AMRUT 2.0 Providing 24X7 water supply at Aranoor ward Thiruvananthapuram Municipal Corporation Pipeline Work

OD101050/2026-2027:Conducting Comprehensive Water Audit and Survey for Aranoor Corporation Ward under the proposed 24×7 Water Supply Project, including collection of field data, engineering investigations, analysis, hydraulic modelling, preparation of GIS-based MIS based on the hydraulic model, NRW assessment by using the GIS based MIS, water balance, energy audit, and submission of critical hydraulic model for of District Metered Areas (DMAs). The item shall include all labour, technical personnel, survey equipment, software for GIS based modelling and related MIS based on the model, transport, data collection, monthly analysis , monthly report preparation, activities to reduce NRW based on monthly reports and evaluation of its effectiveness and submission of final deliverables, complete as directed by the Engineer-in-Charge. The scope of work shall include, but not be limited to, the following: Baseline Assessment GIS based modelling of the existing water supply system from source to consumer. Design and isolation of supply zones/District Metered Areas (DMAs) with critical number of connections. Assessment of existing water demand and supply patterns. Collection and review of available records including design drawings, O&M records, consumer database, billing records, asset information and previous studies for the preparation of the model. Water Source Assessment and technical recommendation for relevant modifications Assessment of quantity and quality of available water sources by taking the hourly level and quality sensors and integrating with the MIS Technical Evaluation of reliability and sustainability of water sources using the GIS model. Collection and transmitting of pressure, quantity and quality data using sensors at critical locations and suitable transmitting mechanism and analysis of source-wise using the model after calibration of the GIS based hydraulic model with field situation Infrastructure Evaluation using the GIS based hydraulic model Daily Physical inspection of transmission and distribution systems including pipelines, valves, bulk meters, service reservoirs, pumping stations and associated appurtenances for calibration of the hydraulic model. Physical condition assessment of treatment plants, pumping stations and storage reservoirs and suggesting technical recommendation for any modification for NRW reduction or 24 x 7 supply. Running the GIS-based hydraulic model at 3 hourly intervals and conducting predictive analysis for finding the water loss after observing pressure drop positions in the water distribution network and conducting pro-active leak detection and rectification wherever required as per the prediction analysis. Identification of bottlenecks, pressure-deficient areas, critical assets, leakage-prone locations and operational deficiencies and suggesting recommendations and physical rectification. Leak Detection and Non-Revenue Water (NRW) Assessment as per norms and reporting monthly to show improvement of NRW. Leak detection using acoustic equipment, pressure monitoring, visual inspection and other suitable techniques wherever pressure drops are predicted by the model. Measurement and assessment of minimum 24-hour continuous flow at designated inlet/outlet locations using calibrated ultrasonic water meters or equivalent approved instruments to assess the total quantity in the DMA. NRW assessment by comparing System Input Volume with Authorized Billed Consumption and recommend technical as well as management related solutions with people participation to reduce NRW. Component-wise analysis of NRW using the hydraulic model including the following and giving training to 4 KWA staff to assess the NRW using the model: Real losses (physical leakage), Apparent losses (meter inaccuracies, unauthorized consumption), Unbilled authorized consumption. Water Balance Preparation Preparation of a comprehensive water balance in accordance with IWA Water Balance Methodology. Quantification of water losses and unaccounted-for water. Calculation of key performance indicators including NRW (%), Infrastructure Leakage Index (ILI), Water Loss per Connection, and other relevant performance indicators. Energy Audit Assessment of energy consumption at pumping stations and treatment facilities. Evaluation of pump efficiency and operational performance. Identification of opportunities for energy conservation and reduction of operating costs and submitting recommendations, timely implementation and submitting benefit analysis and report the savings. Development and calibration of GIS based hydraulic model and building and MIS to work on the same using any internationally recognized GIS based hydraulic modelling and prediction software tools. Simulation of existing and proposed network conditions and recommendations and Action Plan for gradually making changes in the field to come closer to the proposed condition with monthly reports showing monthly outcome. Evaluation of quality, pressure, flow, velocity, storage requirements and operational scenarios for continuous 24×7 water supply recommend and implement corrective actions in the field inside the DMA and make necessary changes in the model and prove the same with model out puts as well as field outputs. Validation of model and creating provisions to take the live data transmitted from the sensors at 1 hour intervals to the model and tallying it physically with actual physical field observations and flow measurements. regular Recommendations and Action Plan and implementation to achieve NRW reduction and 24 x 7 norms and regular reporting. Recommendations for improving DMA management supported by model out put and actually implementing the physical interventions with proof of results. Pressure management strategy using the model and implementation and proving the outcome. recommendations for Metering and billing improvement, physical implementation by related KWA intervention with regard to consumers in the DMA. Rehabilitation, replacement and augmentation proposals for transmission and distribution systems. Leakage reduction programme and NRW reduction strategy, its implementation and NRW reduction based on the calculations based on model and physical measurements, both tallying. Phased implementation plan with priority works and cost implications. Monthly Deliverables after the preliminary preparation of model and model calibration but within the period of completion 1. Submission of comprehensive Water Audit Report. GIS based hydraulic model details, software specification, network maps giving training to 4 KWA staff on GIS based modelling and prediction software tool. Hydraulic model files and sharing the user access to 4 KWA staff for getting trained, verification and confirmation of the model and predictions. Water balance sheets. NRW assessment report. Energy audit report. Implementation and output analysis report of each Recommendations for implementation of 24×7 Water Supply System.

100.59.1:Cutting the bituminous / concrete roads with cutting machine for a minimum depth of 200mm along the sides of proposed alignment of the pipe to be laid without causing any damage to other utilities, including the charges for hire and conveyance of tools and plant, cost of consumables and charges for lighting, watching, ribbon fencing, caution boards, traffic diversion, and as per the direction of departmental officers etc. complete, before carrying out the demolition of bituminous / concrete road by mechanical means and carrying out the excavation.

15.59:Dismantling of flexible pavement ( bituminous courses ) by mechanical means and disposal of dismantled material up to a lead of 1 kilo metre, as per direction of Engineer-in-charge.

15.2.1:Demolishing cement concrete manually / by mechanical means including disposal of material within 50 metres lead as per direction of Engineer - in-Charge.Nominal concrete 1:3:6 or richer mix (i/c equivalent design mix)

16.83:Taking out existing CC interlocking paver blocks from footpath/ central verge, including removal of rubbish etc., disposal of unserviceable material to the dumping ground, for which payment shall be made separately and stacking of serviceable material within 50 metre lead as per direction of Engineer-in-Charge.

16.84:Laying old cement concrete interlocking paver blocks of any design/ shape laid in required line, level, curvature, colour and pattern over and including 50 mm thick compacted bed of coarse sand, filling the joints with fine sand etc. all complete as per the direction of Engineer-in-charge. (Old CC paver blocks shall be supplied by the department free of cost.)

100.1.1:Excavating trenches of required width for pipes, cables, etc., including excavation for sockets, and dressing of sides, ramming of bottoms, depth up to 1.5m, including getting out the excavated soil, and then returning the soil as required, in layers not exceeding 20cm in depth, including consolidating each deposited layer by ramming, watering, etc., and disposing of surplus excavated soil as directed, within a lead of 50m, in all kinds of soil.

100.8.1:Fencing one side of trenches, 1.50m height with two rows of 10cm plastic caution tape in vertical casuarina pole (girth 15cm to 24cm) fixed at 2m intervals.