A Study of Clean Water Supply After Earthquake at Lombok Utara Regency, Indonesia

Clean water is the most important thing for human health, communities, and economy. Safe drinking water is required to ensure public health. One option to obtain clean water is by being a customer of Regional Drinking Water Company (RDWC). However, the pipelines of RDWC can experience damage in natural disaster-prone areas. Lombok Utara is one of the regencies in Indonesia which often experiences earthquakes. Earthquakes occurred at Lombok Utara Regency in Lombok Island last July and August 2018 with magnitude 6.4 MW and 6.9 MW, respectively. The Lombok Utara people obtained clean water from its RDWC with main water source from Jongplangka spring with total capacity 137 L/s. The objective of this study is to evaluate the condition of the Jongplangka Pipelines Network of Lombok Utara Regional Drinking Water Company (RDWC) before and after the earthquakes by using software WaterNet Beta3-19 version and to propose alternative clean water sources for mitigation effort. Results showed that some pipes have important roles that affect the other pipes at their downstream side. Thus, Lombok Utara RDWC shall consider the simulation result of WaterNet to reduce the risks if those pipes experience damages. Lombok Utara Island has groundwater potential, so drill wells construction was proposed to fulfill the clean water demand after the earthquake. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.