SNIPE (Subsurface NItrogen Pollution Evaluation) is a physically-based, grid-based modeling framework developed to evaluate nitrate leaching from soil across various land-use types at a national scale. The model provides a scientific foundation for establishing effective groundwater management policies and mitigating groundwater contamination caused by nitrogen loading.

• Project for the Improvement of Groundwater Quality Management Regarding Nitrate Nitrogen in Agricultural and Livestock Areas / National Institute of Environmental Research (2014 – 2017)

• Spatial Discretization: Partitioning of the target area into a regular square grid system for localized mass balance calculations.

• Eco-hydrological Processes: Employs the same rigorous soil-water and pollutant behavior simulation engines as the STREAM model.

• Macro-scale Optimization: To ensure computational efficiency at the national scale, the river routing and in-stream processes are omitted, focusing exclusively on soil-to-subsurface transport.

• Temporal Resolution: Operates at a daily time-step (1-day interval) to capture seasonal variations in nitrate leaching.