125 lines
3.2 KiB
JSON
125 lines
3.2 KiB
JSON
{
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"schema": "irrigation-controller-v1",
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"version": "1.0.0",
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"author": "arthur-ibay",
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"date": "2026-07-17",
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"location": "Salt Lake City, UT",
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"theory": {
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"primary_equation": "V_required = (ET₀ × Kc × A_root) − SM_deficit",
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"runtime_equation": "T_pump = V_required ÷ Q_pump × 60",
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"units": {
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"ET₀": "mm/day",
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"Kc": "dimensionless",
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"A_root": "m²",
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"SM_deficit": "liters",
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"Q_pump": "L/min",
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"T_pump": "minutes/day"
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},
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"sources": [
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{
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"id": "Q5187947",
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"slug": "crop-coefficient",
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"description": "property of plants used in predicting evapotranspiration",
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"url": "https://4ort.xyz/entity/crop-coefficient"
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},
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{
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"id": "FAO-56",
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"title": "Crop Evapotranspiration: Guidelines for Computing Crop Requirements",
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"authors": "Allen, Pereira, Raes, Smith",
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"year": 1998,
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"publisher": "FAO Irrigation and Drainage Paper No. 56"
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}
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]
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},
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"crop_coefficients": {
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"leafy_greens": {
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"lettuce_early": {
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"Kc": 0.95,
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"stage": "initial canopy",
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"days_after_transplant": "0-14"
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},
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"lettuce_midcanopy": {
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"Kc": 1.15,
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"stage": "peak photosynthetic",
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"days_after_transplant": "15-35",
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"peak_demand_mm_per_day": 4.2
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},
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"spinach": {
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"Kc": 1.05,
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"stage": "mature",
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"notes": "shade-intolerant, requires frequent misting"
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},
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"arugula": {
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"Kc": 0.90,
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"stage": "harvest-ready",
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"notes": "low water demand, drought-resistant"
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}
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},
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"fruiting": {
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"tomato_established": {
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"Kc": 1.10,
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"stage": "flowering onset",
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"days_after_transplant": "40-60"
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},
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"tomato_fruiting": {
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"Kc": 1.15,
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"stage": "fruit fill",
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"days_after_transplant": "61-90",
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"peak_demand_mm_per_day": 6.8
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},
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"pepper": {
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"Kc": 1.05,
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"stage": "fruit development",
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"peak_demand_mm_per_day": 5.4
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},
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"cucumber": {
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"Kc": 1.20,
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"stage": "vine maturity",
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"notes": "highest water demand of common solanaceous crops"
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}
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},
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"grains": {
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"wheat_initial": {
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"Kc": 0.40,
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"stage": "emergence to tillering"
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},
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"wheat_midseason": {
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"Kc": 1.05,
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"stage": "booting to heading",
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"peak_demand_mm_per_day": 4.8
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},
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"corn_early": {
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"Kc": 0.50,
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"stage": "seedling"
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},
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"corn_peak": {
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"Kc": 1.15,
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"stage": "silking",
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"peak_demand_mm_per_day": 7.2
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}
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}
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},
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"operational_limits": {
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"optimal_duty_cycle_minutes_per_day": 30,
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"warning_threshold_minutes_per_day": 90,
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"critical_failure_minutes_per_day": 120,
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"recommended_pulse_frequency": 4,
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"pulse_interval_hours": 6
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},
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"field_notes_wasatch": {
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"trial_date": "2026-07-10",
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"location": "Great Basin foothills, elevation 1,400m",
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"crop": "lettuce",
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"observed_ET0_july": 5.2,
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"actual_Kc_measured": 1.15,
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"pump_spec": "12 L/min diaphragm",
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"area_serviced": "50 m²",
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"computed_runtime": "11.0 minutes/day",
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"validation": "confirmed via soil probe gravimetric sampling"
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}
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}
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