Objective and Purpose of the Assignment
 | The Water Supply Engineer will be a team member of the project preparatory team to conduct due diligence (technical, economic, financial, environmental, and social safeguards, institutional, and gender assessments) for the proposed Climate Resilient Sustainable Water Supply and Sanitation Project in Sri Lanka. The Water Supply Engineer will work in close collaboration with the National Water Supply and Drainage Board (NWSDB) project staff, consultants and report to the ADB project team leader (PTL) preparing the project. Project Summary The project will provide improved water supply services in western and southern provinces. Improved sanitation services will be provided in the northern province. Interventions in the Western Province will enhance water availability and water reliability in the Greater Colombo and adjoining areas. These towns face (i) increasing water demand due to the fast development of new and vertical settlements and (ii) unsatisfactory water services level. This will achieve through; (i) increase water production capacity in the Ambatale water treatment plant by 50,000 m3 per day, (ii) reduce NRW in the Kolonnawa water distribution areas where present NRW is over 30% and (iii) improve water transmission and distribution systems. The Southern Province towns of Lunugamwehera and surrounding areas (i) are located in the dry zone rural areas at strategically potential economic growth of urbanized centres, tourist hotspots and the Mattala International Airport; (ii) need to address groundwater quality issues due to geological formations with high fluoride, iron, calcite, and manganese, and potential saline intrusion; and (iii) need to expand the water coverage to unserved areas and new settlements. Safe and reliable water supply in the area will be provided through strengthening the water treatment capacity of existing water treatment plant capacity from 17,000 m3 per day to 37,000 m3 per day and expanding and strengthening water transmission and distribution system. In the northern province main city of Jaffna, water supply services have been improved by ADB supported Jaffna Kilinochchi water supply project. The proposed intervention under this project to implement a wastewater management system for densely populated areas of the Jaffna peninsula. The proposed wastewater treatment plant capacity is 7,000 m3 per day. The project will be aligned with the following impact: sustainable and resilient water and sanitation solutions ensuring consumer satisfaction provided. The project will have the following outcome: access to efficient, reliable, and safe water supply and piped sewer services increased. The project has the following major outputs: Output 1. Water supply infrastructure improved. The project will support NWSDB in (i) enhancing service levels in the Greater Colombo to meet the increasing demand, and by NRW reduction and enhanced water production; (ii) expanding water supply coverage in the Southern Province, by switching from ground water to surface water sources to address water quality issues; and (iii) implementing wastewater system in the Northern province. Output 2. Institutional capacity strengthened. The project will support NWSDB by (i) improving its project management capacity; (ii) strengthening managerial and technical capacity of its NRW unit through the development of a practical setup, including areas of energy saving concepts and GIS based asset management principles; (iii) transforming institutional capacity on gender and the gendered nature of water use; and (iv) strengthening the environmental and social safeguards division of NWSDB |
Scope of Work
| The consultant will support NWSDB to (i) design water supply and sanitation projects and, (i) achieve high project readiness (advanced procurement) as per ADB requirements. |
Detailed Tasks and/or Expected Output
| i) The task will include, but not be limited to supporting the NWSDB to: Conduct site visits as required for data collection, verification of existing infrastructure, and confirmation of routing/ground conditions for the pipeline network. ii) Carry out detailed hydraulic modeling and network analysis for the water distribution systems using specialized software (e.g. GIS, WaterGEMS). iii) Design and optimize the pipe distribution network layout, pipe sizes, pressure zones, and service reservoirs (excluding structural design of reservoirs). iv) Select suitable pipe materials, fittings, joint types, pipe bedding, and design necessary accessories like thrust blocks, valves, air valves, washouts, and bulk flow meters. v) Ensure design incorporates provisions for future expansion and complies with NWSDB hydraulic and design standards. vi) Prepare and check pipeline profiles and longitudinal sections for distribution mains. vii) Prepare detailed Bills of Quantities (BOQs) for all piping, civil accessories, and associated construction works including supply and laying. viii) Ensure compliance with NWSDB design manuals, relevant national standards, and project-specific requirements of the ADB. ix) Preparation of tender documents x) Coordinate with Mechanical (for pump requirements), Electrical, Quantity Surveyor (QS), and residents during the design phase. xi) Provide technical inputs and clarifications during design review meetings. xii) Assist in resolving design-related issues during the procurement and implementation stages, including responding to bidder inquiries. |
Minimum Qualification Requirements
| The consultant preferably should have qualifications and specialization in water supply infrastructure development with at least 2 years of experience in designing and implementing urban & peri-urban water supply projects, with a degree in civil engineering from a recognized university. Proficiency in specialized engineering software including: CAD software (e.g. AutoCAD) for profile and layout drawing preparation; and hydraulic modeling software for pipe network analysis (e.g. WaterGEMS) GIS software is preferred. Experience working on donor-funded projects and experience with NWSDB projects is an added advantage. |
