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🇵🇭 Manila

EFCOS: Metro Manila's Flood Telemetry and Floodway Gates

The MMDA's Effective Flood Control Operation System, built with Japanese aid in 1993 and rehabilitated by JICA in 2014-2016, telemeters rainfall and river levels across the Pasig-Marikina basin from a control room at Rosario Pumping Station. Readings publish live on PAGASA's basin site with alert, alarm and critical thresholds. Crews decide how many Manggahan Floodway gates to open, keyed to the Sto. Niño gauge upstream. The defences those gauges warn about are another matter: a 2025 government validation flagged 421 flood-control projects nationwide as ghosts, and in May 2026 the Ombudsman charged a senator, a former public works secretary and two Metro Manila district engineers with plunder.

Live 📅 since 1993 ✔ Editor-reviewed

✔ Reviewed by the 1001 Smart Cities editorial desk · 🔎 Last verified

🌱 EnvironmentWaterSensors & IoTSafety & security

📊 Impact

The MMDA says mountain rain gauges give roughly 90 minutes of warning before water levels rise in the Marikina and Pasig rivers. An operator statement, not independently measured.

🎓 Lesson

Sensing and concrete are procured, funded and audited separately. Metro Manila measures its floods in public, minute by minute, while the works those measurements warn about became the country's largest corruption case.

Evidence🏛️ Official
Scale🗺️ Regional
FundingJapanese development aid for the telemetry and its 2014-2016 restoration; MMDA operating budget

Sources

↗ PAGASA — Pasig-Marikina-Tullahan flood forecasting and warning system (water level)Primary and live: publishes real-time river levels for the Marikina, Pasig and Tullahan with alert, alarm and critical elevation columns and a legend distinguishing PAGASA stations from MMDA stations. Rendered with a 26 July 2026 timestamp, confirming the system is running.
↗ Official Gazette — MMDA flood reduction measures in Metro ManilaGovernment briefing establishing that EFCOS is designed for operating the Manggahan Floodway and the Napindan Hydraulic Control Structure, fed by telemetered observation stations with units at the public works central office, PAGASA, Napindan and Rosario, plus warning posts along the floodway. Direct fetch returns 403; existence and wording confirmed via search.
↗ Inquirer — Metro gets a tweaked early flood warning system (2016)Supports the JICA-funded 2014-2016 rehabilitation, the March 2016 turnover to the MMDA, the control base at Rosario Pumping Station in Pasig, and the roughly 90-minute lead-time claim, quoted from the MMDA chairman.
↗ De La Salle University — thesis on the Manggahan and Napindan control structuresAcademic source for the operating practice: the MMDA bases gate control of the Manggahan and Napindan structures on the Sto. Niño water-level gauge upstream of the Rosario weir, supporting the claim that gate operation is a crewed decision on gauge thresholds rather than automatic actuation.
↗ SunStar — timeline of the flood control scandalDated chronology: the president ordered an audit of three years of flood-control projects in his 28 July 2025 address; on 11 August 2025 he named 15 contractors holding over 100 billion pesos in contracts since 2022; an Independent Commission for Infrastructure was created by executive order on 11 September 2025; Senate hearings opened 19 August 2025.
↗ Rappler — at least 421 ghost flood control projects uncovered nationwide (9 Oct 2025)Source for the 421 figure: validation of about 8,000 public works projects, carried out with the defence department, armed forces, police and the planning agency, flagged at least 421 as non-existent, with roughly 100,000 projects still to be validated.
↗ GMA News — 14 of 421 ghost flood control projects confirmed non-existent (19 Jan 2026)Counterweight and precision check: the acting justice secretary told a Senate hearing that only 14 of the 421 were confirmed non-existent, adding that the department was not yet convinced the others were ghost projects. This justifies the word flagged rather than confirmed in the snippet.
↗ GMA News — Ombudsman files plunder and graft cases over flood control projects (28 May 2026)The Metro Manila link that carries the scope: charges cover roughly 573 million pesos in alleged kickbacks from fiscal 2025 public works projects in the National Capital Region, naming a senator, a former public works secretary, two National Capital Region district engineers and an assistant district engineer. Charges only; no conviction.
↗ Manila Bulletin — anti-graft court orders arrests in the plunder case (1 Jun 2026)State of proceedings as of mid-2026: the anti-graft court found probable cause and ordered arrests on 1 June 2026, with no bail recommended on the plunder count. Trial pending.
📎 Cite this project

1001 Smart Cities (2026). “EFCOS: Metro Manila's Flood Telemetry and Floodway Gates” — Manila, Philippines. The Smart City Atlas. https://1001smartcities.org/projects/manila-flood-monitoring/ (last verified 2026-07-26). Data: CC BY 4.0.

The underlying data is free to reuse with attribution — see the open data page.

🔗 Related projects

🇹🇭 Bangkok Flood Control Centre: Drainage Telemetry & Street-Level Forecasting · Bangkok The same crewed reflex: Bangkok forecasts flood depth and still starts its pumps by hand; Manila's crews open floodway gates on a gauge. 🇯🇵 Tsunami-Alert Automatic Tide Gate Closure · Osaka Osaka's gates shut themselves on a national alert; Manila's crews decide how many Manggahan gates to open against an upstream gauge. 🇰🇷 Busan Urban Flood Warning System (Busan Safety ON) · Busan Busan's portal warns and stops there; Manila's telemetry publishes the same live thresholds, then crews act on them at the floodway. 🇵🇭 Pasig River: Court-Ordered Water Quality Monitoring · Manila Two systems on one river: EFCOS gauges how high the Pasig rises, the court-ordered stations what is dissolved in it.

🧭 Explore the atlas

🏙️ Manila Explore every verified project and the city's smart-city story. 🌱 Environment Browse the main topic behind this project. 📖 Adaptive traffic signals Traffic lights that retime themselves in real time from live sensor data to match actual traffic, instead of running a fixed pre-set schedule. 📖 ANPR (automatic number-plate recognition) Camera technology that reads vehicle number plates automatically, used to enforce road-pricing and clean-air zones without toll booths. 📖 Digital twin A living virtual copy of a real asset or city, kept in sync by live sensor data so planners can test changes on the model before the real thing. 🪦 Why smart cities fail Read the wider analysis and comparison. 🏙️ Urban digital twins compared: Singapore, Tokyo, Seoul and Rotterdam Read the wider analysis and comparison.

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