[8pt] Benchmark flow file is incomplete

[CarsonPruitt-NOAA]

The flow file for BLE HUC 11140103 is missing the feature_id 707084. The area of this error has diverging flowpaths, which could be contributing to the issue. We should take another look at the algorithm used to make the flow files to make sure that this doesn't happen elsewhere.

[mluck]

The algorithm currently fills in flow files for segments only where the flow can be exactly computed, i.e.:

• the upstream flow is the sum of the flows in all segments immediately upstream
• the downstream flow is the flow in the segment immediately downstream
• if both the upstream and downstream flows exist, the assigned flow is the mean of the upstream and downstream flow
• no flow is assigned in other cases such as in this issue where the flow diverges