Linking water age, nitrate export regime, and nitrate isotope biogeochemistry in a tile-drained agricultural field [Dataset]

This repository contains the SAS model input data and the model results that can be used to reproduce the water age results for the three study tiles presented in Yu et al. Linking water age, nitrate export regime, and nitrate isotope biogeochemistry in a tile-drained agricultural field File 1: SAS_model_input_TileX.csv The input data for the SAS model calibration for the three tiles. File 2: behavioral_parameter_sets_Model#1_TileX.csv The behavioral parameter sets obtained from the calibration of SAS model 1 (i.e., time-invariant kQ). File 3: behavioral_parameter_sets_Model#2_TileX.csv The behavioral parameter sets obtained from the calibration of SAS model 2 (i.e., time-variant kQ). File 4: Cl_simulation_results_Model#1_TileX.csv Simulated chloride concentration based on the optimal parameter set of SAS model 1 (i.e., time-invariant kQ). File 5: Cl_simulation_results_Model#2_TileX.csv Simulated chloride concentration based on the optimal parameter set of SAS model 2 (i.e., time-variant kQ). File 6: median_water_age_Model#1_TileX.csv Median water age of tile discharge based on the optimal parameter set of SAS model 1 (i.e., time-invariant kQ). File 7: median_water_age_Model#2_TileX.csv Median water age of tile discharge based on the optimal parameter set of SAS model 2 (i.e., time-variant kQ). File 8: File_column_names.txt A text file that explains the column names for each fil