System dynamics model for sustainable water supply strategy in Sentul City area

Abstract

Good management of water resources is a requirement for an area with a high population development. Sentul City, which is an independent city in Bogor Regency which has a high population, is in an area that lacks water. Because of this, Sentul City requires infrastructure and policies that can ensure the availability of water for its residents. One of the paradigms of water management in urban areas is a water-sensitive city. One of the steps in this paradigm is wastewater management and rainwater harvesting. The system dynamics modeling method is used to predict the impact of implementing several policies that will be taken to manage water resources. This study aims to build dynamic models to predict water supply and demand and analyze policies for wastewater management and rainwater harvesting. Sentul City water demand is estimated will reach 122 105 000 m3, and a water crisis will occur in 2027. The wastewater recycle policy can inhibit water crisis until 2030, and the negative water balance will last until 2040. Combining wastewater recycle and rainwater harvesting can increase water availability by 240% and prevent a water crisis.