<![CDATA[Rapid urbanization in emerging economies frequently outpaces environmental planning, creating severe ecological deficits. In Indonesia, Law Number 26 of 2007 mandates that local governments maintain at least 30% of their urban area as green open space (RTH). However, compliance remains critically low in secondary cities. This study employs a Sequential Explanatory Mixed-Methods design to evaluate the implementation gap in Banyumas Regency, Indonesia. Utilizing longitudinal policy data from 2019 to 2023, a stratified random survey of 300 residents, Geographic Information System (GIS) analysis, and Structural Equation Modeling (SEM), this research quantifies the divergence between statutory targets and spatial reality. Results indicate a critical implementation gap, with Public RTH covering only 2.23% of the urban area, far below the 20% public target. While the total RTH area increased by 11.05% over five years, the growth rate is insufficient. Spatial analysis reveals a Gini coefficient of 0.65, highlighting severe inequality where green space is concentrated in administrative cores while peri-urban districts remain green deserts. Structural Equation Modeling confirms that Political Will (beta = 0.62) significantly influences implementation success, while Resource Constraints (beta = -0.48) act as a critical inhibitor. Qualitative analysis identifies a resource trap, where decentralized governance incentivizes revenue-generating infrastructure over environmental assets. The study concludes that achieving the 30% target requires a paradigm shift from state-centric planning to collaborative governance and the establishment of a municipal Land Banking Agency.]]>
