Gedarchay_LULC_Supplamentary data

This dataset contains the SWAT project files, final calibrated parameter sets, and scenario simulation outputs supporting the study “Policy-Implementation Gap in the Urmia Lake Restoration Program: Hydrological Responses to Simulated versus Observed Orchard Expansion” by Somayeh Nader, Bagher Shirmohammadi, Negar Salehi, Ghasem Farahmand, and Martijn Booij (2026, Earth Systems and Environment, DOI: 10.5281/zenodo.24058770). The SWAT model was set up for Gedarchay River Basin, calibrated and validated against observed streamflow data, and used to simulate land use scenarios (Observed 2022 (S2) and Integrated Policy Scenario (S3)). The final fitted parameter set included here is the one used for validation and all scenario simulations reported in the manuscript. Files are organized into model inputs/project files, calibration parameters, and scenario outputs. The dataset is intended to support reproducibility of the reported results and reuse of the calibrated model. Corresponding author: Bagher Shirmohammadi; Email: [email protected].