This resource contains MATLAB scripts and input data needed to replicate results presented in "M. S. Riasi, A. Teklitz, W. Shuster, C. Nietch, L. Yeghiazarian, Reliability-Based Water Quality Assessment with Load Resistance Factor Design: Application to TMDL, Journal of Hydrologic Engineering, 2018."

This resource contains two separate packages:

1. LRFD_ShepherdsCreek.zip: This zipped folder contains MATLAB scripts and input data needed to replicate results presented in section 3.1 of the above-mentioned article. The contamination data for DIN and TP in 6 stations in Shepherds Creek watershed is stored in “Contamination Data” subfolder. The USGS flow data for these stations in stored in “Flow Data” subfolder.
To run the code, user need to run “MAIN_LRFD.m” script. Immediately after running the script, user will be prompted to choose the target station and target contaminant. User will also need to answer two questions: i) Would you like to keep all storm events?” ii) would you like to keep zero flow data?. To replicate our results, default answers must be selected (Yes and No respectively).
Once the run is complete, the results for “FORM reliability analysis”, “LRFD design for 25% probability of failure” and “post-design FORM reliability analysis” will be printed in the command window.

2. LRFD_UEFW_ExcelSheet.zip: This zipped folder contains MATLAB scripts and input data needed to replicate results presented in section 3.2 of the above-mentioned article.
To run the code, user need to run “MAIN_LRFD.m” script. Immediately after running the script, user will be prompted to select the input Excel sheet. The input Excel sheets for the 3 cases studied in this article can be found in “InputExcelLRFD” subfolder.
Once the run is complete, the results for “FORM reliability analysis” and “LRFD design for 25% probability of failure” will be printed in the command window.
Users can create their own cases by duplicating the Excel files and changing the numbers highlighted with blue font.