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首页> 外文期刊>Geodinamica Acta >Calibration of piezoelectric bedload impact sensors in the Pitzbach mountain stream
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Calibration of piezoelectric bedload impact sensors in the Pitzbach mountain stream

机译：皮茨巴赫山区溪流中压电基床冲击传感器的校准

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摘要

Non-invasive techniques to continuously measure the rates or intensities of bedload transport in gravel bed rivers would be quite useful for both research and practice. Since 1986 measurements have been made with piezoelectric bedload impact sensors (PBIS) in several mountain torrents. In 1994 and 1995, a calibration campaign was carried out at a water intake in the Pitzbach mountain stream in Austria, where weighing cells and a water pressure sensor in the settling basin allow sediment transport loads to be determined in 15 minute intervals. Daily averages of PBIS impulses correlate reasonably well with the measured sediment load. Using a linear calibration relation, the relative error between predicted and measured sediment loads is within a factor of about 1.5 to 2. The scatter between PBIS impulses and bedload volumes is much larger if the measurements are averaged over one hour intervals or when the original 15 minute values are considered. A comparison with measurements from the Swiss Erlenbach torrent and from laboratory experiments using sediment particles from the Erlenbach torrent indicates that the proportionality coefficient between PBIS impulses and sediment load appears to depend on site specific conditions, including factors such as flow intensity and sediment properties.
机译：连续测量砾石河床中河床输水速度或强度的非侵入性技术对于研究和实践都将非常有用。自1986年以来，已经在几个山洪中使用压电床荷冲击传感器（PBIS）进行了测量。 1994年和1995年，在奥地利Pitzbach山区河流的进水口进行了一次校准运动，在那里，称重传感器和沉降池中的水压传感器使每15分钟确定一次泥沙输送量。 PBIS脉冲的每日平均值与测得的泥沙负荷有很好的相关性。使用线性校准关系，预测的和测量的泥沙负荷之间的相对误差在约1.5到2的范围内。如果将测量值平均在一小时的间隔内或当原始15次来平均时，PBIS冲量和床面负荷量之间的分散性会更大。分钟值被考虑。与来自瑞士Erlenbach洪流的测量结果和使用Erlenbach洪流的沉积物颗粒进行的实验室实验的比较表明，PBIS脉冲与沉积物负荷之间的比例系数似乎取决于特定地点的条件，包括流量强度和沉积物特性等因素。

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