Improving the Water Distribution System to Support a Future Water Demand in the Western area of Chao Phaya River

Abstract

Bangkok and its vicinities’ city areas are expanding and are requiring the higher water supply from the Maha Sawat and Bang Bua Thong service areas of the Metropolitan Waterworks Authority. As a result, the existing water network system’s water pressure may decrease and be inadequate to supply the water to the service areas. The study utilizes the water pipe network model, EPANET, of the Maha Sawat and Bang Bua Thong service areas that has been calibrated previously. The model was satisfyingly calibrated and accepted by balancing the water volume and pressure level. In this research, the model is used to evaluate the existing pipe network system of the study area under the future water demand condition in the next five years. Then, the model is used to define optimal location of a new pumping station that needs to increase the water distribution system efficiency and its stability. Five proposed location that need to increase the water distribution system are assumed to use the same pumping pattern and supply pressure. Each pumping station supplies a pressure head at least eight meters and use the water pressure multipliers from the Phet Kasem pumping station for each period. By using the average water pressure and the contour pressure of water distribution area as an indicator comparing the five pumping locations individually, the result showed that the best location of the new pumping station is located on Highway No.345 km.5+735.00.