> For the complete documentation index, see [llms.txt](https://world-wildlife-fund.gitbook.io/free-flowing-rivers/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://world-wildlife-fund.gitbook.io/free-flowing-rivers/annex/benchmark-river-fields.md).

# Benchmark River fields

<table><thead><tr><th width="152">Field</th><th width="191">Alias</th><th>Description</th></tr></thead><tbody><tr><td>GOID</td><td>Global object identifier</td><td>Corresponds to the GOID of the river. For the model to recognize which river is the benchmark river, each benchmark river must have the correct GOID (i.e., the GOID that corresponds to the GOID of the river reach).</td></tr><tr><td>BB_ID</td><td>Backbone River identifier</td><td>An integer identifying the river. Corresponds to the BB_ID of the river in the streams feature class.</td></tr><tr><td>FFRID</td><td>Free-flowing river identifier</td><td>An integer identifying the benchmark river. Each benchmark river must have a unique FFRID value.</td></tr><tr><td>Name_Expert</td><td>Name of the river.</td><td>The name of the benchmark river. The name must be consistent across the same FFRID.</td></tr><tr><td>BENCH_SRC</td><td>Source of the benchmark river</td><td>The source used to designate the river as a benchmark river. This can be the name of a researcher or a publication, a category such as "Expert" or "Publication" etc. The field is used to analyze the results of the benchmarking separately by source name or category.</td></tr></tbody></table>