Application of hydrological method for sustainable water management in the Upper-Middle Ciliwung (UMC) river basin, Indonesia

Abstract

Water resources are under pressure due to population growth, economic development, and changes in land use. This study aims to develop a hydrological method for calculating the water availability and evaluating the water supply demand capacity using the Index of Water Supply-Demand (IWSD), based on a case study of the Upper-Middle Ciliwung river basin in Indonesia. The two hydrological models used in this study were the National Rural Electric Cooperative Association (NRECA) and "FJ. Mock" models. The NRECA model was selected based on a statistical evaluation of correlation coefficients and the volume of errors. Based on the evaluation of business as usual and a reduction in water availability scenarios, the IWSD shows a value > 0, which means that the river can supply the necessary water for the economy, society, and environment. For other scenarios, with an increase in population growth and mix scenario, the IWSD shows values < 0, which means that the river cannot supply water for the users. The applications of the hydrological methods were developed in order to understand and seek solutions for decision makers in sustainable water resource management.