Since we have unit tests built into the code package and CI/CD pipelines, this ticket focuses on validation testing (ensuring that the algorithms and outputs work under various use cases). Focus on:

o Percentile computations - define test dataset; what is our basis for comparison (WW, waterservices stats service?); what are the acceptance criteria? o HUC-based runoff computations - define test dataset; what is our basis for comparison (WW?); what are the acceptance criteria?

We want to ensure tests are well documented and easy for stakeholders to review and understand.