Optimization of Water Resources Management for Widening the Green Area
Achmad Hariyadi, M. Bisri, Pitojo Tri Juwono, Runi Asmaranto, Lily M. Limantara
Abstract
This study aims to develop an integrated optimization model for water resources management in the Jatigede Reservoir by incorporating the influence of land cover dynamics on hydrological processes. The objectives are to improve the reliability of water allocation for irrigation, raw water supply, and hydropower while simultaneously enhancing ecological sustainability through land use planning. The methodology combines hydrological analysis using rainfall–runoff and dependable flow estimation, spatial assessment of land cover change based on the satellite imagery, and optimization modeling with multi-objective programming. Simulation scenarios were constructed to represent the existing conditions, spatial planning policies (RTRW), and optimized land cover management. The findings reveal that incorporating land cover factors into the optimization model increases water supply reliability by 5–10% and reduces the risk of sedimentation, thereby extending the effective lifetime of the reservoir. Moreover, the optimization scenario demonstrates that expansion of dry land forest cover contributes positively to water regulation, although it requires trade-offs with plantation forest areas. The novelty of this research lies in bridging the gap between technical water allocation models and spatial ecological considerations, offering a more comprehensive decision-support tool. This improvement provides valuable insights for policymakers in integrating reservoir operation strategies with land use planning to achieve sustainable water resources management.