Overview
- Flights are scheduled for December 3–4 from roughly 08:00 to 16:30 along about 50 kilometers of the Ruhr.
- Duisburg, Oberhausen, Mülheim an der Ruhr, and Essen are on the route, and residents were advised of short-term helicopter noise.
- The operation involves circling select river sections multiple times to capture precise measurements and detailed topographic data.
- Authorities state the results will underpin planning for future flood defenses in a densely populated region that draws drinking water from the Ruhr.
- Local reporting cites measurements of river width, water depth, and flow to inform risk assessments, and no incidents were noted during Wednesday’s flights.