Study on redeposition of eroded finer particles during suffusion with image processing

An image processing-based approach is developed and integrated into the one-dimensional suffusion tests to quantify the redeposition of eroded finer particles along the seepage direction. The results indicate that the redeposition mass of eroded finer particles exhibits an exponential decay along the seepage direction across various soil gradations and hydraulic conditions. A theoretical relationship is established between this exponential decay and the redeposition probability. Furthermore, the redeposition probability is found to be negatively related to the content of finer fraction, which is demonstrated to be rooted in the transition from a homogeneous to a localized distribution of redeposition position within the cross-section as the content of finer fraction increases from 15% to 35%.