{
  "runtime": {
    "python": "3.12.10 (tags/v3.12.10:0cc8128, Apr  8 2025, 12:21:36) [MSC v.1943 64 bit (AMD64)]",
    "numpy": "2.5.3",
    "matplotlib": "3.11.2"
  },
  "generator_sha256": "4705cdee21c57c9516fe7dc42b3a870d5ecc82bc1ef470a5d031ca2099078560",
  "wall": {
    "equation": "Q=K*A*deltaH/L",
    "area_m2": 0.1,
    "thickness_m": 0.005,
    "K_m_s": [
      1e-09,
      1e-08,
      1e-07
    ],
    "head_range_m": [
      -2,
      2
    ],
    "limitations": [
      "steady",
      "saturated homogeneous flat wall",
      "prescribed heads",
      "no pipe curvature",
      "no soil feedback",
      "no unsaturated flow",
      "no network losses"
    ]
  },
  "bucket": {
    "initial_mm": 20,
    "hard_capacity_mm": 40,
    "demand_mm_day": 5,
    "days": 30,
    "order": "Add infiltrated irrigation; drain above cap; withdraw up to demand",
    "other_fluxes": "rain capillary rise runoff lateral exchange all zero",
    "limitations": [
      "accounting rule, not field capacity",
      "no crop response",
      "no ET physics",
      "not coupled to wall model"
    ]
  },
  "published_field_study": {
    "citation": "Siyal & Skaggs (2009), Agricultural Water Management 96, 893-904, doi:10.1016/j.agwat.2008.11.013",
    "source_url": "https://www.ars.usda.gov/arsuserfiles/20360500/pdf_pubs/P2266.pdf",
    "source_locator": "USDA-hosted PDF p. 8; printed p. 900; Table 1; ME definition Eq. 5 on PDF p. 8",
    "conditions": "one loam field site; four pipe pressure-head treatments; after five days",
    "mean_error_definition": "mean(simulated minus observed); negative indicates underprediction",
    "metrics": [
      {
        "pressure_head_cm": 25,
        "mean_error_cm3_cm3": -0.001,
        "rmse_cm3_cm3": 0.011,
        "reported_r_squared": 0.974
      },
      {
        "pressure_head_cm": 50,
        "mean_error_cm3_cm3": -0.004,
        "rmse_cm3_cm3": 0.013,
        "reported_r_squared": 0.97
      },
      {
        "pressure_head_cm": 100,
        "mean_error_cm3_cm3": -0.004,
        "rmse_cm3_cm3": 0.012,
        "reported_r_squared": 0.984
      },
      {
        "pressure_head_cm": 200,
        "mean_error_cm3_cm3": -0.006,
        "rmse_cm3_cm3": 0.014,
        "reported_r_squared": 0.983
      }
    ],
    "csv_sha256": "95a274404540f8332b1be750b5aef9d2e5b26e439cbab5dc368f3b5c2d9e009e",
    "figure_generator": "published-error-study.svg/.png/.pdf generated in this script",
    "interpretation_limits": [
      "transcribed reported statistics, not raw observations",
      "not water saving",
      "not crop yield",
      "not universal performance"
    ]
  },
  "independent_models": true
}