{
 "surface": {
  "x0": 0.0,
  "x1": 30.0,
  "y0": 0.0,
  "y1": 30.0,
  "cell_size": 1.0,
  "manning_n": 0.02,
  "bed": {
   "type": "flat",
   "z": 0.0
  },
  "initial_level": 0.3,
  "boundaries": {
   "left": "wall",
   "right": "wall",
   "top": "wall",
   "bottom": "wall"
  }
 },
 "manholes": [
  {
   "id": "M1",
   "x": 15.0,
   "y": 15.0,
   "crest": 0.05,
   "perimeter": 1.884956,
   "area": 0.282743,
   "cw": 0.5,
   "co": 0.6
  }
 ],
 "network": {
  "junctions": [
   {
    "id": "M1",
    "invert": -2.0,
    "max_depth": 2.05
   }
  ],
  "outfalls": [
   {
    "id": "O1",
    "invert": -3.0,
    "type": "FREE"
   }
  ],
  "conduits": [
   {
    "id": "P1",
    "from": "M1",
    "to": "O1",
    "length": 100.0,
    "D": 0.3,
    "n": 0.013
   }
  ],
  "duration_s": 7200,
  "report_step_s": 60
 },
 "duration_s": 7200,
 "output_interval_s": 60
}