In peri-urban areas competition among domestic, municipal, industrial and agriculture water use is strong and calls for identification of alternatives to bridge the widening gap between required and available water resources. In this study, the RIver BAsin SIMulation (RIBASIM) model is applied to explore the potentials of five demand and two supply water management options to improve water allocation in a peri-urban region in order to meet both rural and urban water needs. The Citarum river basin and the adjoining urbanized Jabotabek region in Indonesia are used as a case study. The analysis indicates that the considered demand management options are able to satisfy future urban water demand of the Jabotabek region taken into account agricultural water requirements. All analyzed options share the requirement for an accurate monitoring of the regional water balance and improved information management, while some require additional modification of land use (management). The paper discusses briefly the costs and other implications associated with implementation of the various management options. The presented analysis contributes to the transparency of the debate on local water scarcity problems and provides decision-makers with quantitative information on water allocation problems in densely populated regions with competing sectors
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