2026-10-15T13:49:47Z https://data.mendeley.com/oai

oai:data.mendeley.com/7z93nccwsm.1 2026-09-24T23:27:31Z

Liu, shoutong Surficial slides accelerate retreat velocity of retrogressive breaching failure Mendeley Data Existing formulas for submarine face-retreat velocity are formulated for, and validated against, time-averaged, grain-by-grain breaching conditions; we hypothesized that they systematically underestimate the retreat velocity during surficial sliding events, and that this underestimation grows with the position along the face. The pointwise comparison confirms this: at the grain-by-grain level all three formulas reproduce the measured velocities only weakly (R² < 0, negligible or negative correlation), indicating that their parameters were calibrated for aggregated rather than pointwise retreat. During surficial sliding the discrepancy is larger and, critically, the enhancement ratio E = v_measured/v_e is not constant but increases with height above the toe H (r ≈ +0.78) and decreases with the local face angle α (r ≈ −0.57). We therefore introduce a height-dependent correction, v_SF = v_e + δ₀ + c(H/H₀)^d, where the constant δ₀ = −0.248 cm/s captures a systematic baseline offset and the power-law term c(H/H₀)^0.61 (c = 0.532) represents the additional transport driven by the sliding wedge, whose thickness and potential energy grow with height. This model explains 54% of the pointwise variance (R² = 0.542, RMSE = 0.094 cm/s) and is preferred over the constant-correction model by ΔAIC = 105. To interpret and reuse the data: (i) columns in each spreadsheet are defined in the README; (ii) the isSF flag in S2 labels each observation as grain-by-grain (0) or surficial-slide (1) according to the five events in the manuscript; (iii) a measured SF velocity can be predicted from the corresponding Eq.(3) velocity v_e and the point height H using Eq.(4); and (iv) the full pipeline can be rerun from S1 with the MATLAB scripts in /MATLAB_scripts. Ocean Engineering Coastal Erosion Experimental Approaches in Oceanography Dataset doi:10.17632/7z93nccwsm.1 oai:data.mendeley.com/7z93nccwsm.1 Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0 https://data.mendeley.com/datasets/7z93nccwsm 2026-09-24T23:27:31Z