3. Input files

vflood-rri reads the exact same RRI_Input.txt format the original Fortran RRI uses (format version RRI_Input_Format_Ver1_4_2) — every path, grid file, and parameter in that file means exactly what it means in the original model. If you already have a working RRI project, point vflood-rri at its RRI_Input.txt directly; nothing needs to be converted.

If you're building a project from scratch, the fastest path is to copy an existing RRI_Input.txt (e.g. from rokan15s_) and edit it — the file format itself isn't documented here since it's identical to upstream RRI's, but the architecture writeup from this project's earlier reverse-engineering session covers every field if you need a refresher on what each line means.