Use a lookup for deriving capacity parameters

[gassc]

culvert-toolkit/src/drainit/services/naacc.py

Line 210 in 602b096

def _derive_capacity_parameters(self, row):

Replace the nested if/elif/else business logic here with a multi-column lookup table that can be loaded from a human-readable, human-editable external config file (e.g., a csv).