Simulations of Groundwater Nitrogen Transport in the Long Island Sound Watershed, New York under Potential Nitrogen Management Scenarios

This data release contains input and output files for fifteen (15) MODFLOW 6 models that simulate future groundwater nitrogen transport under potential nitrogen management decisions. The development approach for the flow and transport models is described in Jahn and Walter (2026). Each scenario adjusts nitrogen inputs (Monti and others, 2024) based on communication with local stakeholders. Each scenario is simulated using the inset steady-state groundwater flow model and inset nitrogen transport model documented in a separate model application data release (Jahn, 2025).