The tool is created to calculate the stage-discharge relationship, i.e. the rating curve, of an uneven/custom weir. The tool was developed using Visual Studio 2008, and the crystal report was used to generate a report. To view and print the analysis report, the crystal report runtime is required. The crystal report installer, CRRedist2008_x64.msi (for 64-bit operation system) and CRRedist2008_x86.msi (for 32-bit operation system), are both available for download.