Hydra urban drainage
Hydra 17 (NEER AI, Rust): its urban-drainage engine on the SWMM data model, run through its CLI with default settings.
Production software, installed from its official source and run by the suite with its defaults, except the settings each card names. Rank #2 on the leaderboard, OpenHydro rating 1015 (95 % interval 889 to 1150) over 13 tests; median difference 3.8 %. Score cards from: Hydra 17.0.0 urban drainage, Hydra urban drainage (17.0.0/4.1.1).
| Test | Difference, rank | Checks |
|---|---|---|
| Sewer pipes running part full A1D-001 | #1 under 0.01 % off of 5 models | • Worst depth error 0.00051 mm off; • Typical flow error < 0.0001 % off Exact to rounding (0.0005 mm): Hydra computes the circular section exactly, where the SWMM engines interpolate a 51-entry table (0.27 mm off). |
| Sewer pipes running full A1D-002 | #1 under 0.01 % off of 5 models | • Worst depth error 0.00011 mm off; • Typical flow error < 0.0001 % off |
| Tank emptying through an outlet A1D-003 | #1 0.25 % off of 5 models | • Worst depth error 1.1 mm off; • Worst flow error < 0.0001 m³/s off |
| Pump working on its curve A1D-004 | #1= under 0.01 % off of 5 models | • Worst depth error < 0.0001 mm off; • Worst flow error < 0.0001 m³/s off |
| Backwater up a sewer A1D-005 | #1= 0.024 % off of 5 models | • Worst depth error 0.29 mm off; • Typical flow error < 0.0001 % off |
| Gentle backwater in a channel A1F-001 | #9= 0.022 % off of 15 models | • Average depth error 0.2 mm off; · Water conserved 0.00049 % error |
| Dam break onto dry ground A1F-010 | #14= 27 % off of 20 models | • Flood front 102 m behind exact; · Water conserved 0.01 % error |
| Dam break into shallow water A1F-011 | #16 3.8 % off of 20 models | • Average depth error 2.1 cm off; · Water conserved 0.014 % error |
| Standing hydraulic jump A1F-020 | #6 71 % off of 9 models | • Depth profile 71 % off; · Jump stays put 13 % error |
| Calm flow over a hump A1F-040 | #11 199 % off of 12 models | • Average depth error 1.5 m off; • Average flow error 8.79 m²/s off |
| Flow speeding up over a hump A1F-041 | #9= 167 % off of 12 models | • Average depth error 49 cm off; • Average flow error 2.55 m²/s off |
| Hump with a hydraulic jump A1F-042 | #10 220 % off of 12 models | • Average depth error 24 cm off; • Average flow error 0.397 m²/s off |
| Still lake around an island A1F-043 | #12 12 % off of 13 models | • Worst velocity error 0.117 m/s off; • Average depth error 0.4 mm off |
| Real sewer network, Odense A1F-100 | #1= 34 % off of 3 models | · Fit to measurements NSE -0.528; • Peak level 33 cm off |
| Sewer network routing B-EXTRAN-001 | #3 4.5 % off of 4 models | • Peak depths 1.3 % off; • Volumes 4.5 % off |
| Pump station switched by rules B-RTC-001 | #3 90 % off of 4 models | • Peak depths 90 % off; • Volumes 66 % off; · Timing 101,460 s off |