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- W3032385625 abstract "Overtopping erosion is one of the main factors responsible for the destruction of earthen structures due to floods. Considering the shortage of existing studies and the need for further research to properly understand the processes leading to breaching failure, this study investigates the effect of compaction level (dry density) on the overtopping erosion response of model compacted silty sand dams using a laboratory flume apparatus. From side-view video recordings of the homogeneous earthen dam cross-section, digital image-processing techniques are employed to track and forensically analyse and interpret the initiation and progression of the erosion edge. The results indicate that the overall pattern of initiation and development of overtopping erosion depends on the compaction level, with greater compactive effort (higher shear strength of soil) reducing its progression speed, thereby increasing the time period for the erosion edge to reach the dam's upstream crest (t B ) and breaching failure. Artificial neural network and response surface methodology (RSM) approaches are investigated for estimating the experimental t B values, with the RSM-derived third-order polynomial found to produce good predictions for the three compaction levels investigated. Finally, recommendations are given for further research, including employing the experimental set-up presented for investigating other types of dam failure." @default.
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- W3032385625 date "2020-12-01" @default.
- W3032385625 modified "2023-09-26" @default.
- W3032385625 title "Overtopping erosion of model earthen dams analysed using digital image-processing method" @default.
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- W3032385625 doi "https://doi.org/10.1680/jwama.19.00098" @default.
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