alignment of Siruvani Feeder 21 Main - I (From Existing MSR at Bharathi Park to 10/1811150/WSS/WIN/021 Proposed SR at Housing Unit - By Gravity) 10/1811150/WSS/WIN/022 22 Flow Diagram for Siruvani Feeder Main - I (sheet 1 to 2) Longitudinal Section for Siruvani Feeder Main - I 10/1811150/WSS/WIN/023 23 & Branches (sheet 1 to 4) Plan Showing the Alignment of Siruvani Feeder Main - II (From Existing MSR at Bharathi Park to 24 10/1811150/WSS/WIN/024 Proposed Sump at Sanganur Chinthamani - By Gravity) 25 Flow Diagram for Siruvani Feeder Main - II 10/1811150/WSS/WIN/025 Longitudinal Section for Siruvani Feeder Main - II 26 10/1811150/WSS/WIN/026 & Branches Plan Showing the Alignment of Siruvani Feeder Main - III (From Proposed