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<p>On June 23, 2023, a flood with a recurrence probability of HQ5 occurred at the confluence of the Emscher River in Dinslaken, causing severe erosion on the left embankment. As part of the reconstruction, ecological improvements and flow-directing structures, such as groynes and deflectors, were implemented. To monitor flow dynamics and collect reliable velocity data, surface radar systems were installed at Heerstraße and Hagelstraße, along with a camera-based measurement system. An ultrasonic system at Konrad-Adenauer-Straße serves as a reference for validation. The aim is to improve data collection for future flood events and gain a better understanding of flow conditions in the newly restored sections. Initial results show that the surface radar at Heerstraße provides the most consistent data, while measurements at Hagelstraße are less stable due to ongoing construction work, which frequently changes the river profile and affects accuracy. The camera-based method showed the lowest precision. Ongoing analyses focus on identifying deviations and evaluating the reliability of the measurement methods.</p>

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Vergleich verschiedener Methoden zur Messung der Oberflächengeschwindigkeit an der Emschermündung (Dinslaken)

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Victoria-Sophia Scheuerer,
  • Alexander Hartung

摘要

On June 23, 2023, a flood with a recurrence probability of HQ5 occurred at the confluence of the Emscher River in Dinslaken, causing severe erosion on the left embankment. As part of the reconstruction, ecological improvements and flow-directing structures, such as groynes and deflectors, were implemented. To monitor flow dynamics and collect reliable velocity data, surface radar systems were installed at Heerstraße and Hagelstraße, along with a camera-based measurement system. An ultrasonic system at Konrad-Adenauer-Straße serves as a reference for validation. The aim is to improve data collection for future flood events and gain a better understanding of flow conditions in the newly restored sections. Initial results show that the surface radar at Heerstraße provides the most consistent data, while measurements at Hagelstraße are less stable due to ongoing construction work, which frequently changes the river profile and affects accuracy. The camera-based method showed the lowest precision. Ongoing analyses focus on identifying deviations and evaluating the reliability of the measurement methods.