{
  "revision": "R11/E.15",
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      "id": "south-1-1",
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      "id": "west-3",
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    {
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  ],
  "limits": [
    "Terraces are a fill-only visual alternative; soil retention, roots, foundations and groundwater not designed.",
    "Pipe diameters and flat gutter geometry are coordination reserves; falls, storm intensity and emergency overflow require hydraulic design.",
    "Retention infiltration is conditional on soil testing; no confirmed public outfall."
  ],
  "source_ifc_sha256": "4fb989a1e4ea21490ad9b6e525cd9d402f7ee2b089e57da1ed14e93682e75e6d",
  "storm_sensitivity": {
    "catchment_plan_m2": 292.7,
    "runoff_coefficient": 1.0,
    "intensities_are_assumed_not_local_IDF": true,
    "cases": [
      {
        "intensity_mm_h": 50,
        "flow_L_s": 4.06,
        "volume_30min_m3": 7.32
      },
      {
        "intensity_mm_h": 100,
        "flow_L_s": 8.13,
        "volume_30min_m3": 14.63
      },
      {
        "intensity_mm_h": 150,
        "flow_L_s": 12.19,
        "volume_30min_m3": 21.95
      }
    ],
    "note": "No green roof retention credit. Empty storage only; irrigation cistern may already be full. No claim of design-storm capacity."
  },
  "buried_drain_checks": {
    "samples": 2079,
    "minimum_soil_cover_m": 0.36,
    "required_concept_cover_m": 0.2
  }
}