- Problem
- Farmers irrigate by habit or by water-turn schedule, not by what the soil and the crop need.
- How it works
- Soil-moisture probes and flow meters, local weather and satellite evapotranspiration (FAO WaPOR at 100 m; 20 m over Jendouba and Kairouan) feed a model that tells each farm when and how much to irrigate — by WhatsApp, or by opening the valve directly.
- Evidence
- Sensor-based systems saved 20–41.5% of water versus traditional irrigation in published trials; drip delivers about 90% of the water to the crop against about 60% for surface irrigation. Caveat: savings only stay in the aquifer if allocations are capped — otherwise farmers expand the irrigated area.38101145
- Where in Tunisia
- Irrigated olive groves (Sfax, Kairouan), date oases (Kébili, Tozeur), vegetable perimeters (Cap Bon, Sidi Bouzid).
- What we would build
- Farm dashboard and WhatsApp advisor, LoRaWAN sensor kit, irrigation model calibrated per crop.
- Success metric
- m³ per tonne harvested; pumping kWh per hectare