Water & Wastewater Asia Mar/Apr 2019

Water & Wastewater Asia • March / April 2019 28 | FROM THE GROUND Minconsult Sdn Bhd proposes Optimal Asset Improvement programme for water network system The project was completed within six months with Bentley’s WaterCAD By Cyndi Smith, Senior Industry Marketing Director, Bentley Systems STUDYING A MID-SIZED TOWN’S WATER SUPPLY SYSTEM When the water utility for the state of Pahang, Malaysia needed a comprehensive study conducted of the water supply system for a mid-sized town in the area, it appointed Minconsult Sdn Bhd. There were nine water treatment plants (WTPs) with a total capacity of 55,470 cubic metres per day, providing water to 20,186 consumers. These plants were old and in poor condition, containing antiquated and inefficient technology. As a result, the Pahang area faced water shortages and supply pressure was low and inconsistent, often taking one week to restore water supply. Minconsult was responsible for reviewing and studying water demand in the district and making projections of the water demand up to year 2030. The project team also needed to review and analyse the existing WTPs and propose upgrading works to meet water quality standards and increase capacity to serve the projected population growth. The organisation also examined the WTPs and suggested new pipeline installations and storage reservoir refurbishment. These changes to the WTPs would improve the facility to satisfy the projected demand. Additionally, Minconsult proposed newWTPs be erected where necessary to augment the water supply system, and the project team was responsible for surveying the land at these sites. The project had a short deadline of six months. PREDICTING WATER DEMAND Minconsult has provided multi-disciplinary engineering and project management capabilities since 1980, and is one of the most respected firms of independent project managers and consulting engineers in Southeast Asia. Their role in the project was to provide consultancy services to carry out the comprehensive study of the existing water supply system, to identify weaknesses and shortfalls, and to propose economic solutions. The project team’s study and recommendations would alleviate many of the problems with the supply system and ensure that water disruptions and shortages would not reoccur. The team’s objective was to evaluate, ascertain, and study the entire water supply system and provide recommendations for upgrading the components so that there would be adequate water supply to cater to future demand up to 2030. The deliverables and expected outcomes would include the proposed asset replacement and refurbishment and the cost plan with proposed scheduling up to 2030. However, the team faced many challenges, including a very old water network, a tight deadline of six months, and a limited core team of one team leader, one modelling specialist, and two engineers. Team members also needed to schedule asset improvements and construction so that funding would be distributed without straining the financial resources. DEVELOPING AN IMPROVEMENT PLAN To overcome these challenges, Minconsult leveraged Bentley’s WaterCAD to develop the improvement plan. To help users consider many different situations and possible design options, the team used the application to analyse 28 various design and operation scenarios and compare them using scenario management and graphing, improving the decision-making process. What-if-scenarios, criticality, and isolation valve features were instrumented in the network system analysis.