Semi-permeable sediment traps are designed to retain sediment during large floods and enable sediment transport continuity during ordinary floods by combining two barriers with a guiding channel. During floods, not only sediment but also large wood (LW) can be transported, that may block the inclined bar screen (mechanical barrier) and inhibit sediment transport. The design of the inclined bar screen has not been tested with LW. We conducted a first set of simplified flume experiments to study the effect of (1) initial conditions, (2) bar screen design, and (3) LW volume on sediment transport. First results demonstrate that a LW volume blocking 20% of the flow cross-section is sufficient to reduce sediment transport by 50%. Hence, LW volume is a relevant parameter for the design of inclined bar screens. We provide future research ideas to enable the local separation of LW and sediment.

半渗透式沉积物捕集器旨在通过将两个屏障与导向通道相结合，在大洪水期间保留沉积物，并在普通洪水期间实现沉积物输送的连续性。在洪水期间，不仅可以输送泥沙，还可以输送大型木材（LW），这可能会阻塞倾斜的栅栏（机械屏障）并抑制泥沙输送。斜条筛的设计没有经过 LW 的测试。我们进行了第一组简化水槽实验，以研究 (1) 初始条件、(2) 条形筛设计和 (3) LW 体积对沉积物输送的影响。第一个结果表明，阻塞 20% 的流动横截面的 LW 体积足以将泥沙输送减少 50%。因此，LW 体积是斜条筛设计的相关参数。