Pollution Control Board, Assam Conservation of River Bharalu, Guwahati Detailed Project Report December 2013 Draft Joint Venture of THE Louis Berger Group, INC and DHI (India) Water & Environment Pvt. Ltd. DPR - Bharalu CONTENTS contents i FIGURES vi LIST OF ABBREVIATIONS ........................................................................................................... ix EXECUTIVE SUMMARY ................................................................................................................. 1 1 About the Project Area .............................................................................................1-1 1.1 Authority for preparation of project .............................................................................1-1 1.2 Description of Project Area .........................................................................................1-1 1.2.1 Brief History of the town .............................................................................................1-1 1.2.2 Geographical Location ...............................................................................................1-1 1.3 Population in the Project Area ....................................................................................1-1 1.4 Status of water supply ................................................................................................1-1 1.5 Status of existing waste water disposal system ..........................................................1-1 1.6 Status of drains ..........................................................................................................1-1 1.7 River Water quality .....................................................................................................1-1 1.8 Justification of the project for pollution abatement of the river ....................................1-1 2 Collection of Data .....................................................................................................2-1 2.1 Introduction ................................................................................................................2-1 2.2 Data Required at Different Levels ...............................................................................2-1 2.2.1 Drainage Basin Map ...................................................................................................2-1 2.2.2 Raster Layers .............................................................................................................2-3 2.2.3 Shape Layers .............................................................................................................2-3 2.3 Town Related Data .....................................................................................................2-5 2.3.1 Maps Related to Town ...............................................................................................2-5 2.3.2 Land Use, Contour, Drainage and Other Thematic Maps: ..........................................2-6 2.3.3 Use of State of Art Tools like Remote Sensing and GIS .............................................2-6 2.3.4 Population of the Town ...............................................................................................2-6 3 Conservation Measures ...........................................................................................3-1 3.1 General Conservation Framework ..............................................................................3-1 3.2 Road Map for the Conservation of Bharalu River .......................................................3-1 DPR - Bharalu page i 3.3 Root Cause Analysis & Measures Solution Options ................................................... 3-4 4 Sewerage Schemes ................................................................................................. 4-1 4.1 Status of Existing Waste Water Disposal Works ........................................................ 4-1 4.1.1 Existing Works ........................................................................................................... 4-1 4.1.2 Project under process ................................................................................................ 4-2 4.2 Population Projections of Each District in Design Years ............................................ 4-3 4.3 Projected Waste Water Flows in each District in Design years .................................. 4-5 4.4 Sewage Collection and Treatment Options ................................................................ 4-7 4.4.1 Availability of Land for various Components in each District ...................................... 4-9 4.5 Decentralized Option ............................................................................................... 4-10 4.6 Operation and Maintenance ..................................................................................... 4-14 5 Solid Waste Management ........................................................................................ 5-1 5.1 Introduction ................................................................................................................ 5-1 5.2 Existing Situation ....................................................................................................... 5-2 5.2.1 Quantity of solid waste generation, its composition, and characteristics .................... 5-3 5.2.2 Industrial waste .......................................................................................................... 5-7 5.2.3 Biomedical waste ....................................................................................................... 5-7 5.2.4 Solid waste segregation, collection and storage ........................................................ 5-8 5.2.4.1 Segregation ............................................................................................................... 5-8 5.2.4.2 Collection ................................................................................................................... 5-9 5.2.4.3 Transfer and Transportation of Solid Waste ............................................................... 5-9 5.2.5 Solid waste processing and disposal ....................................................................... 5-10 5.2.6 Organization and Staffing of GMC ........................................................................... 5-11 5.2.7 Major Gaps in the SWM System .............................................................................. 5-12 5.2.8 Identified Key Issues ................................................................................................ 5-14 5.3 Proposed Schemes ................................................................................................. 5-14 5.4 Cost Estimate .......................................................................................................... 5-18 5.5 Implementation Plan ................................................................................................ 5-18 6 River Environment Improvement ............................................................................ 6-1 6.1 Need of an improved river environment ..................................................................... 6-1 6.1.1 Maintaining biodiversity ............................................................................................. 6-1 6.1.2 For the people ........................................................................................................... 6-1 6.1.3 Bridge to Beauty: ....................................................................................................... 6-1 6.2 River Front Development along Bharalu River ........................................................... 6-2 6.3 Borosola Beel Development ...................................................................................... 6-6 page ii DPR - Bharalu 6.4 Cost Estimate .............................................................................................................6-1 7 Other Non-Sewerage Schemes ...............................................................................7-1 7.1 Community toilets .......................................................................................................7-1 7.2 Community Kiosks ......................................................................................................7-2 7.3 Cost Estimate .............................................................................................................7-3 8 Water Augmentation and Channel Improvement Schemes...................................8-1 8.1 River Network .............................................................................................................8-1 8.2 Modelling ....................................................................................................................8-3 8.2.1 Rainfall-Runoff modelling ...........................................................................................8-3 8.2.2 Hydrodynamic Modelling ............................................................................................8-4 8.3 Water Augmentation Scheme .....................................................................................8-6 8.3.1 Re-connecting Bahini River near Nutan Bazar area ...................................................8-6 8.3.2 The Scheme ...............................................................................................................8-8 8.3.3 The New Sluice Gate .................................................................................................8-9