Abstract
The aim of this work is to study the propagation of dam-break waves along a hillslope by mean of a physical model (basically i.e. a 3 x 4 m2 plane set downstream of a reservoir) build up in the Hydraulic Laboratory of the Politecnico di Torino. We want to recreate the water surface, to assess the shape of the flooded area and the arrival time of the wave front. The measurement facility is a high resolution CMOS camera. We measure the water height by linking the intensity of the pixels in the acquired images to the real water depth. Preliminary quantitative results are given for the 0°downstream-slope scenario and qualitative results are presented for the case of downstream inclined plane.
Highlights
Floods due to the breaching of earthen dams are a potential hazard to downstream areas
The aim of this work is to study the propagation of dam-break waves along a hillslope by mean of a physical model build up in the Hydraulic Laboratory of the Politecnico di Torino
The failure of a small dam can affect a limited area and has less devastating consequences compared to the failure of a large one
Summary
Floods due to the breaching of earthen dams are a potential hazard to downstream areas. The key factor is the estimate of flow depths and flow velocity The majority of these small dams (i.e., according to the Italian law, volume less than 1Mm3 and height less than 15m) are usually used for agricultural purposes or for artificial snow production. They have no natural inflow and no valley downstream so the propagation of the wave due to a dam-break can not be studied as a one-dimensional (1D) or a twodimensional (2D) depth averaged flow. Some authors demonstrated that measurements of various flow parameters, such as water depth and velocity field, can be acquired in an extensive way (i.e.,spatially distributed) by using image-analysis techniques. The experimental set-up, the light calibration and preliminary results are shown
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