Coupled hydrologic and biogeochemical responses of nitrate export in a tile-drained agricultural watershed revealed by SAS functions and nitrate isotopes

This repository contains the input data for SAS and nitrate transport modeling and the model results that can be used to reproduce the water age and nitrate reactive transport results presented in Sha et al. Coupled hydrologic and biogeochemical responses of nitrate export in a tile-drained agricultural watershed revealed by SAS functions and nitrate isotopes. File 1: Hydrometric_data.xlsx Input hydrometric data from 1994 to 2023 water years for SAS-based water age modeling. File 2: Concentration_data.xlsx Input chloride concentration data from 1994 to 2023 water years for SAS-based water age modeling. Nitrate concentration data are also included. File 3: Isotope_data.xlsx Nitrate isotope data measured during 2021-2023 water years. File 4: SAS_model_behavioral_parameter_sets.xlsx The behavioral parameter sets obtained from the calibration of the SAS model. File 5: Nitrate_transport_model_behavioral_parameter_sets_DynamicModel.xlsx The behavioral parameter sets obtained from the calibration of the dynamic nitrate transport model. File 6: Nitrate_transport_model_behavioral_parameter_sets_StaticModel.xlsx The behavioral parameter sets obtained from the calibration of the static nitrate transport model.