THE EVALUATION OF WATER DISTRIBUTION NETWORK USING EPANET 2.0 FOLLOWED BY THE CALCULATTION OF THE POPULATION GROWTH AND WATER DEMANDS UNTIL 2030 (CASE STUDY: COMORO, ZONE I, TIMOR-LESTE)

Abstract

In Dili the capital of Timor-Leste, supplying clean water in urban areas is the responsibility of Serviço de Água e Saneamento (SAS). The study locates in Comoro, Zone I, Dili, and consists of 1,900 households. The service area uses groundwater as the water source with the transmission of pipelines to two types of reservoirs; rectangular with a volume of 1000 and cylinder with a volume of 600 . This study aims to evaluate and plan distribution network systems in Zone I in terms of hydraulics and operating systems by applying condition modeling using the Epanet 2.0 software. The development of the water distribution network (WDN) begins with projecting the population following the 10-year planning using the Geometric, Arithmetic, and Exponential methods. The collection data is through observations in the study area as primary data. Secondary data is collecting data from SAS, such as the map of water pipelines, piping data, pump data, reservoir data, and number of consumers from the service area. Processing data is the use of MS. Excel to calculate the population size, water demand and analyzing data through QGIS by identifying the water pipelines. Followed by Epanet 2.0, with WDN data, the result is then evaluated with the Regulation of the Minister of Public Works No. 18 Year 2007 (No.18/PRT/M/2007). The Epanet 2.0 results show that the WDN in Zone I has met the pressure requirement from No.18/PRT/M/2007 with an average flow of 19.57 liters/second. However, water velocity still needs improvements since it did not meet the criteria it suggests modifying the pipes into a smaller diameter and addition of pump stations and reservoirs at the location where the velocity did not meet the criteria. For the projection year in 2030, the estimated population is 26,057, with an average daily total water requirement of 48.46 liters/second.