A town cut into metered districts. One LoRa sensor per district watches the night flow. When a district leaks, pressure narrows it to a segment and two acoustic loggers pin it to the metre. Repair crews go to the leak, not the complaint.
| District | MNF m³/h | Baseline | Δ | |
|---|---|---|---|---|
| DMA-01 | — | 22 | — | … |
| DMA-02 | — | 31 | — | … |
| DMA-03 | — | 14 | — | … |
| DMA-04 | — | 28 | — | … |
| DMA-05 | — | 19 | — | … |
| DMA-06 | — | 40 | — | … |
Six districts, one leak somewhere. The system finds it, narrows it, pins it, and sends the crew — before a single call.
Electromagnetic flow meter with pulse output + pressure transducer on an ESP32/LoRa node, IP68, in the existing valve chamber. Sends every 15 min, every minute during the night test. Battery ≥ 5 years.
Three pressure points per district turn a district-wide alarm into one segment. Two acoustic loggers on that segment listen at 02:00; the delay between them gives the distance along the pipe.
Gateways on water towers and reservoirs — ADE already owns the high points. The thesis measures path loss from underground chambers, picks spreading factors, and models coverage for a whole wilaya.
| Thesis prototype — 1 district3 flow/pressure nodes, 2 acoustic loggers, 1 gateway, Raspberry Pi, EPANET model of the town | €700 |
| One town — Saïda, 6 districts38 nodes, 3 gateways, 6 acoustic loggers, server, 1 year of 4G backhaul | €21,000 |
| Whole wilaya — 16 communes~120 districts, ~18 gateways on ADE reservoirs, ops screen at the ADE unit | €80,000 |
| vs. water lost in Saïda today at 35 %≈ 4.5 million m³ / year · water from the Chott Chergui aquifer and dams costs ADE ~€0.3/m³ to pump and treat | ≈ €1.3 M / year |
Algeria loses roughly a third of its drinking water in the pipes: the ministry reported 35 % nationally in 2019, with some wilayas near 60 %, and the national target is 18–20 % by 2030. SEAAL fixed 24,000 leaks by hand in 2024 and recovered only 8 days of consumption.
1 town system ≈ 1 % of its annual lossPayback in weeks. Every leak found at 02:00 is a leak nobody had to report.