Mouse drag: orbit · Right drag: pan · Wheel: zoom · Double-click: focus the barrier.
Space play / pause · 1–6 camera presets · R reset · M manual gates · F fast-forward.
Automated gates follow a one-way protection policy: allow drainage when inland water is higher, prevent saltwater intrusion when the sea rises. Pump stations actively discharge inland water seaward.
The hydrology uses an explicit simplified storage/discharge model; it is not a calibrated engineering flood model.