{
  "problem": "Stationary hydraulic jump on a horizontal frictionless bed; supercritical inflow h1 = 0.2 m at Fr1 = 2.5, downstream depth held at the Bélanger sequent depth.",
  "domain": {
    "xmin": 0.0,
    "xmax": 100.0
  },
  "channel": {
    "width_m": 1.0,
    "shape": "rectangular"
  },
  "friction": "none",
  "bed": "horizontal",
  "boundaries": {
    "upstream": {
      "type": "supercritical_inflow",
      "h_m": 0.2,
      "Fr": 2.5
    },
    "downstream": {
      "type": "depth",
      "from_reference": "h2"
    }
  },
  "scoring_note": "The jump position is neutral on a frictionless horizontal bed; scoring compares plateau depths upstream (x < 30 m) and downstream (x > 70 m) and the unit discharge."
}