Dataset for Simulation of Landslide Dam Failure Due to Overtopping Considering Wide-Graded Soil Erosion

Landslide dams, as a particular type of secondary geological disaster, can cause serious flood disasters. Therefore, accurately predicting potential dam failure processes is crucial for developing reasonable emergency response plans. Currently, several landslide dam failure models have been proposed, but most of these models do not appropriately consider the wide gradation of landslide dam materials, which is essential for accurate erosion calculations. Therefore, this research proposes a relative exposure formula under three-dimensional conditions to account for the concealment and exposure effects between large and small particles in wide-graded soil. Based on this, the incipient velocity of wide-graded soil is derived, and a mathematical model of overtopping failure of landslide dams is established. As part of the model, a numerical solution process is also developed to ensure convergence.

滑坡坝作为一种特殊的次生地质灾害，能够引发严重的洪水灾害。因此，准确预测潜在的坝体破坏过程对于制定合理的应急响应计划至关重要。目前，已有多种滑坡坝破坏模型被提出，但其中多数模型未能充分考虑滑坡坝材料的广泛粒径分布，这对于精确的侵蚀计算至关重要。因此，本研究在三维条件下提出了一种相对暴露公式，以考虑广泛粒径分布土壤中粗细颗粒之间的隐蔽和暴露效应。基于此，推导出了广泛粒径土壤的起始流速，并建立了一种滑坡坝溢流破坏的数学模型。作为模型的一部分，还开发了一种数值求解过程，以确保收敛。