The Integrated Monitoring System (SIM) to support the Italian implementation of the Soil Monitoring and Resilience Directive 

The Soil Monitoring and Resilience Directive will require Member States to implement harmonised frameworks for the storage, integration, and dissemination of soil monitoring data, to assess the prescribed set of indicators, and to support evidence-based policies for sustainable land management. In Italy, these requirements are being addressed through the development of a comprehensive digital infrastructure within the Integrated Monitoring System (SIM), a strategic initiative funded under the National Recovery and Resilience Plan.The core component of this infrastructure is the National Soil Health Database (BNSS), conceived as a national hub for interoperable soil data management. The BNSS relies on an INSPIRE-compliant data model that has been further extended to formally represent sampling designs, sample handling procedures (transport and storage), and quantitative estimates of measurement uncertainty. This enhanced semantic framework enables the robust harmonisation of newly generated chemical, physical and biological soil data with heterogeneous legacy datasets, thereby improving data comparability, reusability and overall fitness for purpose across scientific and policy domains. The BNSS is supported by a suite of services for standardised data ingestion, metadata-driven catalogue discovery, advanced querying, and controlled data access, ensuring traceability of data ownership and provenance. All datasets, including historical records, can be systematically evaluated against configurable threshold values and synthesised at the scale of soil units, as stated in the Directive. At present, alternative soil unit delineations are produced through the spatial integration of soil districts, pedological maps, and land use and land cover layers, allowing for flexible scenario analysis. Spatial modelling workflows based on statistical and data-driven approaches are implemented through predefined analytical pipelines, enabling the generation of harmonised spatial products and their integration with downstream modelling tools, including applications for the assessment of soil water erosion. Overall, the SIM ecosystem establishes a coordinated, interoperable, and scalable digital environment that supports the network of competent national and local authorities designated under the Directive in the design, implementation, and evaluation of the foreseen long-term soil monitoring, fostering stronger links between soil science and policy.