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<p>Heavy rainfall hazard mapping is often developed using 2D simulation techniques originally designed for river hydraulics. However, there remains a lack of reliable data, especially when it comes to estimating flow resistance coefficients for overland flow on natural terrain. To address this gap, a novel field laboratory has been established to allow high-precision measurements of flow dynamics and hydraulic parameters directly on real natural surfaces. This article introduces the experimental setup and measurement infrastructure, describes the testing procedures, and explains the method used to derive flow resistance coefficients based on discharge and flow depth. Initial investigations have been carried out on grassland, with additional research planned for other land cover types.</p>

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Experimentelle Untersuchungen zum Oberflächenabfluss auf natürlichem Grünland bei Starkregen

  • 期刊论文

  • 发表日期：

    2026年3月3日

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  • Peter Oberle,
  • Tim Jakobs,
  • Mário J. Franca

摘要

Heavy rainfall hazard mapping is often developed using 2D simulation techniques originally designed for river hydraulics. However, there remains a lack of reliable data, especially when it comes to estimating flow resistance coefficients for overland flow on natural terrain. To address this gap, a novel field laboratory has been established to allow high-precision measurements of flow dynamics and hydraulic parameters directly on real natural surfaces. This article introduces the experimental setup and measurement infrastructure, describes the testing procedures, and explains the method used to derive flow resistance coefficients based on discharge and flow depth. Initial investigations have been carried out on grassland, with additional research planned for other land cover types.