Water security of river basins in West Java

Abstract

West Jawa is a very important province in Indonesia. There are six river basins in West Jawa, namely: Ciliwung-Cisadane, Citarum, Cimanuk-Cisanggarung, Cisadea-Cibareno, Ciwulan-Cilaki, and Citanduy. The capital city of Jakarta is in the Ciliwung-Cisadane River basin, but the public water supply is supplied mostly from the Citarum River basin, which has three hydropower reservoirs and irrigates 240,000 hectares of rice field. Water security in West Jawa plays an important part in the sustainable development of the nation. This paper formulates and computes the water security for river basins in West Jawa. The method of constructing water security dimension is adapted from the Asian Water Development Outlook, having five dimensions of 1) household water security; 2) economic water security; 3) urban water security; 4) environmental water security; and 5) resilience to water-related disasters. At the river basin level, the water security indices are designed to be effective, simple, widely available, having no ambiguity, and directly related to the progress of infrastructure development. The water security results are presented as a radar diagram, and spatially in the thematic map. It is concluded that the overall water security score in West Java is "capable" (score of 3). The weakest security is Ciliwung-Cisadane and Citarum as "engaged" (score of 2). Both river basins are suffering from "hazardous" environmental water security.